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 glendawolfe54 about the Fourth of July Fun experiment :

Aurora, I was hoping we would be able to make sparklers? I wasn't able to access the site. Is there a different link that I am overlooking? Glenda PS. HAPPY 4TH

Question: from sudhee about the Cosmic Ray Detector experiment :

this is so good

Question: from ksoh about the Vector Notation & Trigonometry experiment :

Thanks, that was helpful!

Question: from tuhin_zaman about the Robot Cable Car experiment :

wow! we loved this robot and it was very simple, thank you!

Answer:  Electricity Shop List

I've sent you a private email!

Answer:  Vector Notation & Trigonometry

It depends on what you're doing - with physics, a = acceleration, while alpha (greek letter) = angular acceleration. Some greek letters always mean the same thing (like "pi" = 3.14159...) while others can be mixed around.

Answer:  Bouncing Magnets

Try it! What did you find out? How can you tell which end is N or S on a magnet?

Answer:  Bouncing Magnets


Answer:  Diamond Kite

Without seeing your kite in action, here's my best advice: The bridle may be too short or the tow line (the string connected to your hands) is not attached at the right point. The whole point of the bridle is to hold the kite at a certain angle to the flying line. This will affect how the kite flies (and if it flies at all). When you dangle the kite from the tow line, the nose of the kite will be above the tail. You want the nose segment shorter should be than the tail segment of the bridle. Typically the bridle will hold the kite somewhere between 15° and 35° above the horizontal (make sure the nose is up!) If the kite simply won't take off, the angle is too small, so you can shorten the nose segment or lengthen the tail segment of the bridle. If the kite shoots up but doesn't pull on the line and is unstable, the angle is too great. The length of the is important. How far from the kite is the tow point (the point where the bridle and the tow line are attached)? For diamonds, it should be as far from the face of the kite as possible (without getting tangled with the corners of the kite). Experiment and play with it until you get it to fly!

Question: from ksoh about the Vector Notation & Trigonometry experiment :

Are there any guidelines on what Greek letters to use in general? Or are they interchangeable?

Question: from amykweiss about the Electricity Shop List experiment :

Hi! I haven't purchased any of the materials for the Electricity labs, so I plan to put together an order from Jameco. It looks like quantities are specified for most of the items on your list, except LEDs. How many of these should I be getting? Also...are there other subject areas besides Electricity that require items from Jameco, so that I should be looking at those lists as well in order to just have one order instead of multiple? Or...are there just general things from Jameco that I should have lying around the house because I'll probably need them at some point? Thanks.

Question: from talaljabari about the Bouncing Magnets experiment :

ahhhhhhhh I've got the first magnet but I can't get the second one

Question: from talaljabari about the Bouncing Magnets experiment :

it should be north and north are facing each other to levitate right

Question: from talaljabari about the Bouncing Magnets experiment :

can they be round magnets

Question: from ksoh about the Introducing the Idea of Net Forces experiment :

Yes, thank you!

Question: from tabiantoun about the Diamond Kite experiment :

I made a diamond kite and it worked, and flew a bit in the wind, but it never stays in the air for long. It keeps coming down, and I already adjusted the bridle and added a tail. What do I do now?

Answer:  Four Fundamental Forces

Yes I think you're right! I wonder if it got switched with another post. Let me check...

Answer:  Introducing the Idea of Net Forces

Yes, gravitation, resultant "normal" force (counteracting the gravitational force), when I pull the rope one way with the left hand and the other way with the right hand, etc. When you add them all up (using vector algebra), if the sum isn't zero, it means the rope is moving. If the rope is still, like a bridge is standing still, then the forces are in balance and there is no NET force. Does that help?

Question: from MPKOZICZ about the Slide Preparation: Staining experiment :

I went to the beach and I saw a jellyfish

Question: from ksoh about the Four Fundamental Forces experiment :

This section looks a little mistitled. It says "Four Fundamental Forces" but looks like it's all about friction.

Question: from ksoh about the Introducing the Idea of Net Forces experiment :

What I mean is that are there any examples of forces acting upon the rope in the experiment, specifically, what forces there are and how they are affecting the rope.

Question: from joyinthejourney about the Rocket Car experiment :

I just built this without wheels and using a 16oz bottle. I shot it into the air like a rocket but found it only went up about 6ft. However me and my brother then decided to shoot it forwards... new invention-rocket gun!!! It dos'nt hurt but it does shoot good and is really cool! BTW 8-10ft range Enoch

Answer:  Fruit Battery

What an excellent question! I would get several pieces of the same fruit, in different stages from green to rotten, and perform the experiment to figure out at what stage of "ripeness" that particular fruit yields the highest about of current and/or voltage! Do let me know what you find out!

