Rock Cycle
Erosion
CAST Practice
Mystery Science
100
This type of rock is composed of sediment that has eroded away.
Sedimentary
100
A landslide is an example of this.
Erosion
100
A tiltmeter is an instrument that is used to measure changes in the tilt of the ground. The ground near volcanoes moves before a volcano erupts, so scientists use tiltmeters to predict when a volcano might erupt.
Should the scientists put the tiltmeter near the city or the volcano?
Near the volcano
100
A short, wide volcano is called a _____ volcano.
Shield
200
Lava rock is this type of rock.
Igneous
200
Erosion is caused by this.
Rain & Wind
200
This hill has two distinct rock layers. Which rock layer had to be there first: A or B?
Rock Layer B
200
a tall, thin volcano is called a _____ volcano.
Cone volcano
300
This type of rock is often smooth and shiny, or it has lots of gas bubbles.
Igneous
300
This is one way to prevent a hill from eroding.
Plant vegetation
300
Students observe two hills after a heavy rainstorm. Hill A has more loose soil at the bottom than hill B. What is the most likely cause?
A) Hill A has fewer plants than hill B.
B) Hill A erodes more slowly the hill B.
C) Hill A has a slope not as steep as hill B.
D) Hill A receives less average rainfall than hill B.
A) Hill A has fewer plants than hill B.
300
This is where you can find most volcanoes.
Ring of Fire
400
This type of rock has lines and crystals in it.
Metamorphic
400
If a hill is ______, erosion can occur more quickly.
Steep
400
A family examines a large fossil embedded in rock and see a fossilized whale. They also see smaller marine fossils. They are surprised to find marine fossils near the top of a mountain.
Complete this sentence:
The fossil formed when
A) it was on a mountaintop.
B) the rock was exposed by rain.
C) it was sediment on the ocean floor.
D) old bones washed down the mountain.
C) it was sediment on the ocean floor.
400
This the name of lava rock.
Basalt
500
In order for sedimentary rock to become a metamorphic rock it must undergo these two things.
Heat & Pressure
500
How could a wildfire contribute to erosion?
The fire can burn up all the plants, so they won't hold the hill together anymore.
500
Two scientists think that even though they found the rock near the top of a mountain, the rock formed from sediment deposited on the ocean floor. They want evidence to support this claim.
Which observation support their claim?
A) The rock is near a campsite.
B) The rock is on a mountain top.
C) The rock was exposed by heavy rain.
D) The rock contains a fossilized sea star.
D) The rock contains a fossilized sea star.
500
Lava that is beneath the Earth is called _____.
Magma