6th Grade Chapter 7 Lesson 2 Quiz Review Question Preview (ID: 34797)


Ch. 7 Lesson 2. TEACHERS: click here for quick copy question ID numbers.

An event in which the magnetic field reverses direction
a) seafloor spreading
b) magnetic reversal
c) normal polarity
d)

A mountain range located on the seafloor in the middle of the ocean
a) mid-ocean ridge
b) seafloor spreading
c) canyon
d)

Today's magnetic field; magnets orient themselves to point north
a) magnetic reversal
b) reversed polarity
c) normal polarity
d)

magnetic field in which magnets orient themselves to point south
a) magnetic reversal
b) reversed polarity
c) normal polarity
d)

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
d)

Scientists mapped the depth of the ocean floor using a device called
a) echo sounder
b) seismograph
c) battery operator
d)

The older crust in the ocean is located
a) right by the mid-oceanic ridge
b) near the poles
c) further away from the mid-oceanic ridge
d)

Which of the following is not evidence for seafloor spreading
a) magnetic reversal seen in rocks
b) temperature measurements of thermal energy
c) fossils found at the ridge
d) sediment age and thickness along the ridge

The __________ is a flat area due to the accumulation of sediments far from the ridge.
a) abyssal plain
b) seafloor spreading
c) magnetic reversal
d)

High thermal energy flow at the ridge comes from seawater
a) True
b) False
c)
d)

When the Earth's magnetic field is a normal polarity, a compass needle points
a) south
b) west
c) east
d) north

The new crust being made at a mid oceanic ridge is what kind of rock?
a) granite
b) basalt
c) limestone
d)

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