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 bac051201 about the Inside Gold experiment :

perfectly balanced, as all things should be- thanos

Question: from Aurora Lipper about the Cool Milk Trick experiment :

Dairy works best for this experiment :)

Question: from stillerholman about the Cool Milk Trick experiment :

can you use non-dairy milk?

Question: from bac051201 about the Special Science Teleclass: Black Holes experiment :

I used a basketball and a football

Question: from marie_cortez about the Can a Battery Be Used to Store Energy? experiment :

Hi there. I am asking my son to document his experiments by listing the usual: - Question - Hypothesis - Materials - Procedure - Results - Conclusion Can you tell me how this experiment answers the question - Can a battery be used to store energy?

Question: from ksls185 about the Conversion Charts experiment :

Do you have a conversion chart for Elemental Science biology for the Grammar stage? TOC: http://d3r1z7wkgqhj9d.cloudfront.net/BGS%20sample.pdf Thanks!

Question: from robertdangelo about the Terraqua Column: How does water affect land and animals? experiment :

Hi Aurora, it's Andie. I have built three terraqua columns -- salt water, control and a calcium chloride one. I learned that calcium chloride is extremely dangerous for plants. When I told my father how much calcium chloride I put in the water, he told me it was too much (he double checked this with math). However, even though the plant inside the terraqua column should be dying, it is actually growing!! Also, a different weed and grass are both growing in the calcium chloride column. Please explain this. Thanks, Andie

Question: from kathmacgall about the Recent Astronomical Events experiment :

Wow! But how did they get the close up of the comet fragments when they were flying by in the beginning of the video? and why is Jupiter spinning so slowly while the comet fragment are going really fast?

Question: from bac051201 about the Quantum Mechanics: Double Slit Experiment experiment :

what would happen if there were 3 or 4 slits what if there were an immense amount how would it change

Question: from Aurora Lipper about the Terraqua Column: How does water affect land and animals? experiment :

Hi Andie! Anything that's dissolved in the water should be wicked up along with it. Give it a test run and see what happens :)

Question: from robertdangelo about the Terraqua Column: How does water affect land and animals? experiment :

Hi Aurora, it's Andie! I crafted two terraqua columns; the water in one of them being salt water. I have a question though -- will salt water travel up a wick AS salt water, or will the salt be left behind and only water goes through? Thanks, Andie

Question: from allisonbwillis about the Shopping List for Unit 1 experiment :

I have some small boat rocker switches from a eudax kit. Will these work for the hovercraft? Also, can I solder wires to 9V battery instead of purchasing the battery clip? How does RPM of motors in hovercraft project affect its success? Thanks!

Answer:  Steamboats

I think it was 3/8" ID.

Answer:  Recent Astronomical Events

That's a real video... cool isn't it?

Question: from jamallwh about the Steamboats experiment :

What is the diameter of the tubing in the video?

Question: from kathmacgall about the Recent Astronomical Events experiment :

Is the above video of jupiter real or computer graphic imaging? Was the video of the suns corona on an earth based telescope or on a satellite? If the telescope was earth based how we're they able to film the sun for several days strait with out the sun setting? And if it was on a satellite how did the satellite maintain a steady shot while it was flying through space? what was the name of the telescope/satellite?

Question: from bac051201 about the Basic Fundamentals experiment :

oops. i meant AA.

Question: from bac051201 about the Basic Fundamentals experiment :

I have seen a similar reaction, however, you are supposed to place 3 AAA batteries in water for an hour and you will supposedly be able to light the water on fire. is this the same reaction?

Question: from Aurora Lipper about the Good Old Telephone experiment :

Good suggestion!

Question: from bac051201 about the Good Old Telephone experiment :

is fishing line a possibility

Question: from Aurora Lipper about the Aurora's LEGO Robots experiment :

The original RCX firmware was on a CD-ROM. I am not sure if it's available for download anywhere or if you can still purchase a disk. Have you contacted LEGO?

Question: from jamallwh about the Aurora's LEGO Robots experiment :

Do you remember how to download the firmware?

Answer:  Build and Fly a Real Alpha Rocket

Unfortunately, no - the rocket is something you have to purchase separately. Not everyone is able to launch rockets in their area, it's something you have to get special permission for.

Question: from Aurora Lipper about the Aurora's LEGO Robots experiment :

The command to upload is nqc -firmware firm0332.lgo from here: https://pbrick.info/rcx-firmware/ Does this help?

