Grade: Grade 6 Subject: Science Unit: Earth & Space Lesson: 6 of 6 SAT: ProblemSolving+DataAnalysis ACT: Science

Unit Checkpoint

Unit Assessment

Question 1

The thickest layer of Earth is the:

  1. Crust
  2. Mantle
  3. Outer core
  4. Inner core

Question 2

What is the inner core made of?

Question 3

Explain why we experience day and night.

Question 4

What is the name of our galaxy?

Question 5

Which planet is closest to the Sun?

Question 6

How does a solar eclipse occur?

Question 7

What evidence do scientists use to support the theory that Earth has layers?

Question 8

Compare the inner planets to the outer planets.

Question 9

What is an asteroid belt and where is ours located?

Question 10

Explain why the Moon always shows the same face to Earth.

Answer Key

Click to reveal answers

1. B - Mantle (about 2,900 km thick)

2. Solid iron and nickel

3. Earth rotates on its axis; the side facing the Sun has day, the opposite side has night

4. The Milky Way

5. Mercury

6. The Moon passes between Earth and the Sun, blocking sunlight

7. Seismic waves travel at different speeds through different materials

8. Inner planets (Mercury, Venus, Earth, Mars) are small, rocky; Outer planets (Jupiter, Saturn, Uranus, Neptune) are large, gaseous

9. A region of rocky objects; ours is between Mars and Jupiter

10. The Moon rotates on its axis at the same rate it orbits Earth (synchronous rotation)

Self-Assessment

ScoreMastery LevelNext Steps
9-10AdvancedMove on to the next unit!
7-8ProficientReview missed concepts, then proceed.
5-6DevelopingReview lessons 3-5 before moving on.
0-4BeginningRestart the unit from Lesson 1.