Question: from jeongseok_ha about the Fruit Battery experiment :

Can you use a rotten fruit?

Answer:  Foam Slingshot Rocket

Two different ways - you can cut out fin shapes from foam sheets and attach them with hot glue or masking tape, or you can put a wide piece of tape (like duct tape) and fold it back on itself the same way we did in the "Straw Rocket" experiment.

Question: from semberlee about the Foam Slingshot Rocket experiment :

How do you make fins for this slingshot rocket.

Answer:  Atomic Facts

Yes, that's what they do at CERN and SLAC - it's a huge linear accelerator that accelerates tiny particles near the speed of light aimed at the nucleus of an atom. You can read more about it here: https://www6.slac.stanford.edu/ http://cds.cern.ch/journal/CERNBulletin/2013/40/News%20Articles/1602220?ln=en https://visit.cern/tours/guided-tours

Question: from Jennifer Schreckhise about the Atomic Facts experiment :

Hi Mrs. Aurora, Is there ANY way to knock the protons and electrons off of an atom? That would leave the nucleus totally exposed, leading to some pretty wild experiments. Thanks! -Josiah

Answer:  Rocketships

I'll see if I can post a video right below the main video.

Answer:  Density

How hot did you get it? And how cold did you get it?

Answer:  Special Science Teleclass: Rocketry & Spaceflight

The answers are on the last page!

Answer:  Eyeballoon

It's about 50mm - there's a direct link on the shopping list in Unit 19. The balloon should be able to stretch to accommodate it? https://www.homesciencetools.com/search?search_query=lens

Answer:  Mixing Cold Light

Look in the shopping list - you'll find a direct link. https://www.teachersource.com/category/light-sticks

Answer:  Peanut Energy

So sorry! I'll have Tonya connect with you right away!

Question: from monique_collado about the Peanut Energy experiment :

Hi Aurora, I love this program you created and my children love to learn hands on. Thank you so much for your passion and clearly taught instructions. We are having one problem, my son is trying to do some experiments in his age range (10th grade), but it's saying that we're only in enrolled in K-8. I believe I signed up for both K-8 and 9-12. Can you help me please?

Question: from angela_holmes about the Mixing Cold Light experiment :

That's cool! But where can I get the glowsticks?

Question: from vinitayemul about the Rocketships experiment :

can you give me a video of the launch

Question: from tinafryar about the Eclipses and Transits experiment :


Question: from rikisasi about the Density experiment :

we tried the hot and cold swirl expirement TWICE and TWICE the hot and cold just immedatelly mix to make purple! why wont it work?!?

Question: from angela_holmes about the Eyeballoon experiment :

Hi! I was wondering how small the biconvex lens has to be? Because my mom ordered one from Amazon and it was too big.

Question: from gulnora12 about the Special Science Teleclass: Rocketry & Spaceflight experiment :

Hi Aurora, can you please post your worksheets with answers to these lessons as well, so we compare our answers with yours? Thank you in advance!

Answer:  Electric Spinning Flyer

Thanks for writing! I would recommend those inexpensive motors that are available int he summer as part of a "personal fan" - I got mine for $1 and it comes with motor, batteries, switch, propeller... all in one! Here's a picture of it: https://bit.ly/37H1SWY You don't have to but it from this link, just use it to look at so you can find one where you are. It can be challenging to remove metal gears that come press-fit onto motor shafts. You can make your own propeller from plastic lids from yogurt containers and then glue those onto the gear so you don't have to remove it first. Does that help?

Answer:  Special Science Teleclass: Astronomy

I've just checked it - the video is working fine. Try refreshing your page, and if that doesn't work, try a different browser or device. Did that help?

Answer:  Introducing the Idea of Net Forces

Tell me more about your question? I am not sure I am understanding what you are asking. The rope experiences the pull from both ends, and also it has weight but for our experiment we're ignoring the gravitational force.

Answer:  Planetarium and Star Show

As you go through the class, we talk about the different things outlined in the sheet. If you want a more detailed sheet, here's a similar video with an expanded worksheet: https://www.sciencelearningspace2.com/2019/02/special-science-teleclass-astronomy/

Answer:  Cobalt Colors

Good question! Try it and let me know what happens!!

Answer:  Planetarium and Star Show

I am not sure of your question - try asking again?

Question: from vinitayemul about the Electric Spinning Flyer experiment :

I do not have a propeller to use with Motor 451324. Can you please advise on what propeller I should buy? I do not have any toys with propeller that I can use. Also I am thinking about getting a motor with a gear instead of just a shaft. Can I remove the gear as needed or are those gears permanently attached to the shaft of the motor?

Question: from ksoh about the Introducing the Idea of Net Forces experiment :

Are there any other examples of forces that could act upon the rope in the experiment?

