statement or best answers each question.
1. Earth can be divided into how many physical layers?
a. five
c. eight
b. three
d. six
2. The approximate temperature of the inner core is
a. between 3,000°C and 4,000°C. c. between 4,000°C and 5,000°C.
b. between 4,000°F and 5,000°F. d. unknown.
3. The inner core is solid because
a. it absorbs heat from the sun. c. it is influenced by global arming.
b. it is under tremendous pressure. d. the movement of tectonic plates
causes friction.
4. One-third of Earth's mass is made up of what?
a. Earth's outer core
c. tectonic plates
b. Earth's inner core
d. both (a) and (b)
