Have a question? My team and I are happy to hear your questions and get you answers! When you type a question, it shows up not only on that experiment but also here so you can easily find your answer. You'll find question boxes at the bottom of every experiment in the program.

Question: from Cindy Soderlund about the Crystal Radio experiment :

Hello again. Where can I buy magnet wire?

Answer:  Crystal Radio

Not all experiments come with worksheets, but many do.

Question: from Cindy Soderlund about the Crystal Radio experiment :

Silly question, but want to be sure. Do all experiments come with worksheets or does it vary?

Question: from Amanda Mcabee about the Bouncy Ball experiment :

bloopers was funny

Answer:  Eclipses and Transits

Make sure you're logged in first, and then you should be able to view the PDF file.

Question: from Cindy Soderlund about the Eclipses and Transits experiment :

Hi. Your link to download the worksheets and exercises isn't working.

Answer:  Walk Around the House

I'll be happy to help! Which question is it that you don't understand?

Question: from Lisa Schrohenloher about the Walk Around the House experiment :

I don't understand your question

Answer:  Conversion Charts

Usually, the answer is "Yes, no problem!" However, everything you need for Apologia Zoology 2 is contained within Unit 18 (and would be really short and redundant to make an entire conversion chart for it), so I would recommend starting with your current curriculum and add in experiments from Unit 18 as you go along. It's easy to figure out where to put the experiments, since they are labelled with the type of creature, like "Worms" or "Sponges". Let me know if you need more help as you go along! Also note - there's a whole high school biology course for Apologia here: http://www.sciencelearningspace.com/grade-levels/advanced-projects-2/apologia-biology/

Question: from Robyn Jaffin about the Conversion Charts experiment :

Can you do a conversion chart for Apologia Zoology Swimming Creatures of the 5th day

Answer:  Bomber Plane & Wind Tunnel

Yes, it's something I have been working on for a couple of months, and I've recently been gathering up all the feedback from folks like you so I can make it the way you'd like it to be! If you do have suggestions before I finish up the work on it, feel free to email me directly at aurora@superchargedscience.com and let me know what you like (what we should keep) and what could be better (and how?)... that makes it so much easier than trying to guess at what I think will work for you! One of the biggest challenges has been the sheer amount of content on the site, and organizing it in a way that you can find it without getting all mixed-up. I am also making it able to track your progress, so you can tell how much of each section you've completed in addition to being able to be led step-by-step through each different science area. Currently when you cross over to the Grade Level section, the navigation still thinks you are in the Topics section and mixes up the menus on the right, so you have to go back to the Grade Level Topic in order to stay in sequence. Originally I thought I could just fix this easily, but it's requiring a LOT more work than I initially thought! These major updates should be complete within the next couple of months. Note that I am not going to change it all right away - these new changes will first appear a separate (but otherwise identical) site for you to test out and try it out and provide me with more feedback, and then I will move it over to take the place of the current navigation. I'll let you know when you can test it out for me. Thanks!

Question: from Albert O. about the Bomber Plane & Wind Tunnel experiment :

I saw something that said you were going to update the navigation? What's that going to be like? ANd when??

Answer:  Flying Contraptions

Most folks can start with the appropriate grade level for their students, and after you’ve completed those, you can dig it more by subject (that way you won’t miss anything!). And remember, you don’t need to do all the experiments to get a great science education – there’s a lot of overlap so you don’t have to commit to each one. Just pick and choose the experiment lessons you’d like to do and progress from there. You’ll find assessments you can use at the end of each section within each grade level. Personally, before I get started on a big endeavor like planning what to learn or teach for the year, I first write out what my educational goals are for the year. What do I want them to know, understand, and be able to do by the end of the year? (it’s kind of like planning out your weekly meals before you start shopping, so I can feel great walking out of that store with things I really need, instead of what’s most enticing when I walk by). That said, with the program, if your goal is to interest and excite your kids about science, then it’s ok to hop around to the things that interest them most and you don’t really need as rigorous of a scientific notebook/journal as much as a science scrapbook photo album of their progress (if that suits you). If you’re preparing them to really think like a scientist and learn the process of how to do science itself, that’s going to have a different approach, as will preparing them for high school. What you do with the program is also going to depend on what kind of documentation your local state requires at the end of the year. If you need to keep a science journal, you’ll find how to do that here: http://www.sciencelearningspace.com/category/resources/keeping-a-scientific-journal/ I would first figure out your educational goals and then it will be easier to figure out how to meet that goal – use this approach for any curriculum, not just ours. Hope this helps!

