In the 1600’s Copernicus and Galileo believed that the earth and other planets orbited the sun. Why were their ideas not accepted at first?
Which of the following is an example of technology?
Why was the discovery of moons orbiting Jupiter a significant event?
What two atoms make up the majority of the mass in our universe, and perform nuclear fusion in our sun?
Why does the Moon only have 1/6 of the Earth's gravity?
What causes the earth's seasons?
Which two factors combine together to cause an object to remain in a stable orbit?
Why does the earth experience day and night?
We know that Mercury is the closest planet to the sun. Why then is Venus hotter than Mercury?
The Earth, the moon, Venus and Mars are all made of similar elements. What factors contribute to the existence of life on Earth while the other neighboring planets and moons are lifeless?
Why is it theoretically possible to fly through the upper layers of Jupiter and Saturn?
Which of the following planets is about the same size of our Earth, and has a thick atmosphere which makes it very hot?
Mars and Earth receive about the same amount of solar radiation. Why than does the Earth have a perfect temperature range for life, but Mars does not?
Which of the following is the temperature of the Sun’s core?
Compared to the outer planets…
Venus
Mars
Jupiter
What is one astronomical unit?
Which is false about Pluto?
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