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Database Sources
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Encyclopedia Britannica
Encyclopedia Britannica
Website Sources
Website Sources
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Why is the sky blue?
Why is the sky blue?
Why do leaves change color in the fall?
Why do leaves change color in the fall?
NOAA National Environmental Satellite, Data, and Information Service
How are rainbows created?
How are rainbows created?
NOAA National Environmental Satellite, Data, and Information Service
Why is fire usually orange?
Why is fire usually orange?
Why does water often seem blue?
Why does water often seem blue?
Woods Hole Oceanographic Institution
Why are bubbles round?
Why are bubbles round?
Why are planets round?
Why are planets round?
How does an X-ray work?
How does an X-ray work?
St. Jude Children's Research Hospital
Why do magnets attract?
Why do magnets attract?
How would time travel be possible?
How would time travel be possible?
What happens to an object when it approaches the speed of light?
What happens to an object when it approaches the speed of light?
How big is the known universe?
How big is the known universe?
Why is space black?
Why is space black?
How many stars exist?
How many stars exist?
What is a black hole?
What is a black hole?
What will eventually happen to the sun?
What will eventually happen to the sun?
How big is the sun, compared to the earth?
How big is the sun, compared to the earth?
National Informal STEM Education Network (NISE Net)
Where did the moon come from?
Where did the moon come from?
Why does the moon cause tides?
Why does the moon cause tides?
National Environmental Satellite, Data, and Information Service (NOAA)
Why does the earth spin?
Why does the earth spin?
Children's Museum of Indianapolis
What is a day, and why is it 24 hours?
What is a day, and why is it 24 hours?
What is the sun made of?
What is the sun made of?
How old is the earth?
How old is the earth?
How does air stay on earth?
How does air stay on earth?
What percentage of a human body is bacteria?
What percentage of a human body is bacteria?
National Institute of General Medical Sciences
What is air made up of, besides oxygen?
What is air made up of, besides oxygen?
Avoid Plagiarism Cite Your Sources
Avoid Plagiarism Cite Your Sources
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