Concept Review
Review Questions
Question 1
List Earth's four layers from outermost to innermost.
Question 2
Which layer of Earth is liquid metal?
Question 3
What causes Earth's magnetic field?
Question 4
How long does Earth take to orbit the Sun?
Question 5
What causes the seasons on Earth?
Question 6
What is the difference between a meteor and a meteorite?
Question 7
Why does the Moon appear to change shape throughout the month?
Question 8
What type of rock forms from cooled lava?
Question 9
How do scientists learn about the inside of Earth without digging there?
Question 10
Why is Mars called the "Red Planet"?
Answers
Click to reveal answers
1. Crust, mantle, outer core, inner core
2. The outer core
3. Movement of liquid iron in the outer core
4. Approximately 365.25 days (one year)
5. Earth's tilted axis (23.5 degrees)
6. Meteor: streak of light in sky; Meteorite: rock that lands on Earth
7. We see different amounts of its sunlit side as it orbits Earth (Moon phases)
8. Igneous rock
9. Seismic waves from earthquakes - they travel differently through different materials
10. Iron oxide (rust) in the soil gives it a reddish color