Question: from TW about the Flying Contraptions experiment :

I was inquiring about how to go about using the science with a 5th grader and an 8th grader? Do I start a notebook for them? Will there be worksheets for comprehension? Are there tests or quizzes?

Question: from karen LaPlante about the Optics, Fire, and Eyes experiment :

I have a very burnt and black sapling twig XD

Answer:  Conversion Charts

Sure! We have the Apologia Biology match up here: http://www.sciencelearningspace.com/grade-levels/advanced-projects-2/apologia-biology/ We had so many requests for it, and it was such a big conversion chart that I created a page so it wouldn't be too confusing to use. Hope this helps!

Question: from Heidi Pritchard about the Conversion Charts experiment :

Hello Aurora, I am also looking for the Apologia Biology conversion chart. When you get that for the other folks that asked about it, will you post it here on the list?

Answer:  Cool Carrot Osmosis

Yes, please try both and update us with the results!

Question: from Tracey Harrigan about the Cool Carrot Osmosis experiment :

I haven't tried this yet,but I will.Has anyone tried putting sugar in it?Someone mentioned that,but I'm curious. BTW,what would happen if you sugar and salt in?I think I will try both,then tell you all what I learned.Ciao.

Answer:  Catapults

All objects fall 16 feet during the first second after they are released, if there's enough room. If you only have 5 feet before it hits the floor, then it's only going to fall 5 feet then *smack!* and it comes to rest. It's because on the surface of the earth, the Earth's gravitational field pulls on all objects equally, no matter if they are a ping pong ball or a bowling ball... they are both affected by the Earth's gravitational field.

Answer:  Birds and Mammals Exercises

Hi Heather! There are two ways you can use the program: you can either go through the content by grade level (which works its way through the subject incrementally), or by topic (and get ALL the information in one swoop), and the downloads (like the exercises and quizzes) reflect this difference. It wouldn't be fair to quiz students on content they haven't covered yet, so the questions in by Grade Level only cover the experiments and concepts covered in that particular grade. At this time, the videos are only available online. We do offer the Ultimate Science Curriculum, which are segments of the e-Science program for folks who don't have an internet connection. Hope this helps! Do let me know if you have any further questions.

Question: from Heather Baker about the Birds and Mammals Exercises experiment :

Hi. I'm looking at the questions for Birds and Mammals. I accessed it by going through the first grade level life science. Why is it that the information is different when I click on the printer friendly version? I've noticed this in several other places. Also, our internet is intermittent, so I download content to my computer to access it when the internet is not working. Is there a way to download the videos so for when we are offline? Thanks!

Answer:  Flashlight Laser Tag

Yes, it's included in the Diamond Science Mastery program in the Electronics I package (in the box labelled "D2"). Use the included breadboard to make the circuit. You'll find the laser in the Electronics 2 package. Watch the first and second videos and you should have everything you need. Happy building!

Question: from Kathleen Broaddus about the Flashlight Laser Tag experiment :

Are the materials needed for this project included in any of the kits that come with the Diamond package?

Question: from Amy Beebe about the Catapults experiment :

What do you mean something falls "16 FEET" in the first second? Wouldn't you have to be up on a building for it to fall that far? Does this have something to do with the revolution of the Earth? Can you please explain this? I do not understand it and I KNOW my daughter will ask me about it!

Answer:  Bomber Plane & Wind Tunnel

Does it work now?

Question: from Cynthia Farrer about the Bomber Plane & Wind Tunnel experiment :

the vidio wont' load up!

Answer:  Star Gazing

Yes, there's an observing log and an observation and sketch template available here: http://www.astromax.org/aa02801.htm

Answer:  Color Streak

Sure! The shopping list for Unit 20 is here: http://www.sciencelearningspace.com/2013/09/shopping-list-for-unit-20/

Question: from Jennifer Yoch about the Star Gazing experiment :

Can you tell me where to find the star gazing log?

Answer:  Rock Candy Crystals

Coconut sugar should work! Please let us know how it turns out for you.

