Flashcards in Science Test- 1/25/18 Deck (38):
Ice expands, pushing deeper into rock, then ice melts
As it rains and when the wind blows tiny particles it smooths out the rock.
Growth of Plants
The roots of different plants break the rock and sidewalks as the roots grow.
Actions of Animals
Animals burrow under and climb on top of rocks causing them to become loose and causing them to break.
Heating and Cooling
Unequal rates of expansion cause the outside of rocks to break off like flakes.
Freezing and Thawing
As water freezes in the cracks of rocks it causes the rock to expand and cause more cracks.
What is a powerful agent of both chemical and physical weathering?
How does the water shape the land through abrasion?
By the grinding action of particles carried in rivers and stream beds.
How does the water shape the land through long shore drift?
Waves move sand from one beach to another.
How does the water shape the land through stream erosion?
Creating gullies and deltas by erosion and deposition
In the fizz faster activity what did the whole tablet represent?
A whole rock.
In the fizz faster activity what did the crushed tablet represent?
Sediment or broken bits of rock
In the fizz faster activity what type of weathering did the whole tablet undergo?
In the fizz faster activity what type of weathering did the crushed tablet undergo?
Mechanical/physical and chemical weathering
In the fizz faster activity why did the crushed tablet dissolve faster?
The water could reach every part of the crushed pieces.
What is beach replenishment?
When people take sand from one beach and bring it to another since sand was lost due to erosion.
What are some reasons people are against beach replenishment?
It is expensive, harms neighboring marine life and it’s not natural
What process makes a rock turn into a metamorphic rock?
When they are under intense heat and pressure.
Sedimentary; reddish layers; grainy (gritty)
Igneous; coarse; rough
Igneous; shiny black glass
Metamorphic; white or whitish with crystals
Sedimentary; grey; grainy; rough layers
Igneous; light grey; tiny holes; rough
Metamorphic; dark grey
What processes turn an igneous rock into a sedimentary rock?
How are igneous rocks formed?
From magma or lava that cools and hardens
What is the most common rock on Earth?
What type of rock is basalt?
Where does basalt form?
The ocean floor
Where does sediment come from?
Broken bits of other rocks
Name several reasons why sedimentary rocks are the most commonly used rock in construction.
Plentiful, easy to find, don’t have to dig far, soft compared to other rocks making them easy to shape
What natural phenomenon is likely to occur near a fault?
Why are Earthquakes common in California?
They have several faults in California.
What causes the movements of tectonic plates?
Movements in the mantle
Explain what is meant by the term sea floor spreading.
Occurs at mid open ridges where new ocean crust forms through cooling lava and gradually moves away from ridge
Explain what is meant by the term subduction.
When one tectonic plate slides underneath another as it sinks it melts becoming part of the mantle.