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 Aurora Lipper about the Conductivity Testers experiment :

Interesting samples! Did you notice a difference in the frozen versus thawed mango?

Question: from studiojmm about the Conductivity Testers experiment :

We also tested the human body and it does conduct (3 AA batteries) but the light is not as bright as many of the other things we tested. We also compared various foods, including frozen vs. thawed mango, an apple, cheese, etc. and dry salt vs salt with some water.

Question: from Aurora Lipper about the Predator-Prey: Who Eats Whom? experiment :

Great tip! I'm glad you were able to troubleshoot it. Thanks for sharing :)

Question: from Aurora Lipper about the Nomenclature and formulas of binary compounds experiment :

Yes, a perchlorate ion is the least reactive oxidizer of the all chlorates.

Question: from eva_dellinge about the Predator-Prey: Who Eats Whom? experiment :

Regarding our problem with dripping: we tried dental wax around the opening, and that did the trick!

Question: from eva_dellinge about the Predator-Prey: Who Eats Whom? experiment :

We're having trouble keeping our small water canister from leaking. Instead of feeding along the string, it drips out the bottom. Any advice?

Question: from themorozovs about the Nomenclature and formulas of binary compounds experiment :

Hello, Ms. Lipper, Do we use the "hypo", "ite", "ate", and "per" prefixes and suffixes relative to the amount of oxygen in the compounds we're comparing, or will ClO4 always be perchlorate? -Anna Marie

Question: from Aurora Lipper about the Can Solar Energy Be Concentrated? experiment :

Thanks for your eagle eye! This is corrected :)

Question: from tntmnm about the Can Solar Energy Be Concentrated? experiment :

Need to fix the sentence, "... intensely bright and not spot of light." : "not" should be "hot". Thanks!

Question: from Aurora Lipper about the Zinc Dust experiment :

Sodium hydroxide is made during experiment #170 if you're using the 2.0 version of C3000. Unfortunately there is no longer any zinc powder in the newest version, but it can be obtained at ceramic or pottery stores. Here's the material match for C3000: http://www.sciencelearningspace.com/standardcontent/docs/unit15-revisions.pdf I hope this helps!

Question: from Aurora Lipper about the Chemical Fingerprinting experiment :

You can actually make your own! Here's the link: http://blog.teachersource.com/2014/02/05/make-goldenrod-paper/

Question: from Aurora Lipper about the Forensic Science experiment :

Thank you so much for your kind words :)

Question: from stevejanann about the Chemical Fingerprinting experiment :

Can you tell me where I can purchase only a few sheets of goldenrod paper? I can only find them in quantities of 100 for about $30.00.

Question: from Kathleen Broaddus about the Zinc Dust experiment :

I could not find zinc powder in the Chem C3000 kit, or sodium hydroxide (solid). Are they not included?

Question: from JuleeMcIntosh about the Forensic Science experiment :

I love science and I really love your work I'm on my moms account XD but I really hope you read this I'm super late but I don't really care but never give up on your hard work it makes the world happy god bless you!

Question: from Aurora Lipper about the Earthworm Dissection experiment :

Earthworms are hermaphrodites, so they have both male and female reproductive organs.

Question: from jeswomack about the Earthworm Dissection experiment :

How can you tell if an earthworm is a male or female? Or is there even a difference?

Question: from Aurora Lipper about the Crystal Radio Project experiment :

That's a great idea!

Question: from roboshort about the Crystal Radio Project experiment :

You should make a video on how to make a cb radio

Question: from Aurora Lipper about the Retrograde Motion experiment :

Hi Payton! Earth would appear to move in retrograde from the planets that are closer to the sun. So Earth would appear to move backward from Mercury or Venus, but not Mars.

Question: from jkptexan5 about the Retrograde Motion experiment :

hi, my name is Payton I am 11 and I was asking this question if we were on mars would earth do a retrograde motion?

Answer:  Special Science Teleclass: Thermodynamics

I'll have someone connect with you via email!

Question: from kellydandjlee2002 about the Special Science Teleclass: Thermodynamics experiment :

We have the K-8 registration, how do we upgrade to be able to complete this experiment, we already have the supplies.