Question: from Aurora Lipper about the Drop Rocket with Launcher experiment :

It all depends on the launch angle! Give it a try and report your results :)

Question: from jamallwh about the Aurora's LEGO Robots experiment :

Can You teach me how to download The rcx firmware?

Question: from jamallwh about the Build and Fly a Real Alpha Rocket experiment :

Does the diamond program come with this kit?

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

How far does this rocket fly

Answer:  Aurora's LEGO Robots

I wish I had taken a video of how I created these back then (I think it was about 20 years ago!) I am sorry I don't have instructions to share with you... maybe you can figure out something from the photos?

Question: from jamallwh about the Aurora's LEGO Robots experiment :

can you please tell me how to make the 12 legged robot out of Legos

Question: from Aurora Lipper about the Speed and Velocity experiment :

Thanks for the update!

Question: from Ramalogos about the Speed and Velocity experiment :

Every thing is working fine now. Don't know what happened.

Question: from Ramalogos about the Speed and Velocity experiment :

A little problem...When I try to go back a little to hear you or see what you wrote, it jumps way forward, then I have to start all over again just to get to the part I need to hear/see again.

Question: from Aurora Lipper about the Calorimeter experiment :

T is the temperature and delta (the triangle symbol) T is the change in temperature.

Question: from Aurora Lipper about the Terraqua Column: How does water affect land and animals? experiment :

You want to be sure plenty of light gets through, so clear would be best! It would be a great bonus experiment to try a clear one and a green one to see what differences you note.

Question: from 5hikingup about the Terraqua Column: How does water affect land and animals? experiment :

Will using a sprite bottle (meaning that the plastic is green and not clear) make a big difference other than not being able to see as well?

Question: from Aurora Lipper about the Water experiment :

You can change one variable at a time to see which one helps. What happens if you wait less time? Does that make a difference? How about adding less salt? Be sure to report back to let us know how it goes!

Question: from bac051201 about the Calorimeter experiment :

why did you use capital t throughout the video? I thought that meant temperature. or did you mean the change in temperature, not time?

Question: from Aurora Lipper about the Aurora's LEGO Robots experiment :

Sure! You'll need to start with the fundamentals if you've not had circuitry lessons, those are here: https://www.sciencelearningspace.com/study-units/unit-10-electricity/lesson-1-circuits-components/ and then you can move on to our robotics lessons here: https://www.sciencelearningspace.com/study-units/unit-10-electricity/lesson-2-robotics/

Question: from jamallwh about the Aurora's LEGO Robots experiment :

Can you please tell me how to make the 12 legged robot with two motors?

Question: from amberrnelsen about the Water experiment :

Our jar of water keeps freezing before we take it out. Do you know why it could be freezing instead of supercooling? We've tried it a couple times but each time the water is already freezing into crystals before we go to take it out.

Question: from frauritsema about the Basic Circuits experiment :

Thank you for your help!

Answer:  Basic Circuits

No problem! When I started, I only had a battery, rubber bands and paperclips for my homemade "battery holder" and I made my own alligator electrical wires from aluminum foil and masking tape! It's hard to say what's going on without actually *seeing* your experiment. You can send me images to my email at [email protected] If you're not sure of the minimum voltage requirement is for the LED, then you'll want to hook up the batteries plus-to-minus, not plus-to-plus, so the voltage increases. You can check out the experiment on "Series and Parallel Circuits" to help guide you through when you should use each configuration. I recommend using those cheap "dollar store" type of batteries (listed in the shopping list) so your batteries have the least chance of exploding, because you're right - if you hook them up the wrong way or with too many other batteries, you might have a problem.

Question: from frauritsema about the Basic Circuits experiment :

Howdy, We were working on this experiment and couldn’t get it to work (we didn’t have a battery case and use electrical tape instead and the LED might have too high a voltage). Anyway as we were troubleshooting I came across the idea of having the wire attached to the battery go across two ends of the same polarity (thus using four batteries). I wasn’t able to do it at my house because I’m not sure whether or not it would, for instance, cause the battery to explode, so I wanted to ask you what would happen if you had the metal part of the wire lay across two batteries? Would it increase the voltage? Ps we ARE getting a battery case and Lowe voltage LEDs... we just got abit excited!

Answer:  Pop Rockets

Take a look at the projectile motion equations on page 3 of the worksheet download. Which equation has only one unknown that you can solve for? (Hint - you may have to put two together if you don't see one that works straight off the bat.)

