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Science Midterm 2
Test Description: Review for Midterm 6th grade
Instructions: Answer all questions to get your test result.
1) Soil is a valuable resource because it
A
is important to all living things on land
B
has all three soil horizons
C
contains sand and gravel
D
is rich in decomposers
2) Most geologists think that the movement of Earth's plates is caused by
A
Earth's magnetic field
B
conduction
C
convection currents in the mantle
D
earthquakes
3) How do most fossils form?
A
freezing preserves the reamins of an organism
B
living things die and their remains are buried by sediments
C
the hard parts of an organism dry out in the air
D
the soft parts of an organism change to stone
4) Scientist think that convection currents flow in Earth's
A
inner core
B
mantle
C
continents
D
lithosphere
5) Decomposers are the soil organisms that
A
break down and digest the remains of dead organisms
B
store moisture in the soil
C
burrow deep below the topsoil
D
make spaces in the soil for air and water
6) According to Wegner's hypothesis of contenental drift
A
Earth's surface is made up of seven major landmasses
B
the continents were once joined together in a single landmass
C
the continents do not move
D
Earth is slowly cooling and shrinking
7) The process by which the ocen floor sinks beneath the deep-ocean trench and back into the mantle is know as
A
convection
B
continental drift
C
conduction
D
subduction
8) A hot and wet climate causes weathering to take place
A
rapidly
B
slowly
C
unevenly
D
at the same rate
9) Which of the following can cause damage days or months after a large earthquake?
A
the arrival of surface waves
B
a tsunami
C
an aftershock
D
liquefaction
10) What does a seismograph record?
A
the Mercalli scale rating for an earthquake
B
the ground movements caused by seismic waves
C
the speed of seismic waves
D
the location of the epicenter
*select an answer for all questions
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