2 pt 3 pt 4 pt 5pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt 2pt 3 pt 4pt 5 pt 1pt 2pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4pt 5 pt 1pt Erosion Potpourri Chemical Weathering Mechanical Weathering Deposition
True or false… Erosion occurs when rocks are not moving…
False
What can be moved because of erosion?
Rocks, sediment, and Earth materials
The formation of sand dunes is the result of — A abrasion B chemical weathering C erosion by moving water D deposition
Deposition
The rich topsoil of the prairie in the picture shown makes this ecosystem suitable for the growth of a variety of grasses. All of the following processes contribute to the formation of the topsoil in the prairie except — A weathering of rocks B ocean waves C deposition of weathered material D decomposition of living things
ocean waves
_______is the most important erosional agent and erodes most often in streams or rivers.
Wateris the most important erosional agent and Water is the most important erosional agent and erodes most often in streams or rivers.
A hurricane forms over the ocean and hits the Texas coast and travels inland. What is the most likely effect of this event? A More species of animal will inhabit the coast B The shape and size of beaches will be changed C The affected area will be less vulnerable to future natural disasters D Native plants will never inhabit the area again
B The shape and size of beaches will be changed
When the scooter hits a rock, the rider tends to fly forward because – A objects at rest tend to stay at rest B the scooter is subjected to a balanced force C a force opposes the motion of the scooter but not the rider D unbalanced forces cause objects to move at a constant speed
C. a force opposes the motion of the scooter but not the rider
Which of the following is a force that can oppose or change motion? A.gravity B.air resistance C.friction D.all of the above
The diagram above illustrates a movable pulley. This pulley gives a mechanical advantage by - A reducing the force required to lift the load. B changing the force direction C requiring the force to be greater than the load D requiring the force to move less distance than the load Load Force
A. reducing the force required to lift the load.
The picture shows a simple fixed pulley being used to lift a heavy box. Which of these does the pulley change? A A. The mass of the box being moved B B. The amount of force required to move the box C C. The direction of force required to move the box D D. The amount of energy required to move the box
C. The direction of force required to move the box
Chemical weathering happens quickly in ______, _______environments because water is needed for the chemical reactions.
warm, moist
In chemical weathering, a rock is broken down by ______ ______that change its mineral composition and physical and chemical properties
chemical reactions
True of False: Water can chemically weather rocks by dissolving rocks.
True
True of False: Living organisms such as Lichens do not chemically weather rocks.
False
True of False: Rust is a form of chemical weathering
True
Mechanical weathering: __________ breaks rocks down into smaller pieces
physically
True or False: Weathering happens to rocks that are moving.
False
Explain how this is an example of weathering?
The tree roots are growing into the rock prying it into smaller pieces
How does freezing and thawing cause mechanical weathering?
When water freezes, it expands causing the cracks go grow
What is abrasion?
Mechanical weathering in which rocks rub against together wearing them down
What is it called when a glacier picks up a rock, or sediments off of the ground?
Plucking
How can wind be a cause of erosion?
Wind can blow sediment (dirt) from one place to another
What happens to rocks and sediment that are plucked by glaciers whenever the glacier melts?
The rocks and sediment are deposited in a new location.
Describe how waves in the ocean can cause erosion.
Waves can cause beaches and coastlines to be reformed time after time
What force causes rock slides and mud flows?
Gravity!