Answer:  Equations for Circular Motion

Let's see: J = N m and N = kg m s-2 So here's the way we usually write it: 6.67408 × 10-11 m3 kg-1 s-2

Question: from trish_chapman about the Pop Rockets experiment :

I don’t know what equations to use for the frog problems 1 and 2.

Question: from bac051201 about the Equations for Circular Motion experiment :

would the gravitational constant also be able to be written as 6.67*10^-11 joules^2 over kg^2?

Question: from lesheadrick about the Plasma Grape experiment :

super coooooooool !!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer:  Can Insulation Save Energy?

I would try all sorts of things, not just a cooler or a bag. For example, what kind of bag? Brown paper lunch sack, grocery bag, cloth, or thermal bag? A good scientist is always asking questions and then designing experiments to answer those questions. Do let me know what you find out! (Maybe there's a good reason people use coolers instead of bags?)

Question: from apbaine about the Can Insulation Save Energy? experiment :

Hi Aurora, I was wondering if the cooler can be a bag. Thanks - Sophia Baine

Answer:  Newton's Second Law of Motion

Yes, you're right! The energy went somewhere, and with a squishy foam ball, it goes into the squeezing the ball. Try something harder, like a bouncy ball.

Question: from mrsrohland about the Newton's Second Law of Motion experiment :

It works! We try a foam ball---and it didn't work. We think it is absorbing the momentum???

Question: from heidi_newman270 about the Sea Angel: Is it real? experiment :

They are so small They eat sea snails I think it's so cool that they are both genders

Question: from karenketzner about the Electrolysis experiment :

We did fill the tube attached to the negative terminal with hydrogen as confirmed by the popping. No gas was at the positive terminal (no fizzing, bubbles, or water displacement). We repeated the experiment a second time with the same results. We used the alligator clipslike in the video set up inside the tubes. We even tried a third time with table salt that time, still with only hydrogen present in the test tube attached to the negative terminal. No gas formed in the other test tube. We tried using a different snap on clip to the 9 volt battery each time, with different alligator wires each time.The solution was a dark greenish/blue after removing the test tubes. Would 2 double A batteries work bettter, or should we try different electrodes or tape wires directly to the battery instead of using the clips? We tried 2 different new 9 volt batteries, as well as different alligator clips each time. Thanks!

Question: from robertdangelo about the What do you think? I need your input! experiment :

We homeschool . . . "What's great"?? . . . Your unbridled and contagious enthusiasm for science. Distilling complex subjects down to simple easy-to-understand explanations and analogies with illustrating experiments. "Be even better"?? . . . Not sure. Your program is pretty good already. "How do we use" ?? . . . We have two dedicated science days a week. We skip around subjects a bit based on interest opportunities that just kind of come up as a result of going through life and observing. My daughter "Andie" (she writes you a lot) is now eleven years old and is doing middle/high school level work. She has a profound interest in science, therefore I do not need to get her attention. We prefer the meatier, less showy/less playful experiments. We continually miss your special "live" presentations, which always seem to fall on Wednesdays at noon Pacific time. We are never available that day, due to other obligations. Thursday and Friday are our "science days". How about replays?? My sincerest thanks and warmest regards -- Bobby D'

Question: from karenketzner about the Turning Copper Into Gold experiment :

That was a really cool experiment. Thanks!

Question: from jredwitz_ca about the Hidden Magnetic Fields experiment :

Unfortunately the student worksheet & exercises (which talk about creating a compass), do not correspond to the video or reading (which talk about magnetic field strength).

Question: from Aurora Lipper about the Black Hole Bucket experiment :

Yay! Thanks for the update :)

Question: from jma5447 about the Acids & Bases experiment :

cool

Question: from jenjar2001 about the Black Hole Bucket experiment :

Fishing bobbers and weights. I found some today at a Fishing supply store. Thanks!

Question: from Aurora Lipper about the Black Hole Bucket experiment :

Is it fishing bobbers that you're looking for? If so, they look like this and you can find them locally at sporting good stores.

Question: from jenjar2001 about the Black Hole Bucket experiment :

I really want to do this experiment. I’m having trouble finding round, coated fishing weights . Suggestions for other materials to use or places to find them?

