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 shickey7 about the Special Science Teleclass: Solar Astronomy experiment :

hi

Question: from bac051201 about the Bow and Arrow Problem experiment :

what did this have to do with a bow and arrow? sorry if this is another mislabeled video

Question: from bac051201 about the Bomb Calorimeter experiment :

hello? can you hear me major tom?

Question: from bac051201 about the Play With Your Food experiment :

cool very cool but when can I blow things up

Question: from bac051201 about the Pile It In experiment :

jig

Question: from bac051201 about the Pile It In experiment :

gjtkgtklgfld

Question: from robertdangelo about the Special Science Teleclass: Solar Astronomy experiment :

Hey Aurora, it's Andie. Not that this is related to the subject of this page, but I have a Celestron C8+ with an equatorial mount. Last night my dad and I were trying to find mars, but when we put in the correct right ascension and declination along with the correct hour angle, mars wasn't there. Do you have any advice on this? Thanks, Andie

Question: from bac051201 about the Bomb Calorimeter experiment :

heh? heh? PLANT?

Question: from bac051201 about the Bomb Calorimeter experiment :

where's the bomb?! I was going to plant it in my brothers' room!

Question: from bac051201 about the Plasma Grape experiment :

aw man! my microwaves new and my mom probably wouldn't let me

Question: from bac051201 about the Elastic Collisions experiment :

;););)ok

Answer:  Elastic Collisions

The previous video in this sequence also involved looking at different time intervals. I must have misspoken about the "last problem" - not sure which one I had shot before this one. Just ignore it! :) I had to create 500+ videos for this section, so you may find little errors like this in terms of where they got moved in the sequence. Everything should be logically laid out and accurate in terms of science. :)

Answer:  Tracking your Treads

Oh, no! Thanks for letting me know. I am updating all the shopping lists soon, so I'll put this correction on the list also. So sorry about that!

Answer:  Acid Test

Sometimes vinegar isn't strong enough (I have found out that it can vary between 2.5-4.5 pH), which is why we use the diluted HCl, but this isn't something we want you to work with. There are other ways of testing the rocks. Is it just the limestone that you are trying to find? If so, you can leave it overnight in a cup of vinegar and compare with in the morning to see if there are any bubbles on the surface. Tkae a photo just after you drop it in, and then again in the morning to compare.

Question: from bac051201 about the Elastic Collisions experiment :

this video has a reference to a "last problem". is that supposed to be what the mislabeled video is???

Question: from Nhasan112 about the Tracking your Treads experiment :

Hello. FYI: the Protractor is missing from the list of materials. We didnt realize until we gathered everything else and started to do the experiment.

Question: from jennifer_rice about the Acid Test experiment :

I have the Washington Student rocks and minerals bag but I am having trouble identifying the minerals in the bag. I have used the field guide but still don't feel confident that I am using the correct minerals. My rocks didn't react at all when I applied the vinegar. Do you have any suggestions on how I can accurately identify the minerals? Thank you! Abigail

Question: from cndbil about the Constant Acceleration experiment :

Thank you. I see it now. Yes we are doing the HS side

Answer:  Soccer Ball Science

Great job figuring out what happened! That skill is going to go a LONG way in science... keep up the good work! (Did I mention that a lot of what we do in science is figure out what went "wrong"... e.g. "differently that we expected"?)

Answer:  Constant Acceleration

That lesson is posted in two places. I noticed you've accessed it from the HS side, so the answers to the questions in the worksheet download are on the last page. If you meant to access it from the K-8 side, the answers to the questions are here: https://www.sciencelearningspace.com/category/topics/unit-2-mechanics/lesson-2-acceleration/acceleration-exercises/

Answer:  P-Shooters

The question is asking how fast did the ball have to be moving in order to get that high? We can't really measure the height accurately or easily, but we can measure time. By timing how long it takes to go up, turn around and come back down, we can figure out how high it had to go, and then figure out how fast it was going to get that high. We can do that all with one projectile motion equation. The equation included is a standard projectile motion equation you'd find in any typical physics textbook, where "f" stands for "final" and "i" stands for "initial". The "v" stands for "velocity" and the "t" stands for "time". The "a" stands for "acceleration" and is a constant value of 9.8 meters per second2 for freefall motion. When we do these types of calculations, we look at just the horizontal component or just the vertical component. When we just look at the vertical component, the ball goes up and then down. So vf means the final velocity (which is zero when it hits the ground - it is no longer moving and doesn't have any velocity. We don't always know how the equation will look with every problem, so we have to start with the main equation and then simplify it from there. (There's a video that explains all the letters and how to use the equation in the Projectile Motion section of the HS level Advanced Physics. I've included this lab for lower level kids because it's a lot of fun to do!)

