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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
contains sand and gravel
B
is rich in decomposers
C
has all three soil horizons
D
is important to all living things on land
2) Most geologists think that the movement of Earth's plates is caused by
A
earthquakes
B
convection currents in the mantle
C
Earth's magnetic field
D
conduction
3) How do most fossils form?
A
living things die and their remains are buried by sediments
B
the soft parts of an organism change to stone
C
the hard parts of an organism dry out in the air
D
freezing preserves the reamins of an organism
4) Scientist think that convection currents flow in Earth's
A
lithosphere
B
continents
C
inner core
D
mantle
5) Decomposers are the soil organisms that
A
make spaces in the soil for air and water
B
break down and digest the remains of dead organisms
C
store moisture in the soil
D
burrow deep below the topsoil
6) According to Wegner's hypothesis of contenental drift
A
the continents were once joined together in a single landmass
B
Earth's surface is made up of seven major landmasses
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
subduction
B
conduction
C
convection
D
continental drift
8) A hot and wet climate causes weathering to take place
A
rapidly
B
at the same rate
C
unevenly
D
slowly
9) Which of the following can cause damage days or months after a large earthquake?
A
a tsunami
B
an aftershock
C
the arrival of surface waves
D
liquefaction
10) What does a seismograph record?
A
the location of the epicenter
B
the speed of seismic waves
C
the Mercalli scale rating for an earthquake
D
the ground movements caused by seismic waves
*select an answer for all questions
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