AST 111- Unit 2 Assesment

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Central Michigan University *

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111

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Astronomy

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Jan 9, 2024

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Logan Bell AST 111 Unit 2 Assessment 1. True/False Is it true or false that our solar system currently consists of the sun, 8 planets, 5 dwarf planets, nearly 200 known moons, and a host of smaller objects? 2. Fill in the blank ____ are created as tiny solid particles that enter the Earths atmosphere from interplanetary space. 3. Which of the following is true? A. a typical meteor is produced by a mass of less than 3 grams B. a typical meteor is produced by a mass of less than 10 grams C. a typical meteor is produced by a mass of less than 1 gram, no larger than a pea D. a typical meteor is produced by a mass of less than 33 grams 4. True/False The moon is the largest of terrestrial worlds. 5. Fill in the blank ______ are objects that formed in the solar nebula as an intermediate step between tiny grains and the larger planetary objects we see today. 6. This is known as the cloud of gas and dust from which the solar system formed A. Comet B. Meteorite C. Solar nebula D. planetesimals 7. This term is used for any rock that has cooled from a molten state A. Meteor B. Igneous rock C. Lava rock D. Sedimentary rocks 8. True/ False Metamorphic rocks are produces when high temperatures or pressure alters igneous or sedimentary rock physically or chemically. 9. Fill in the blank

About ____ kilometers of active rifts have been identifying, with average separation rate of about 5 centimeters per year. 10. When were Earth and the moon formed? A. Between 10.8 and 11 billion years ago B. Over 20,000 years ago C. Roughly 6 million years ago D. Between 4.5 and 4.6 billion years ago 11. True/ False Most of the crust on the moon consists of silicate rocks called anorthosites. 12. Which of the following is not one of the three standard hypotheses for the origin of the moon? A. Fission Hypotheses B. Brother Hypotheses C. Sister Hypotheses D. Capture Hypotheses 13. What is the average distance of mars from the sun? A. 333 million Kilometers B. 2 Kilometers C. 227 million kilometers D. 222 million kilometers 14. How many spacecrafts have been launched to planet Venus? A. 20 B. 23 C. 55 D. 50 15. Fill in the blank About __ of the surface of Venus consists of lowland lava plains. 16. True/ False Saturn is about 2 times as far away as Jupiter and takes nearly 30 years to complete one orbit. 17. The primary clouds that we see around planets in space are composed of what?

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