1. How did planetesmals form planets? (1 point) A. They broke apart into smaller chunks. B. They collided and stuck together.** C. They cooled and pulled ice together. D. They began to rotate.
2. Which parts of the sun’s atmosphere become visible during a total solar eclipse? (1 point) A. photosphere and corona B. chromosphere and corona** C. photosphere and chromosphere D. prominences and flares
3. Which of the following statements about features on the sun is true? (1 point) A. Prominences look dark in regular photographs. B. Solar flares form when prominences connect.** C. The number of sunspots on the sun’s surface is always the same. D. Sunspots can greatly increase the solar wind.
4. Which of the following statements about similarities among the inner planets is true? (1 point) A. Mercury and Mars have the same number of moons. B. Mercury and Venus have similar atmospheres. C. Earth and Venus are about the same size.** D. Earth and Mars both have liquid water.
5. Which of the following inner planets is characterized by an internal structure similar to Earth’s and the hottest surface of any planet? (1 point) A. Mercury B. Venus** C. Mars D. Jupiter
6. What do the gas giants have in common? (1 point) A. They are much larger than Earth***. B. They are made completely of gas. C. They support life. D. They lack satellites.
7. What are Saturn’s rings mostly made of? A. nitrogen and helium B. ice and water vapor C. volcanic dust particles D. chunks of ice and rock****