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Third Quarter Science Review
Earth Science
24
History
4th Grade
03/09/2009

Additional History Flashcards

 


 

Cards

Term
erosion
Definition
moving water, wind, and moving ice pick up and carry soil and other materials in a process known as
Term
moving water
Definition
What causes the most erosion on earth?
Term
sediments
Definition
materials such as soil and gravel that are carried by moving water, wind, or moving ice are called
Term
weathering
Definition
rocks are broken into smaller pieces by the process of
Term
glacier
Definition
a large mass of ice that forms over land
Term
sand dunes
Definition
piles of sand deposited in one place by the winds
Term
land fill
Definition
What is similar to a dump except it is built to keep trash from harming the environment?
Term
pollution
Definition
What happens when people, factories, or machines add unwanted materials to the air, water, or land?
Term
paper
Definition
Recycling what material reduces the number of trees that are cut down?
Term
solar energy
Definition
Power from the sun
Term
renewable resources
Definition
fresh water, trees, and plants are examples of what kind of resources?
Term
humus
Definition
material that was once living organisms that has been broken down by decomposers
Term
soil
Definition
bits of rock, animal material, and plant material makes up what?
Term
mineral
Definition
a nonliving material from the earth with a definite structure, such as quartz
Term
planting trees or other plants
Definition
What is one of the main things people can do to prevent erosion?
Term
canyon
Definition
What is the name of the landform that is a deep, narrow valley that often has a stream or river running through it?
Term
recycle
Definition
What is a good way to help conserve natural resources?
Term
valley
Definition
Scientists observed a stream eroding a steep area over many years. What landform will most likely develop if this process continues?
Term
delta
Definition
What is created when sediments are deposited where a river meets a larger body of water?
Term
desert or shoreline
Definition
Where will you find a sand dune?
Term
river's end or mouth or where a river meets a larger body of water
Definition
Where will you find a delta?
Term
Both are caused by moving sediments.
Definition
How are a delta and dune alike?
Term
wind
Definition
What causes a sand dune?
Term
moving water
Definition
What causes a delta?
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