Question: from ERICA KASSNER about the Color Streak experiment :

I have attempted to find the shopping list that goes along with Unit 20 (I read another comment first) and I cannot find it. Can you please link the shopping list to find the rock samples for this lesson as well as other lessons for Earth Science Grade 2? Thanks

Question: from ERICA KASSNER about the Rock Candy Crystals experiment :

Hi again! Can we use coconut sugar for this experiment or does it need to be cane sugar?

Answer:  Burning Sulfur

Wonderful! I am still putting on the final touches to the chemistry course, but the shopping list is ready to go. Please note - you don't have to do ALL the experiments to get a great science education! I would pick and choose the experiments you want to do, or just get the C3000 for starters and if your student(s) really want to do more, then you can add on more experiments later int he year. I really tried to get "everything all in one box" (that's how Unit 8 started out, and also Unit 15) but unfortunately, the manufacturers kept changing what they include in the box, so now it's near impossible to get everything from just one order click.

Question: from Lisa Pearson about the Burning Sulfur experiment :

I am looking ahead at the advanced chemistry course for high school this year. Trying to gather everything from the materials list so that we are ready to go.

Answer:  Burning Sulfur

You can make your own oxygen doing one of several experiments. Just do a search here for “generating oxygen” and you’ll find one. Are you working through the C3000 manual? It will tell you specifically how this is done.

Question: from andrea alfred about the Listening with Lasers experiment :

Hi, From the Laser Communicator video we found how to send sound over a laser, but I cannot find where it shows how to receive sound using a laser on a window. Is there another video somewhere for the spy device? Thank you, Andrea

Answer:  What happens to helium when you chill it?

The volume of a specific amount held at a constant pressure would be directly proportional to its temperature. So as the heat increases quickly, so would its volume (and vice-versa!)

Answer:  Forensic Science

The e-Camp program hibernates for the winter starting in October for all of our families so that we can update and improve it for the following year.

Answer:  Grandma’s Silver

Yes, it's a similar process. Silver tarnishes from sitting by being exposed to sulfur-containing substances in the air.

Answer:  Three Ways to Create a Plant

There is no video on this page :)

Question: from Kathleen Broaddus about the Forensic Science experiment :

We're totally new here, so to clarify the above question about the forensics science area, is that a part of the summer camp that expires in October? Or if you are a Diamond Member will it be available for the five years? Thanks!

Question: from Amber Thornton about the Three Ways to Create a Plant experiment :

Is there an experiment here that I am missing or is this just a reading page?

Question: from Kelli Kruid about the What happens to helium when you chill it? experiment :

yes it makes sense, but what if it gets really hot really fast?

Question: from Lisa Pearson about the Burning Sulfur experiment :

Where do I get a test tube of Oxygen? I didn't see anything on the master materials list that looked like this.

Question: from Lisa Pearson about the Grandma’s Silver experiment :

My silver tarnishes from sitting, just exposed to air. Is this a similar reaction as to the sulfur in food? Will the chemistry be the same?

Answer:  Finger Thermometers

We use glass cups in this experiment. You can use soup cans if you don't have glass, but you will want to use a material that will effectively transfer heat to the outside of the container.

Question: from Donna Ready about the Finger Thermometers experiment :

You said not to use plastic cups for this, but it looks like you are using plastic cups. Ok or not to use the clear plastic cups you used or are they another type of material?

Answer:  MIT Leg Lab

Your problem sounds very much like it relates to a Flash Player problem. There have been some recent updates on browsers over the past couple of weeks. These updates have, in some cases, disabled Flash Player from automatically loading on pages.I’m not sure what browser you are using, or if you have checked with another browser, but I would make sure Flash hasn’t been disabled. Here are a few links to the main browsers: https://helpx.adobe.com/flash-player/kb/enabling-flash-player-chrome.html https://helpx.adobe.com/flash-player/kb/enabling-flash-player-firefox.html https://helpx.adobe.com/flash-player/kb/enabling-flash-player-safari.html After making sure Flash Player is installed and enabled, you should then have no trouble with your video.

Question: from Patricia De Lazzari about the MIT Leg Lab experiment :

Hi - we cannot see the video. There is just blank screen where the video box should be. We can see the writing. Thanks.

Answer:  Moon Sand

Yes, arrowroot or tapioca should both be good substitutes (though our team has not personally tried either in this particular experiment.) Please report back and let us know how it goes!

Question: from ERICA KASSNER about the Moon Sand experiment :

What substitution can we use for cornstarch? Would arrowroot work? Tapioca?