Answer:  Burglar Alarm Activated by a Pressure Sensor

Wow - that sounds interesting! Can you send me a picture? mailto:[email protected]

Question: from Aurora Lipper about the Electrolysis experiment :

Can you tell me more details about your setup for the experiment? What kind of power did you use (and how much?), what did you use for electrodes? Also, what was in the solution (amount, etc.)? Thanks!

Question: from serenamae4 about the Burglar Alarm Activated by a Pressure Sensor experiment :

Tried the burglar alarm and for some reason, the light came on when the close pin was open and off when the tacks touched. Don't have any idea why that happened!

Answer:  Rotating Candles

Update - they didn't move it.. it still works! It took a long time for the video to start, though. Try clicking on the video itself while it's "spinning" - that sometimes works to bump it so it starts playing.

Answer:  Rotating Candles

That's strange - the video should be unlocked for everyone, since it's from MIT. Let me see if they moved it again.

Question: from bac051201 about the Rotating Candles experiment :

I have the same problem as Karen Daley. I don't know if I don't have access to this content, but I can't watch the video

Question: from karenketzner about the Electrolysis experiment :

We added 1 TB sodium sulfate to 100 ml of distilled water. The sodium sulfate immediately formed a hard plate on the bottom of the beaker like Shannon Reiter’s comment. We poked at it with a stirring rod for 15 min, and it finally dissolved. Gas is only being produced at the negative terminal, and is only 1/3 of the way full so we haven’t tested it. Do you know why there is no gas being formed in the other test tube? We used the alligator clips from the electricity pack and the battery clip from chem 3000. Thanks!

Answer:  Hovercraft

I've send you a private email. So happy for you and your newborn!!

Question: from victoriahanline about the Hovercraft experiment :

Hi Aurora! Thanks for posting such a fun project! Do you have a place in your shop where you sell the parts for this Hovercraft in one package? I would be more than willing to pay for your time to gather the pieces and the postage to ship. I am at a funny stage right now (newborn and schooling lots of ages) and trying to find all the parts is posing a bit of a challenge. Please let me know! Thank you in advance for your time! Victoria

Answer:  P-Shooter Launcher

Thanks for your email - I've written up my own solution to this problem which you can download here.

Answer:  P-Shooter Launcher

Sorry you are having trouble! Can you send me a photo of the work you've done so I can point you in the right direction? Email me directly at: [email protected]

Question: from jkptexan5 about the P-Shooter Launcher experiment :

Hello, we worked for over 30 minutes on question 3 for the advance student P-shooter Lab and could not figure out which formulas to use to come up with the answer given. Can you help us with this?

Answer:  Mixing Colors

Red and green LIGHT make yellow, just like in the video. What color did you get with orange and green?

Answer:  Lava Lamp

Not without adding an external heat source. You need something to keep the reaction going so the liquids stay in constant motion. This experiment is just for demo so you can see different liquid densities and how they interact.

Answer:  Atomic Facts

Thanks for letting me know - I appreciate it. It's really important to me that my website is a safe and open place for kids to ask their science questions. Let's try again!

Question: from mirzamediha about the Mixing Colors experiment :

we tried orange and green, is that the right combination to get yellow?

Question: from bac051201 about the Lava Lamp experiment :

is there a way to make the lava lamp reusable so you don't have to keep adding salt

Question: from bac051201 about the Atomic Facts experiment :

I would like to apologize for my stupid comments about blowing things up it won't happen again

Answer:  Bow and Arrow Problem

This is in the High School section where we are talking about different forms of energy. The bow and arrow is just an example to illustrate the concepts. Did you mean to access the site from the High School section? None of our videos should be mis-labeled. If you find one that isn't right, do let me know asap so I can fix it. I'll look into this one later today.

Answer:  Special Science Teleclass: Solar Astronomy

Awesome that you are star gazing! And yes, this sort of thing happens all the time. That's actually what hooks a lot of astronomers to keep at it until they find it. My guess is that either your scope wasn't aligned properly, or that you didn't have the right numbers at the right time (since planet position changes rather quickly over the course of the night). You can use "Stellarium" to help you figure out where to point it and be sure of what you're looking at. Here's a direct link (it's free) - you can put it on your phone as well to use outdoors to help you align your scope. https://stellarium.org/ That's the free option. The other way is to "star hop", which means you find something you know for sure what it is, then hop over to something new and verify it. Here's a couple of resources for how to do this: http://www.nightskyinfo.com/star-hopping/ https://earthsky.org/tonight/star-hopping-from-constellation-orion

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 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 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