Question: from lesheadrick about the Wave-Particle Duality of Light experiment :

I loved the experiment for the light video so cool and fun.Also love the video really cool please keep showing more science video. :)

Question: from crystal about the Special Science Teleclass: Thermodynamics experiment :

Oh no! I'll have a member of my staff check in via email right away so we can get this corrected for you.

Question: from crystal about the Can Wind Be Used as a Source of Energy? experiment :

Impressive!

Question: from crystal about the Can Fish Drown? experiment :

We recommend Home Science Tools for just about everything you need for chemistry. You'll find their glassware here: https://www.homesciencetools.com/chemistry/glassware-plasticware/ Sorry about the little fish! You are right, though. The poor guy probably ran out of air.

Question: from cinfetty47 about the Special Science Teleclass: Thermodynamics experiment :

I paid for the K-8 curriculum, but I cannot access it. Help!?!?

Question: from tntmnm about the Can Wind Be Used as a Source of Energy? experiment :

We used a wooden shish kabob stick for the shaft and a card-stock pinwheel template. It lifted 10 sharpie markers with a window fan!

Question: from jpramirez28 about the Can Fish Drown? experiment :

that is awesome, that's probably why a tiny fish that i found died in a tiny bucket of water. also do you know where you can get good quality test tubes and beakers.

Question: from crystal about the Higher pressure always pushes! experiment :

What do you think will happen? Give it a try!

Question: from rwu about the Clam Dissection experiment :

We enjoyed seeing the insides and learning the parts of the clam with the lady in the video. The mnemonics she used to teach the parts were very helpful. And yes- it was confusing to get channeled to a commercial website when we were expecting to find a diagram. That link was misleading and futile. Our problem was solved old fashion way. My child drew the clam and copied the name of the parts. We are all happy and look forward to more dissections without getting our hands dirty.

Question: from lesheadrick about the Higher pressure always pushes! experiment :

If you blow really really really hard what would happen? like a hard short blow

Answer:  Safety Information

You can watch the intro video here: http://www.sciencelearningspace.com/study-units/unit-15-chemistry-2/ Thanks for checking!

Question: from crystal about the Conversion Charts experiment :

If you'll email a table of contents to us at [email protected] we'll prepare a match for you :)

Question: from eliz720 about the Conversion Charts experiment :

What about Waldorf curricula such as Waldorf Esssentials?

Question: from katbro3649 about the Safety Information experiment :

We're getting read to start chemistry next week, so I am trying to jot down an outline of a schedule for the next few weeks. At the beginning of the Advance Chemistry course under Step #3 it says to watch these videos in order. Yet on this lesson about Safety Information, it says to make sure to watch the introductory videos for the Intermediate Chemistry and the Advanced Chemistry lessons, as they contain important info about the chemicals and lab equipment. When I click on the link for the Intermediate Chemistry, I couldn't find any introductory video. If I click on the videos and experiments link on the right side of that page, it takes you to a long teleclass with experiments. If I click on the Advance Chemistry listed above on this page, I find no intro video there either. It has a video that picks up where another lesson levels off. Are there any intro videos we should be watching behind those links? Or should we ignore these two links above? Thanks! Sorry this was long!

Question: from crystal about the Clam Dissection experiment :

My apologies for the confusion. It's not our content to share, but we do often provide links such as this one to external sources so that you can purchase materials for projects.

Question: from rwu about the Clam Dissection experiment :

Is the link to "Clam Diagram" a mistake? I thought it would lead to a diagram for my child to label the parts of clam but it leads to another homeschool commercial website where I have to pay to get a diagram. We paid some $1200? for this?

Answer:  Robot Cookie Snatcher

The instructions are here: http://www.sciencelearningspace.com/2010/03/robotic-cookie-snatcher/ The page you were on was in the area where we post videos and images that kids send in from projects they have built.

Question: from lesheadrick about the Robot Cookie Snatcher experiment :

where are the instructions to make a robot cookie snatcher?