Question: from chaterbox86 about the Planetarium and Star Show experiment :

what is your theroy for that cloud?

Question: from mcman53 about the Elephant Toothpaste experiment :


Question: from mcman53 about the Cobalt Colors experiment :

Another idea: what if you just blow on it with your mouth?

Question: from chaterbox86 about the Planetarium and Star Show experiment :

Er.......... how to I fill in my sheet?

Question: from gulnora12 about the Special Science Teleclass: Astronomy experiment :

Hello, The video is no longer available :( We watched it recently but it has disapppeared for some reason. Can you help pls?

Answer:  Hovercraft

It depends on the kind of foam you're using - hot glue will not melt polystyrene, the kind that comes when you unpack delicate items like TVs and glassware from a shipping box. However, there are new types of eco-friendly foam that scientists are developing that are more sensitive to heat and glue polymers. I would try a different piece or use a different adhesive.

Question: from simmons_jr about the Hovercraft experiment :

So we made it and it worked fine except for the hot glue melted the foam, on yours how come it did not melt the foam but ours did? ( on yours could you turn down your heat? or was the foam thicker for yours?) Also to add weight to the front we used lego peices :)

Question: from tuhin_zaman about the Ghost Coin experiment :

we enjoyed this project very much thank you

Answer:  Inertia in Real Life

Yes, m = mass in either kg or lbm

Answer:  What is Fire?

Liquid fires are really dangerous, because you can't turn them off and they slip and slide the flames everywhere the liquid goes. This experiment is very specific about how we handle it, and only an adult should be doing this experiment for you! And, yes, it's the alcohol in the liquid that is burning in this combustion reaction.

Question: from delois about the What is Fire? experiment :

can you make a liquid fire with alcohol?

Question: from ksoh about the Inertia in Real Life experiment :

I'm assuming that the m in the formula 1/2 * (mr²) represents mass. Is that right?

Answer:  Bouncy Ball

It depends - I would recommend wearing gloves each time, since the chemical composition doesn't change, and there are people with skin sensitivities and reactions to alcohol and sodium silicate.

Question: from emilyannejon about the Bouncy Ball experiment :

Hey, so after we make the ball can we take off our gloves? Or do we have to wear gloves every time we get that ball back out?

Answer:  Building Bridges

A quick example is within a member of the bridge itself, with the top part of the beam being pushed one way and the bottom being pushed in the other.

Question: from worou52yufei about the Building Bridges experiment :

Thank you. So what would be an example of shear force acting on a bridge?

Answer:  Origami Airplane & Ninja Star

Try watching the video again, really slow. Use the PUASE button a lot!

Answer:  Building Bridges

The shear force is when you have forces that are not aligned (they do not line up with each other along the same line) pushing on an object in opposing directions. If you were to push the wall at the top in one direction and pull the bottom in the other, that would be a shear force. When they are along the same line, we call them compression forces.

Question: from emilyannejon about the Time Travel using Relativity experiment :

So.. Light only has one speed, right? The speed of light.

Question: from emilyannejon about the General Relativity: Gravitational Waves experiment :

1:54 Reminds me of that crazy cat circle toy... XD

Question: from worou52yufei about the Building Bridges experiment :

What is the shear force in building bridges experiment? Thanks.

Question: from laurenzavlunov about the Origami Airplane & Ninja Star experiment :

I cant figure out how to fold in the points to make a star.

Question: from emilyannejon about the Time Travel using Relativity experiment :

So if we boarded a really fast plane we could 'travel into the future'? It's kinda... okay really hard to believe!

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

this was a very cool expiriment

Question: from irene_chang about the Bomber Plane experiment :

Wow! the best plane I've ever made! i used binder paper and it has a hole in the wing and it still fly's really well!

Question: from emilyannejon about the Two Spaceships Show Time Dilation experiment :

This made so much more sense! Thanks!

Question: from emilyannejon about the Einstein's Special Relativity experiment :

Uh, WOW!! Einstein was a really smart man!!! The faster you move, the slower time moves. Is that really true?

Question: from Jennifer Schreckhise about the Impulse & Momentum experiment :

There is an easy way to explain momentum, this example is a sledgehammer hitting a wall. You need a lot of MOMENTUM to get it going, but once you do, look out! When it hits the wall, the momentum is transferred into that wall. So we see that the sledge is trying to move that wall out of the way, thus causing thing to really move! -Josiah

Question: from hehillary about the Seasons experiment :

I would not recommend to live on Uranus. Because half of it’s orbit around the Sun is with no light and the other half is completely with sunlight.