Question: from jakebrown518 about the P-Shooters experiment :

We are not understanding what the values represent in the equation. Please explain. Is M/S Meters per second? V is obviously Velocity, but what are the sub letters? Why is the formula so complex if it is simply 9.8 X the recorded time/2?

Question: from Aurora Lipper about the Turning Water into Wine experiment :

No, it's never safe to drink something you've made in a chemistry experiment!

Question: from Aurora Lipper about the Zinc Dust experiment :

I am sorry you're having trouble with this! It sounds like there might have some kind of contaminant involved with your process. In any case, there's not an effective way to remove the material from the spoon short of an industrial solvent. It would be best just to discard it and start with a new one.

Question: from themorozovs about the Turning Water into Wine experiment :

Can I drink the yummy

Question: from cndbil about the Constant Acceleration experiment :

Hello. I have the same question Kimberly did. I cannot seem to find the solutions to the Acceleration problems. Please tell me where to look. Thank you

Question: from bac051201 about the Soccer Ball Science experiment :

I'm soooooo sorry!! I had entered it as only sin 38* was over 9.81. oops. ;);)

Answer:  Microscope Lab Introduction

There's an assortment of recommendations in Unit 16 under "Microscope Materials". The bottom LED is a must, and in the past, I've used a flashlight for top illumination at this stage (you'll need something better for college of course). Can you send me a link to the binoc one? I am very curious!

Answer:  Soccer Ball Science

If you're still stuck, send me a picture of your calculations to [email protected]

Answer:  Electric Eye

Did you get it to work? I wasn't sure by your comments which experiment you got to work... :)

Answer:  Ideal Gas Law

Yes, that's right! When a balloon decreases in pressure (the air rushing out), the temperature also decreases. Like an aerosol can - the contents inside go from high to low pressure, and then there's less stuff inside the can decreases the pressure more, which also decreases the temperature. If you hold your hand on the outside of the can as you quickly release the stuff inside, you'll feel it getting colder!

Question: from tntmnm about the Ideal Gas Law experiment :

Does the gas law explain why a balloon feels colder right after all the air has rushed out?

Question: from bac051201 about the Soccer Ball Science experiment :

is my calculator busted??? I got that sqrt 30 sin 38*/9.81^2 = 3.397....; so why did I get a different answer

Question: from bac051201 about the Using Trigonometry with Physics experiment :

I can finally post comments!!!!!!!

Question: from apbaine about the Electric Eye experiment :

YAY! I GOT IT TO WORK!

Question: from apbaine about the Electric Eye experiment :

My DMM isnt showing any Ohms.What do you suppose i do? (Ian) (9)

Question: from apbaine about the Dimmers and Motor Speed Controllers experiment :

Yes.I set the dial to Ohms,but still no reading.Is the pencil graphite supposed to do any thing? Thanks Aurora (Ian) (9)

Answer:  Dimmers and Motor Speed Controllers

Are you at the part where you're measuring the resistance of a line drawn on the paper? If so, the DMM needs to be set to measure resistance (ohms).

Answer:  Special Science Teleclass: Rocketry & Spaceflight

Have you seen SpaceX's landings? https://www.youtube.com/watch?v=vr_C6LQ7mHc They use rockets to guide it back to earth to land.

Answer:  Introduction to Kinematics

It's probably going to be a couple more months... the new website is built but we're still having weird issues like not being able to log in.

Question: from sonmc132 about the Microscope Lab Introduction experiment :

Hi Im looking for a microscope for my son. I have come across one that has binocular lenses with top and bottom LED to allow for translucent bio samples and low magnification and I was curious if this would be better to get than just the bottom LED? Thanks

Question: from laurieannema about the Zinc Dust experiment :

I did this experiment with Home Science Tools zinc powder. At first I did it over the alcohol burner on a stove top with the fan on high, but after at least seven minutes of no color change in either the zinc or the flame, I switched to the stove's burner. I tried that for several minutes, but without any visible change. Finally, I decided there must be something wrong with my Zinc and stopped. But after I let it cool and tried to throw it away, I discovered that the zinc powder had turned rock hard and fused to the spoon! It hadn't altered in appearance at all, no color change, no shrinking, nothing. I managed to scratch it a little with a tooth pick, but not enough to really get any out. This was the first time I used the spoon (from the C300 kit). Do you have any idea why this happened? And could you give me some tips on how to get it out of my spoon? Thanks.