Answer:  Trebuchet

Sorry for the delayed response! Which one did you have a specific question about? I am happy to help answer any questions you have - just let me know where you are getting stuck. For future math problems in the high school section, you'll find homework sets that have fully detailed solutions written out so you can easily follow along and understand how the solution works.

Answer:  Introduction to Creating a Homemade Weather Station

Sorry I missed seeing your question! A sun room will only give you the weather in the room itself. If you want it to be more accurate, you've got to put it outside for most of the instruments. The only one it really doesn't matter for is the barometer, which will indicate if a storm is brewing or if the weather is going to be fair and nice. You'll notice the stick moves in one direction for good weather and the other when bad weather (storms) are coming. Does that help?

Answer:  Getting Started With Digital Logic 1

Sorry I missed seeing your question! I am glad you are enjoying the projects. What is the trouble you are having specifically with the videos not playing? You'll notice that you need the upper level access to watch the videos in this section. If you still have technical issues, feel free to email us directly at: [email protected]

Answer:  Introduction to Kinematics

That's correct - the lessons walk you through one-by-one. I am finishing up the new navigation structure that will have this look a lot better so it's more obvious how to work through the website lesson by lesson, and will let you know when it's ready for you to try out. Also, note that the lessons are also listed in order in the big download for the section you are on. You can take notes in the download as well (that's why there's so much space on each page). The labs are interspersed with the lessons so they can really get a sense of the purpose of what they are learning about as they go along. The homework set is only in written form, with solutions clearly marked out (no video for this section - it's just like a regular problem set you'd get for hw in a real physics class). If you have questions about a particular problem, do let me know so I can help.

Answer:  Introduction to the course

That's great idea - I did this for Physics but just realized it isn't done for Chemistry. Let me look into it when I get back into content creating in a couple of weeks.

Answer:  Drop Rocket with Launcher

You can find tubing at a hardware store like Miner's Ace or True Value... not Home Depot or Lowe's or Orchard Supply. You need a real hardware store, not a "home improvement" store. I've also found it at craft stores like Beverly's in the model/wood section.

Question: from katbro3649 about the Introduction to the course experiment :

Is there a link where we can easily print out the Table of Contents of the lessons for the Advance Chemistry course? I'm trying to save time by not having to make snippets of each page and copying before printing. Thanks!

Question: from slindgren97 about the Trebuchet experiment :

Hi:) I need help with the math on the worksheet unfortunately! Do you have somewhere you walk us through this? Also, with the rest of the math in the other experiments, do you usually go through it with the students? Thank you!

Question: from lievekamholz about the Drop Rocket with Launcher experiment :

I can't find the 3/16 inch brass tubing to complete this project. Please advice.

Question: from aberry24 about the Introduction to Kinematics experiment :

Hi. I am reviewing this program to try and decide if it is right for my kids this year. So far I'm loving it. I have a 10th grade daughter I'm considering having start with physics. In the high school classes do they start with an experiment? I've watched the videos on scalers and vectors and the next one. Do they just click through and watch the videos and take notes? Also, when I click on the kinematics problem set, it only shows me the problems with the solutions.

Question: from jennifer_comito about the Hot Ice Sculptures experiment :

hey did you know you can super freeze water and slowly pour it on an ice cube and it will freeze just another way to do this!

Question: from jennifer_comito about the Introduction to Creating a Homemade Weather Station experiment :

Hey I'm working on a weather station in our sun room any tips? Also I'm not good at predicting the weather so how do you tell when it will snow, rain, storm or be sunny?

Answer:  Flashing Circuit

It sounds like you’re applying too much current to your circuit during testing. Go slowly and watch the video, and notice that I ask you in the video to recheck the wiring BEFORE ever connecting the battery, so you should not have exploding electronic parts.

Answer:  Getting Started With Digital Logic 1

What specific problems are you having with the videos? Can you take a screen shot and send it to me so I can see exactly what is going on? [email protected] (Is there a black box and no play button, or does it look like a player but doesn't play when you click on it...??) Let us know so we can help you! And it sounds like you're applying too much current to your circuit during testing. Go slowly and watch the video, and notice that I ask you in the video to recheck the wiring BEFORE ever connecting the battery, so you should not have exploding electronic parts. You'll find over 200 electronics projects in Unit 14 - let me know which ones you like best!