Question: from Aurora Lipper about the Simple Hovercraft experiment :

A thumbtack is the same thing as a pushpin.

Question: from Heather Grimm about the Simple Hovercraft experiment :

what is a thumbtack

Question: from Aurora Lipper about the Hygrometer experiment :

You can try using wool yarn if you're unable to find a sample of hair to use in your experiment.

Question: from Jen Peterson about the Robotics Competition experiment :

cool

Answer:  Squished Soda Can

Grocery stores or drug stores will carry these. You don't have to use a portable one - I did just to make the video easier to shoot.

Answer:  Unit 3: Matter (Density & Atoms) Reading

The atomic mass of the periodic table is based upon all known isotopes of each element and their weights multiplied by their abundance. She used Carbon and gave an accurate example, but to use a less common one, consider Hydrogen and deuterium (heavy Hydrogen). We use dH in mass spec analysis all the time. Normal H has an abundance of 99.98% and weighs 1.007= 1.006 Deuterium has an abundance of 0.011% and weighs 2.01= 0.002 I have rounded for simplicity and to include the trace presence of tritium, but these two added together give you the typical ~1.008 g/mol found on a periodic table. Also - No. Electron moves, due to transfer, are never factored into atomic weight. The atomic weight is solely based on isotopes (varying number of neutrons), their abundance, and an equal number of electrons and protons. However, the mass itself does not factor electrons, as it is summed by the weight of the protons and neutrons only. My best guess is that this is because there needs to be consistency in the periodic masses, and it is commonly known that electrons have a mind of their own and that would lend to complete inconsistency. Hope this helps! Aurora

Question: from Jodi about the Unit 3: Matter (Density & Atoms) Reading experiment :

Hi Aurora, Thanks so much for the email, and for your clarification. Actually, my question really was just about how mass is calculated for the periodic table--I was aware that many elements are only found only in ionic form, and that by losing or gaining electrons the mass does technically change, if very minutely, but I was taught that the actual mass recorded on a periodic table doesn't include the mass of the electrons. Is this accurate? Again, if the entire periodic table is based on the assumption that carbon-12 weighs exactly 12.0000 amu, and each proton and neutron weighs exactly 1 amu, respectively, the additional weight of the electrons, regardless of whether or not the element only exists in ionic form, is not included. Is this correct? Are electrons ever included in atomic mass calculations for the periodic table? From what I understand, electron mass is estimated to be around 0.00054 amu, and since most periodic tables only show 3 significant figures past the decimal, electron mass would not even show up for small atoms with only a few electrons, but I would think it would show up for larger atoms with more electrons. I just wanted to know if electron mass is ever included in the periodic table atomic mass measurements, because I had been taught that it was never included. Again, thank you so much for your reply, and my apologies if my emails are confusing! :-) All the best! Jodi

Answer:  Unit 3: Matter (Density & Atoms) Reading

Yes, you are correct – and I reference this in problem #2 of HW set #6 in the advanced HS Chem course I am developing and publishing now (should be totally ready to go this coming fall). However, when an ion is formed (the electron is gained or lost), the mass will also change, but this is not used in calculating the weight on the periodic table. Columns 1, 2, 16, and 17 rarely exist outside of ionic form, and I think this may have been what you were thinking about?

Answer:  Hovercraft Spaceship

Thanks for letting us know - I'll have my team fix it!

Question: from Olwen watkins Olwen watkins about the Hovercraft Spaceship experiment :

it wont play this video

Answer:  Hovercraft Spaceship

A couple of the videos only play over one speaker, so you'll want to be sure that both are turned up when you watch the videos.

Question: from Fayola Herod about the Automatic Envelope experiment :

Thank you for this! My son has written notes to family members and will mail them today.

Question: from Jodi Purser about the Unit 3: Matter (Density & Atoms) Reading experiment :

