Question 1. What are the parts of Earth's mantle? (4 points) A. Inner core, asthenosphere, lithosphere
B. Lithosphere, asthenosphere, mesosphere
C. Crust, lithosphere, asthenosphere
D. Mesosphere, asthenosphere, troposphere

Question 2. Due to the intense heat and pressure on the inner core, scientists believe it is a (4 points)
A. solid
B. liquid
C. semi-fluid
D. gas

Question 3. If Earth was like a hardboiled egg, which part of Earth would the egg white represent? (4 points)
A. Mantle, as its depth is less than 2,900 kilometers
B. Core, as its depth is less than 2,900 kilometers
C. Mantle, as its depth is up to 6,500 kilometers
D. Core, as its depth is up to 6,500 kilometers

Question 4. Two students below described a type of Earth's outermost layer:
Student A: 5–12 kilometers deep
Student B: Makes up the sea floor
Which type of outermost layer did the students describe? (4 points)
A. They both described the oceanic type.
B. They both described the continental type.
C. Student A described the oceanic type and Student B described the continental type. D. Student A described the continental type and Student B described the oceanic type.

Question 5. Scientists have observed that Earth's tectonic plates move in predictable directions. What is the cause of this observation? (4 points)
A. Uniform pressure inside Earth forces the plates to move
B. Uniform temperature inside Earth forces the plates to move
C. Variations in temperatures inside Earth forces the plates to move
D. Vibrations in the core forces the plates to move