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6th Grade Chapter 7 Lesson 2 Quiz Review
Test Description: Ch. 7 Lesson 2
Instructions: Answer all questions to get your test result.
1) An event in which the magnetic field reverses direction
A
normal polarity
B
magnetic reversal
C
seafloor spreading
2) A mountain range located on the seafloor in the middle of the ocean
A
mid-ocean ridge
B
canyon
C
seafloor spreading
3) Today's magnetic field; magnets orient themselves to point north
A
normal polarity
B
magnetic reversal
C
reversed polarity
4) magnetic field in which magnets orient themselves to point south
A
normal polarity
B
magnetic reversal
C
reversed polarity
5) When new oceanic crust forms at a mid-ocean ridge as old oceanic crust moves away
A
plate tectonics
B
seafloor spreading
C
continental drift
6) Scientists mapped the depth of the ocean floor using a device called
A
echo sounder
B
seismograph
C
battery operator
7) The older crust in the ocean is located
A
further away from the mid-oceanic ridge
B
near the poles
C
right by the mid-oceanic ridge
8) Which of the following is not evidence for seafloor spreading
A
sediment age and thickness along the ridge
B
temperature measurements of thermal energy
C
fossils found at the ridge
D
magnetic reversal seen in rocks
9) The __________ is a flat area due to the accumulation of sediments far from the ridge.
A
abyssal plain
B
magnetic reversal
C
seafloor spreading
10) High thermal energy flow at the ridge comes from seawater
A
True
B
False
11) When the Earth's magnetic field is a normal polarity, a compass needle points
A
north
B
south
C
west
D
east
12) The new crust being made at a mid oceanic ridge is what kind of rock?
A
limestone
B
granite
C
basalt
*select an answer for all questions
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