I just saw one of your answers about the reason why most atomic mass numbers are not whole numbers on the periodic table, in which you indicated that the reason was because of the near insignificant mass of the electrons being added in (your original answer is attached below). Are you sure this is correct? I thought the reason why the mass estimates were never whole numbers was because the estimates for atomic mass on the periodic table always show the average atomic mass for a given element, which would include all the isotopes of that particular element, in their relative percentages. For example, let's look at Carbon: Carbon 12 (6 protons, 6 neutrons) and Carbon 13 (6 protons, 7 neutrons) are the two main isotopes of carbon (Carbon-14 is also naturally occurring, but there are only trace amounts of it). Carbon 12 makes up about 98.9% of all naturally occurring carbon, and Carbon-13 makes up about 1.1% . All isotopic masses of every element are based on the assumption that Carbon 12 is exactly 12.0000 amu (atomic mass units). The atomic mass for carbon listed on most periodic tables is 12.011 amu, which would be the weighted average of the Carbon-12 and Carbon-13 isotopes (i.e. 0.989x12.0000 + 0.0107x13.0000 = 12.011). Electron masses are assumed to be zero. Can you please confirm this? I am not a chemist (I'm a geophysicist), but this is what I was taught in all my college chemistry classes. Thanks! Jodi Purser -------------------------------- Aurora says: Tuesday at 7:40 pm Atomic weight of a proton is always 1. Atomic weight of a neutron is always 1. The atomic weight, or atomic mass, is protons + neutrons + electrons. The atomic mass is more than the sum of protons + neutrons because while electrons have a relatively insignificant weight, but they weigh something all the same. Here’s an example: A normal He (Helium) atom: Atomic number is 2 Atomic number is equal to the number of protons, so the atomic weight is 4.0026 Atomic weight equals approximately the number of protons plus neutrons (the small difference is the mass of the 2 electrons) Round down the atomic weight to 4 Adjusted atomic weight (4) – number of protons (2) = number of neutrons (2) 4 – 2 = 2 Therefore: The atomic weight of a proton and a neutron always equal 1, and the reason the atomic weight is not a whole number is due to the relatively insignificant mass of the 2 electrons orbiting outside the nucleus.

Question: from Olwen watkins Olwen watkins about the Squished Soda Can experiment :

where do you get a portable stove

Question: from Olwen watkins Olwen watkins about the Microscopes and Telescopes experiment :

thanks

Question: from David Harn about the Microwaving Soap experiment :

We didn't have any Dove soap around, so we tried it with Irish Spring. It doesn't come out near as "fluffy", but it works, although it produces a less than desirable aroma. (Could be the perfume or the dye. I'm not sure which.) My eight year old daughter complained that she couldn't see the action through the shielding in the door glass, and it was rather hard for me to see, as well, but the result was clearly in line with what we expected. We'll get a bar of Dove and see if the results are more to her liking. (More fluffy and less bad smell.) Thanks for the great experiments. My kids are in love with the program and every project we've done so far.

Question: from David Harn about the Significant Digits experiment :

I have yet to figure out where this will be helpful, but all knowledge is welcome. Both I and my children (age 8 and 10) are hooked on learning anything and everything there is to learn. I'm sure this information will come in handy in our further explorations of science. Thank you.

Question: from Indu Patel about the Hovercraft Spaceship experiment :

Hi! This is Sindur. I am having the same issue for only this video. I can not see the video screen on the page, and this is the only video that does this. I am also experiencing sound issues for a few specific videos. I have tried to reload the page, but nothing seems to be working. Do you have a way to fix this? Thanks!

Question: from Kimberly Voelkel about the Hygrometer experiment :

Are there any sustitutes for hair?

Answer:  Corny Slime

There really isn't any other substitute... you have to use a speaker for this particular experiment.

Question: from Lisa Pearson about the Stirling Engine experiment :

Cool it looks awesome!!!!

Question: from Kimberly Voelkel about the Corny Slime experiment :

What can I use instead of an OLD speaker and a bass?

Answer:  Cartesian Diver

Not really, because the cap needs to be screwed on tightly (so it won't pop off when you squeeze the sides) and you also need the container to be clear so you can see through it.

Answer:  Shopping List for Unit 4

Yes it's included with the Science Mastery program kits we sell on our website.

Question: from Olwen watkins Olwen watkins about the What is Fire? experiment :

soooooooooooo cccccooooooll

Question: from Renata Rosenfeld about the Shopping List for Unit 4 experiment :

Is there a full kit for the earth mover? I couldn't find it.

Question: from Jami Bustamante about the Cartesian Diver experiment :

Would a plastic milk container work in place of a 2 liter bottle?

Answer:  Squished Soda Can

Make sure you are logged in first!

Answer:  What is Fire?

Until the alcohol is completely consumed and the fire dies out (due to lack of fuel). Usually about 5 seconds.

Answer:  Flying Contraptions

That's an interesting idea... you can try, and then let me know what happens!

