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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 rich in decomposers
B
is important to all living things on land
C
contains sand and gravel
D
has all three soil horizons
2) Most geologists think that the movement of Earth's plates is caused by
A
earthquakes
B
Earth's magnetic field
C
convection currents in the mantle
D
conduction
3) How do most fossils form?
A
living things die and their remains are buried by sediments
B
freezing preserves the reamins of an organism
C
the soft parts of an organism change to stone
D
the hard parts of an organism dry out in the air
4) Scientist think that convection currents flow in Earth's
A
inner core
B
lithosphere
C
continents
D
mantle
5) Decomposers are the soil organisms that
A
burrow deep below the topsoil
B
store moisture in the soil
C
make spaces in the soil for air and water
D
break down and digest the remains of dead organisms
6) According to Wegner's hypothesis of contenental drift
A
Earth's surface is made up of seven major landmasses
B
the continents do not move
C
the continents were once joined together in a single landmass
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
subduction
B
continental drift
C
convection
D
conduction
8) A hot and wet climate causes weathering to take place
A
rapidly
B
at the same rate
C
slowly
D
unevenly
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 speed of seismic waves
B
the ground movements caused by seismic waves
C
the Mercalli scale rating for an earthquake
D
the location of the epicenter
*select an answer for all questions
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