Question: from apbaine about the Dimmers and Motor Speed Controllers experiment :

I'm working on the worksheet and I'm not sure what I should do with the pencil line. Do we have to hook up the wires to the paper? What is the correct way to do it? I am not getting a reading on my DMM. Ian (9)

Question: from kathmacgall about the Gyro Wheel experiment :

Thanks!

Question: from victoriahanline about the Special Science Teleclass: Rocketry & Spaceflight experiment :

Hello Mrs. Lipper I was wondering how the rocket lands with out a parachute. Can you explain, please?

Question: from weiland54 about the Introduction to Kinematics experiment :

I understand that you are currently working on making the Physics more user friendly but I was just wondering if you could give me a time frame for when to expect it. I'm excited but tired of checking every day.

Question: from Aurora Lipper about the Gyro Wheel experiment :

This is due to many factors. First, it's important to note that the camera "sees" things drastically differently from our eyes. Even the best camera will distort what is photographed, at least to some degree. The different cameras do have an impact on different looks of continents, colors, haze, etc. Also, these images are shot from vastly different angles, through windows with different refractive index and/or curvatures, with different film or different digital equipment. Some images we see are actually stitched together from many different shots. So yes, there are many explanations for sizes of continents appearing to change. The most likely reason would be that the shots are taken from different angles and distances from Earth. I hope this helps!

Question: from kathmacgall about the Gyro Wheel experiment :

Thank you for the information! I was also wondering why is it that in the pictures released by NASA over the years the size of the continents appear to change. is it because they use different cameras or is it something else?

Question: from Aurora Lipper about the Gyro Wheel experiment :

Hi there, Earth is an oblate sphere, so it's slightly squashed. However, to the naked eye it appears to be round in videos and photos. If you measured or used a compass, you'd discover anomalies that deviate from a perfect sphere. Regarding mechanical gyroscopes: they do need to maintain their orientation relative to their beginning orientation. To compensate for this, early gyroscopes required regular manual adjustments. I hope this helps!

Question: from Aurora Lipper about the Detonating Bubbles experiment :

You can check out our supply lists here: https://www.sciencelearningspace.com/category/shopping-list/unit-8-shop-list/ and here: https://www.sciencelearningspace.com/category/topics/shopping-list/unit-15-shop-list/ Many items will have shopping links, but please just let us know if you have difficulty locating anything specific.

Question: from wheresbo about the Detonating Bubbles experiment :

How do I get all the supplies in chemistry?

Question: from kathmacgall about the Gyro Wheel experiment :

Hi Aurora! You mentioned that the earth is a slightly squashed sphere, my question is why all the pictures from space show the earth as a perfect sphere? At least the ones i have seen from NASA so far. why is that? Also i have been wondering how do air planes artificial (gyroscopic) horizons compensate for the curvature of the earth? Especially if there gyroscopes are mechanical and not electronic? I look forward to hearing from you!

Question: from Aurora Lipper about the Zinc Dust experiment :

It sounds like it didn't get hot enough. My recommendation would be to try again if you’re able for a longer amount of time.

Question: from jennifer_albertson about the Introduction to Kinematics experiment :

Three questions from the Student Worksheet for 1-D Kinematics #7- In the equation t= 5s x 1m/60s x 1hr/60m, t= 0.0022 but when we calculate this we are getting 0.00138 so why is this not rounded to 0.0014? #13 - We are confused why in the given that acceleration is -9.81m/s² but when it is used to find the final velocity it is no longer a -9.81, but is a +9.81. We have the same question in problem #10 as well, where the a= -32.2 in the given but is +32.2 in the final velocity. #14 In the third part of this problem when solving for distance the equation is d= Vi + 1/2at² however in the next equation when numbers are plugged in it says d= 34+1/2(2.5)(15.5) where is the square on the 15.5? It seems like it should be d= 34+1/2(2.5)(15.5)². Can you help us understand these problems please? Thank you

Question: from karenketzner about the Zinc Dust experiment :

We burned the zinc powder (not zinc oxide) over the flame for about 4 minutes and did not get any color change from yellow and back to white. How long do we need to burn it? We bought the zinc from Home Science tools approximately a month ago and used an alcohol burner. Did our flame not get hot enough? Thanks!

Question: from jma5447 about the Fire-Water Balloon experiment :

wow thats really cool

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: https://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: https://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: https://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]