Question: from Johanijfick about the Flashing Circuit experiment :

my light emitting diode EXPLODED! I think it was the amp level.

Question: from Johanijfick about the Getting Started With Digital Logic 1 experiment :

Hi Im'e having some problems to play the videos. con you help me? PS: please give me some hard experiments the other ones were way to easy but please no capacitors in it (sometimes they explode)

Question: from violet639 about the Flying Over the Earth at Night experiment :

I should fly around the earth one day.

Question: from violet639 about the Flying Over the Earth at Night experiment :

Wow! That's a VERY cool video.

Question: from violet639 about the Inclined Plane experiment :

I know inclined planes. They're ramps.

Answer:  TaaDaaaaa!!!

Oh no! That doesn't sound right. I'll look into it and see what's going on. In the meantime, if you have issues like this, just send me an email so we can get right on it to make sure everything is working properly.

Question: from violet639 about the TaaDaaaaa!!! experiment :

This is one of my favorites!

Question: from violet639 about the Chicken and the Clam experiment :

Cool!

Question: from violet639 about the TaaDaaaaa!!! experiment :

Really simple.

Question: from violet639 about the TaaDaaaaa!!! experiment :

You know, I don't know why, but for 2 days, I couldn't comment. It said I had to be logged in to post a comment. I was already logged in. I clicked the link and even clicked remember me. I tried it twice and it wouldn't let me comment. Why is that?

Answer:  Fuel Cell Power

That's correct: an outside power source performs the electrolysis of the water which separates oxygen and hydrogen to power fuel cells. However, fuel cells have many advantages. They are a very clean and efficient source of energy, very reliable, lightweight, and long lasting.

Question: from jaylindberg1 about the Fuel Cell Power experiment :

This fuel cell still relies on another power source to work (the solar cell or battery) so whats the point in even having them? Why not just use the solar energy alone?

Answer:  Science Equipment: How to avoid being ripped off

Thank you for letting me know. It's hard to keep up with broken links when folks keep changing and updating their page urls! I've fixed these, so go ahead and refresh the page and try again!

Question: from msgulay about the Science Equipment: How to avoid being ripped off experiment :

The link for the Binocular, Telescope O-III filter and laser finder does not work.

Answer:  Meteorites

Oh no! There are other reputable places to purchase meteorites from - several good geology shops will have these for sale with certification.

Question: from msgulay about the Meteorites experiment :

Thank you! Just checked and NASA Space shop is out of stock on the $29.99 meteorites. I guess we'll have to wait till the next meteor impact on earth. lol

Answer:  Reading about Airplanes, Storms, and Bernoulli

The Bernoulli effect is still commonly taught as a part of flight theory. There are experts who say it's flat wrong and those who think it's a contributing factor in combination with other effects: Bernoulli and Coanda and Newton...oh my! :)

Answer:  Magnetism

I'd recommend purchasing a gem certified by the Gemological Institute of America. You can read their guide on moldavite here: https://www.gia.edu/gems-gemology/spring-2015-gemnews-moldavites-natural-fake

Answer:  Meteorites

Yes you can by them directly from NASA! https://www.thespaceshop.com/mefr3paco.html

Question: from msgulay about the Magnetism experiment :

Hello Aurora, I can't remember which video it was when you mentioned having a Moldavite ring. Is there a specific company you can recommend where we can get a moldavite specimen from to add to our Geology rocks/minerals collection? I read a few articles about how there have been lots of fake moldavites being sold in the market. And is there a way to test it and see if it is genuine or not?

Question: from msgulay about the Meteorites experiment :

Can you pls. recommend a website or a store we can buy these various rocks including an actual meteorite from? We would love to own an actual meteorite!

Answer:  Measuring the Speed of Light with a Chocolate Bar

Light travels in waves. The wavelength would be the distance between two peaks of a particular frequency. Microwave wavelengths are long compared to the range of visible light wavelengths that we can actually see.

Answer:  Bat Kite

Yes, humidity can be an issue! Not only does the air get "heavy" and really dense with water vapor, but the paper absorbs the water which makes the kite heavier. It sounds like your solution helped at least a little bit!