Answer:  Ten Static Electricity Experiments to Mystify Your Kids

This is one of the very few experiments that didn't have a video, however in a couple of weeks I am releasing a new experiment just in static electricity (with a video) that will have a lot of cool ideas for you to try. Check the Summer e-Camp Electric Lab soon!

Question: from Kimberly Voelkel about the Ten Static Electricity Experiments to Mystify Your Kids experiment :

I can't find the video. Can you make that video appear?

Question: from Kimberly Voelkel about the Squished Soda Can experiment :

I can't watch the video because it did not appear. How am I going to make that video appear?

Question: from Kimberly Voelkel about the What is Fire? experiment :

How did the water and alcohol keep the dollar from burning?

Question: from Tamara Howard about the Flying Contraptions experiment :

Are you supposed to put a 3rd circle in the middle?

Question: from Olwen watkins Olwen watkins about the Hybrid Rockets experiment :

sooooooooooooo cool

Question: from Melanie Williamson about the Diamond Kite experiment :

okay, thanks!

Question: from Melanie Williamson about the Special Science Teleclass: Thermodynamics experiment :

whoa, it is so weird to think nothing you touch is really cold or hot,(well it's just what we call both kinds of heat flow ) . it just is sensors in your skin that read heat flow. Thanks Aurora I learned a lot.-Gabe

Answer:  Chicken and the Clam

Not a problem at all... the ice stays because it's surrounded by a fluid and not rigidly locked into place like solid object would be. Ice has more inertia (resistance to motion) than the water around it, so the water moves more easily than the ice. Great question!

Question: from Andrea Rosario about the Chicken and the Clam experiment :

Hi Aurora! What you said about the chicken broth staying in place while the can moves got me thinking.... when you get a glass of ice water and you move the cup clockwise and counter-clockwise, the ice stays in the same place and position most of the time. Why does this happen? Sorry if it's a little off-subject. Arteah Rosario

Question: from Ingrid Cordano about the Pendulums experiment :

:)

Answer:  Reading about Intermedate Level Chemistry

I am guessing you are referring to the USC DVDs that are Chemistry 1 & 2 from this page: http://www.superchargedscience.com/usc-info.htm If so, then no, those are only intended for K-8. I began working on Chemistry 3 which would be just for High Schoolers, but then I ran into a problem... there was so much content for this course that it ended up needing over 30 DVDs to fit everything, even at low-resolution! So what I've done now is put it together and organized it into a HS Chemistry course in the e-Science program online, which you can find here: http://www.sciencelearningspace.com/grade-levels/advanced-projects-2/adv-chemistry-course/ Please note that I am still creating and publishing this course, so you'll see updates and changes posted over the next couple of months. Hope this helps!

Answer:  Quick 'n Easy Slingshot Rockets

What if you turn up the end of the paper clip to make kind of a stop there? You may have to use pliers...

Question: from Erin Allport about the Reading about Intermedate Level Chemistry experiment :

Are the chemistry 1 and chemistry 2 classes enough for a high schooler who wants to pursue an English degree in college?

Question: from Amanda Mcabee about the Quick 'n Easy Slingshot Rockets experiment :

the rubber band won,t stay on the hook.

Answer:  How to use a Digital MultiMeter

It depends on how salty your water is. If It might be interesting to see how electrical resistance (make sure you are measuring ohms here) changes as you add more and more salt. You can keep your LED hooked up in the circuit as you do this as well. Great job being curious! Do let me know what you find out!

Answer:  Cosmic Ray Detector

Hmm, if you can't see the vapor trails and you only see the mist or smoke, wait another 10 minutes for your system to get really cold. Put your hand on top of the jar to warm it (the side without the dry ice). Did you also turn off the room lights and use a flashlight to shine the beam through the side of the jar? If after waiting still no tracks appear, check to be sure you have an airtight seal. If not, tighten that lid and try again, and you can even add a little more alcohol first. You can also change the position of the jar - sometimes it's hard to see the tracks in certain positions, so you can place black paper behind the jar so it's not quite so see-through. If all those tricks don't help, I would use a larger jar and a different radiation source. Hope this helps!

Question: from Jennifer about the Cosmic Ray Detector experiment :

Hi, we're trying to do the cosmic ray detector with alcohol and dry ice. Followed to the letter as far as I can tell but didn't work - no trails at all. Please give some tips to increase the probability of this thing working. Thanks. Jennifer