1, How does sea-floor spreading occur?
A, New materials are being added to the asthenosphere.
B, Earthquakes break apart the ocean floor.
C, Sediments accumulate at the area of spreading.
D, Molten material beneath Earth's crust rises to the surface. ••
2, Which features form the longest mountain range on Earth?
A, The mid-ocean ridges. ••
B, The deep-ocean trenches.
C, The Rockies
D, The Andes.
3, How does sub-duction change the ocean floor?
A, Subduction causes magma to accumulate on the ocean floor.
B, Subduction causes oceanic crust to break into pieces.
C, Subduction causes the ocean floor to sink into deep ocean trenches. ••
D, Subduction causes metamorphic rocks to form.
4, How are ocean trenches formed?
A, Ocean trenches are formed when oceanic plate cools and moves to the surface of the ocean.
B, Ocean trenches are formed when the denser oceanic plate sinks. ••
C, Ocean trenches are formed when molten rock cools and solidifies.
D, Ocean trenches are formed when magma accumulates on the ocean floor.
6 answers
A
C
B
A
C
D
Hops that helps
Unit 1: Earth's interior systems.
1.
answer: D. Molten material...
2.
answer: A. the mid-ocean ridges
3.
answer: C. Subduction causes the ocean floor...
4.
answer: B. Ocean trenches are formed when denser oceanic plate sinks.
(quick check)
P.S some higher grades such as 7th grade, 8th grade, will have similar tests, or the exact same.
I'm currently giving answers for 6th-grade lessons. But 7th/8th graders might have the same quick check!
-someone from connexus
1 answer