Answer:  Chicken and the Clam

Try different cans and note what happens. Absolutely try different blocks and see if it makes a difference. Change just one variable at a time so you can keep track and let us know how it goes!

Question: from abigail_shafer about the Bat Kite experiment :

SO, we ran into a little issue with this. We live near Houston, its summer, its been raining, ITS HUMID!!! We added a few pieces of tape to the inside and outside of the wing to give it more structure and keep the moisture from just collapsing the paper.

Question: from violet639 about the Measuring the Speed of Light with a Chocolate Bar experiment :

That's cool! But what does wavelength mean?

Question: from violet639 about the Chicken and the Clam experiment :

One more thing. Like say that the chicken noodle soup wins, and the tomato soup loses. Do you think that adjusting the size of the mega blocks ramp could possibly make the tomato soup catch up?

Question: from violet639 about the Chicken and the Clam experiment :

What if you substituted both cans? Maybe we could try chicken noodle soup (my favorite soup!) and tomato soup. Also, could you use mega blocks?

Question: from violet639 about the Play With Your Food experiment :

Cool! I didn't try it yet. I don't know if there's a scale. I'll have to ask my mom first.

Answer:  Sky in a Jar

Yes!

Question: from violet639 about the Bouncing Magnets experiment :

Cool! It's as if the magnets are floating on their own! :)

Question: from violet639 about the Sky in a Jar experiment :

Also, the liquid kind of looked yellow in the video. It looked like lemonade a little!

Question: from violet639 about the Sky in a Jar experiment :

Cool! Now, I live in a city. I think I'll have to shut all windows and turn out all the lights, right?

Question: from saturn about the Reading about Airplanes, Storms, and Bernoulli experiment :

So it is my understanding that the Bernoulli effect, while present, actually has very little influence on the lift of airplane wings and that the primary reason airplanes stay in the air is that the wings deflect the air downwards resulting in an equal and opposite force upwards. I refer to a NASA site on flight, and some others....Can you clarify this? Thanks- Sarah May-Anderson, PhD https://www.grc.nasa.gov/WWW/k-12/airplane/wrong1.html https://physics.stackexchange.com/questions/290/what-really-allows-airplanes-to-fly

Answer:  Circular Motion

We used 10 balls (not 20) :)

Answer:  Look Out Below!

In the case of the plastic bag, the force of air resistance (friction) is so strong and working in the opposite direction of the force of gravity. So the bag doesn't accelerate all that much and its velocity stays fairly constant. So it takes a relatively long time compared to the other options, which have less air resistance.

Answer:  Blow Gun Rocket

Very cool!

Question: from violet639 about the Circular Motion experiment :

Wait a minute. Why should it be 10 instead of 20?

Question: from violet639 about the TaaDaaaaa!!! experiment :

You know, I will try that. We'll have to buy eggs at the store first though. For now I tried only using a toilet paper tube, a book, and an eraser. You know what happened? The eraser didn't make it. I need help! Gabriel

Question: from violet639 about the Look Out Below! experiment :

How could the plastic bag take forever?

Question: from jennifer_comito about the Blow Gun Rocket experiment :

I made a cool car rocket launcher. It fires a small toy car

Question: from maryannpalko about the Simple Pulley Experiments experiment :

We had the same problem with this experiment, as did others, specifically needing more coins added to the lift in order to get the load up. When it did move up, it moved all the way to the top of the pulley. Even when we tried to gently tugged on the string, results would vary (the load/lift) would remain exactly where we let go of the string. Please explain. And for the answer given above regarding the response,"mastering 2nd year engineering students," could you please expand. Thank you

Answer:  Why bother with seat belts and helmets?

Hmmm - what do YOU think?

Question: from violet639 about the Why bother with seat belts and helmets? experiment :

why use a liscenced driver

Answer:  Speed and Velocity

The exercises are the last link in the navigation on the right hand side of the page. Here's a direct link: http://www.sciencelearningspace.com/premiumcontent/docs/Ch1-1D-Kinematics-1-StudentWorksheet.pdf