Question: from joyinthejourney about the Slingshot Rocket experiment :

I just made this and it is awesome!!! Unfortonatley after about eight flights The R.S.S.(Rocket/Space Ship) Comet, had taken on too much damage for action. It is now retired... It's record flight was 44' (I only measured twice...) I will soon make a rival to R.S.S. Comet...

Answer:  Special Science Teleclass: Rocketry & Spaceflight

Some of the lessons will have a worksheet download located under the main video. This option is more for the academic year, so there won't be nearly as many worksheet downloads as for the main curriculum. We do have a complete guide for how to keep a science journal here: https://www.sciencelearningspace2.com/study-units/2009/09/scientific-journal/

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

Do you have any printouts of the lessons in science camp that go with each experiment for my kids to add to a science journal?

Answer:  Can Insulation Save Energy?

This is one of the very few that doesn't have a video - there really wasn't anything to make a video of in terms of doing an experiment.

Answer:  Introduction to Flying Machines

Oh no! I'll have Tonya connect with you asap!

Answer:  Special Science Teleclass: Solar Astronomy

Oh no! I"ll have Tonya connect with you right away.

Question: from Sissa0602 about the Introduction to Flying Machines experiment :

We are e science members but it looks like we dont have access to any of the the flight labs at all. I have the content of the getting started video, the materials list, and the game plan, but when I click on any of the labs at all it says I dont have access. we would like to get started on camp. thank you

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

I'm not able to access the K-8 curriculum. Please advise. Thanks.

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

Is there supposed to be a video in this one if there is for reason I can't find it

Question: from joyinthejourney about the Origami Airplane & Ninja Star experiment :

I cant wait to do this!!! I'll have to wait till after lunch...

Question: from joyinthejourney about the Dart Flyer experiment :

I believe the center of balance on my "dart plane" is too far to the front. It drop quite suddenly after starting out steady for five or so feet. I am going to try adding some weight to the back for more stability in flight.

Answer:  Fire-Water Balloon

Hi Matthew - yes that is a confusing question - I will rewrite it so it is more clear. Heat is the flow of energy from a warm object to a cooler object, and there are three ways heat can be transferred: conduction, convention, and radiation. Thermal energy is the kinetic energy of the molecules in a substance, which we can measure by temperature. The more kinetic energy something has, the higher the temperature. Heat is the flow of thermal energy. Does that help?

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

Hi! I just wanted to give some feedback on the experiment. I certainly enjoyed it especially since I held the balloon to close to the flame for to long; BANG! But while answering the questions it seemed some improvement was necessary. On question 2. (Name two types of energy.) from the reading it seemed like all the possible answers (conduction, convention, and radiation) where NOT types of heat, but rather different means of heat transfer. Is this correct? Also, I think an explanation of those three things (conduction, etc.) would be both necessary in order to answer question 3 and very educational. Thank you! -Matthew Mitzel

Answer:  Introduction to Kinematics

This one might be best answered in an e-mail, but I will start it here. If you are beginning your high school studies with us, we do recommend physics and chemistry proceeding biology and Earth science. However, if you're only wanting to study for the summer, you can pick any topic you like. It's a recommendation not a requirement. Ultimately, you get to choose how you use the program and how you work through it. Let us know how we can assist you in your educational adventures! Does that help?

Answer:  Stargazing on June 13th 7pm Pacific

Yes, we will be covering the entire Northern Hemisphere, with a few highlights for southern as well because our students are worldwide. You will be able to go outside after our talk and be able to look up and start stargazing right away. The class timing will not work for everyone, which is why it will be recorded and posted so you could watch it anytime that is most convenient for you.

Answer:  Robotic Hand

Once you select the grade level and subject you want to focus on, you can work your way through the experiment in any order, completing the first one at the top first. If you would like them to go through this program in a consecutive way, where one topic builds on another, then select to go through by Topic, working your way from units 1 through 20.

Answer:  Introduction to Creating a Homemade Weather Station

Oh no! It sounds like there's something wrong with your account, my assistant will reach out to you today to make sure everything is correct. My apologies!

Answer:  Describing Motion with Equations

I am not sure what happened, I will have my assistant reach out and connect with you today.

Answer:  Salty Eggs

There is some overlap with the program, some of the basics are reiterated again in the high school section for review. You should have access to it. You are able to request access for any grade level you like, and all the content will be unlocked.

Answer:  Human Levers

Ues, you've got it! It's all a matter of where the load is and where the fulcrum is.

Question: from soccermommyx09 about the Introduction to Kinematics experiment :

hi. I thought i signed up for all grades science. my daughter is 9th grade going to study biology and my son 4th grade. the videos here say if we want to learn biology then start with physics because they all tie in. so how do i get access to the rest? or just look at biology through summer ? thanks

Question: from stephanie_zelaya about the Laundry Soap Crystals experiment :

I love your video thank you