
What do you need to go sledding? You need a sled. You need snow. Is that all?
Sit on your sled. What happens? Nothing! You need a push or pull to make you go!
Photo Credit: majatoni/Shutterstock
What is chemistry? Is it chemicals? Is it a lab? … read more
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Maria Telkes was born in 1900. She was a scientist. … read more
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