Shared Flashcard Set

Details

Chapters 9-10
Review
34
Science
3rd Grade
03/17/2013

Additional Science Flashcards

 


 

Cards

Term
topsoil
Definition

top layer of soil

dark and rich in minerals

Term
subsoil
Definition

layer of soil below the topsoil

lighter in color

fewer minerals

Term
fertile
Definition

plants grow well in soil

 

rich in mineral resources

Term
fertilizer
Definition
something added to the soil to replace mineral resources
Term
soil erosion
Definition
the wearing away of soil or rock by wind and water
Term
gullies
Definition
small ditches where the soil is washed away
Term
How does the earthworm's tunnel help the soil?
Definition
The tunnel allows air and water to get into the soil.
Term
mole
Definition
Kills roots of plants as it plows under the ground to make its tunnel.
Term
shrew
Definition

one of the smallest mammals in the world

 

eats 3x its weight in food each day

Term
skunks
Definition
eats harmful insects, mice, and rats
Term
field mouse
Definition
It eats and destroys about 25 pounds of the farmer's crops each year.
Term
weather
Definition
condition of the air
Term
atmosphere
Definition
layer of air that surrounds the earth
Term
3 main elements that make the weather
Definition
heat, water, and wind
Term
radiate
Definition
to send out rays of heat
Term
Water can be in the air in several forms
Definition
solid, liquid, or a gas
Term
What does the earth absorb during the day?
Definition
sun's heat
Term
wind
Definition
moving air
Term
precipitation
Definition
rain, snow, sleet, and hail
Term
water cycle
Definition
The earth and the air are always exchanging water with each other.
Term
How do raindrops form?
Definition
forms when warm, moist air in a cloud meets cold air
Term
raindrops
Definition
perfectly round
Term
droplet
Definition
This is what a raindrop is first called because it is so tiny.
Term
snowflake
Definition
six sided and are not alike
Term
sleet
Definition
comes from rain that has fallen through freezing air
Term
hail
Definition

falls in the spring and summer

 

frozen raindrops that are bounced up and down by the air in a thunderstorm before they fall to earth in the shape of stones

Term
3 most widely known storms in the U.S.
Definition
thunderstorms, hurricanes, and tornadoes
Term
humid
Definition
there is a large amount of water vapor in the air
Term
lightning
Definition
can jump from cloud to cloud or from a cloud to the ground
Term
thunder
Definition

sound that lightning makes

 

heats the air

Term
hurricane
Definition

a whirling windstorm that begins over the ocean

 

strong winds and heavy rains

Term
tornado
Definition

windstorm that builds up over hot land

 

spinning, black funnel

Term
water vapor
Definition
water in the gaseous form
Term
evaporate
Definition
to change into a vapor
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