Science | Innovation | Science Questions

Science questions are a fun and interesting way to learn about planet Earth, organisms and the universe. In this section you'll find an incredible collection of science questions covering a wide variety of topics.

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How do scratch-and-sniff stickers work?

How do scratch-and-sniff stickers work? What makes them last for years and years?


How does a lava lamp work?

How does a lava lamp work? See more »

How does silk-screening work?

I'm having T-shirts printed, and the people at the shop keep talking about "silk-screening." How does silk-screening work? See more »

How does a chicken's egg get its shell?

How do chickens create eggs? Does the chicken's body make the shell and fill it with the white and yolk somehow, or does it make the white and yolk and then somehow wrap the shell around it? See more »

Why does Alka Seltzer fizz?

Yesterday you talked about hydrogen peroxide, and the day before you talked about Pop Rocks candy. Since we are talking about things that fizz, what about Alka Seltzer? How does it work and why does it fizz? See more »

Why is there a small hole on the top of spray-can lids?

There is a can of Pam in my kitchen that has a small hole in the lid. Lots of other cans have this hole. Why? See more »

How does Pop Rocks candy work?

There's a candy called 'Pop Rocks.' When you put it in your mouth it makes a loud popping sound and it feels really weird! How do Pop Rocks work? See more »

What is silica gel and why do I find little packets of it in everything I buy?

What is silica gel and why do I find little packets of it in everything I buy?

Many of the things I buy contain little packets of crystals. Some of them actually say 'Silica Gel' on them, but many are unlabeled or say something like, 'Do not eat.' I have found these packets in electronics, vitamins and even in some pepperoni I bought last week! What is this stuff? Is it poisonous? See more »

How do scratch-and-sniff stickers work?

How do scratch-and-sniff stickers work?

How do scratch-and-sniff stickers work? What makes them last for years and years? See more »

What is a nautical mile, and how does it differ from a normal mile and a kilometer?

What is a nautical mile, and how does it differ from a normal mile and a kilometer?

What is a nautical mile, and how does it differ from a normal mile and a kilometer? See more »

Why does hydrogen peroxide foam when you put it on a cut?

Why does hydrogen peroxide foam when you put it on a cut?

Hydrogen peroxide is something that is used to clean cuts. Have you ever wondered why it foams when placed on a cut? Learn about hydrogen peroxide. See more »