Download KEY TO PRETEST AND POST TEST

KEY TO PRETEST AND POST TEST
THE WATER CYCLE PRETEST
Name___________________
1. What role does evaporation play in the water cycle?
EVAPORATION IS THE CHANGE IN PHYSICAL STATE TO A GAS OR A
VAPOR. (WATER CHANGES FROM A LIQUID INTO A GAS CALLED WATER
VAPOR) THE ROLE OF EVAPORATION IS THE MOVEMENT OF WATER
MOLECULES FROM THE EARTH’S SURFACE INTO THE ATMOSPHERE
2. How is water purified in the water cycle?
A. sun heats it up
C. it is filtered through different soil layers
B. evoporation
D. bleach
3. What is transpiration?
A. use of a material more than once B. loss of water vapor from a plant
C. a sequence of an event
D. falling precipitation
4. What is water vapor?
(WATER CHANGES FROM A LIQUID INTO A GAS CALLED WATER VAPOR)
WATER IN A GASEOUS STATE.
5. Briefly describe the water cycle.
WATER MOLECULES CONTINUALLY MOVE THROUGH THE WATER CYCLE
IN DIFFERENT FORMS SUCH AS WHEN THE SUN SHINES ON BODIES OF
WATER AND PLANTS. THE HEAT (ENERGY) CAUSES EVAPORATION AND
TRANSPIRATION FROM THE PLANTS CREATING WATER VAPOR THAT
RISES, THE WATER VAPOR THEN CONDENSES INTO FORMS OF WATER
AND FALLS TO THE EARTH AS PRECIPITATION. THE WATER THEN RUNS
OFF OR BACK INTO OCEANS, RIVERS AND STREAMS AND THE WATER CAN
FILTRATE DOWN INTO THE EARTH’S SURFACE (SOILS) AND CAN THEN
CAN COME UP BACK TO EARTH BY SPRINGS, GEYSERS, AND ARTESIAN
WELLS. EVAPORATION THEN BEGINS AGAIN AND THE CYCLE PROCESS
STARTS OVER OR REPEATED AGAIN.
6. What is the difference between salt water and fresh water?
FRESH WATER IS THE WATER FOUND IN LAKES, RIVERS, AND UNDERGROUND
DEPOSITS, POSSESSING LITTLE SALT IN CONTRAST TO THE SALT WATER OF
OCEANS AND SEAS. SALT WATER IS FROM THE OCEANS IN WHICH WE CANNOT
DRINK DUE TO THE HIGH CONCENTRATION OF SALT. WE ALSO CANNOT USE IT
ON VEGETATION, AS THE HIGH SALINITY WILL KILL THE VEGETATION.
7. In the water cycle, water moves from the oceans to the atmosphere by
_______________.
A. evaporation
B. precipitation
C. run off
D. condensation
8. Precipitation that doesn’t evaporate or sink into the ground _________.
A. is not a part of the water cycle.
B. becomes groundwater
C. flows out of the ground as a spring. D. flows into stream as runoff.
9. The water cycle is powered by ____________.
A. oceans and rivers
B. precipitation
C. water table
D. the sun’s heat
10. Where does our drinking water come from?
A. sinkholes
B. aquifers
C. geysers
d. hotsprings
11. What are the four main types of clouds?
Cirrus, stratus, cumulus, and cumulonimbus
12. How do clouds form?
Clouds form after a process of evaporation that forms water vapor in the air. The air
cools as it reaches higher altitudes and then condenses or the maximum amount of water
vapor the air can hold is reduced and water replaces it. Tiny water droplets then can form
around dust, sand or other very tiny solid particles
13. In what layer of the atmosphere, does weather occur?
Troposphere
14. What is the process that condensation has to go through before making a cloud?
The water has to go through the evaporation process and has to rise into the atmosphere.
As the warm air rises, it cools and turns into water molecules (condensation) and the water
molecule nuclei has to cling to a dust particle or a small solid particle and then it becomes
satuarated.
15. Condensation nuclei are involved in the formation of which of the following?
A. cloud droplets
B. ozone
C. dry ice
D. carbon dioxide
16. What are four forms of precipitation?
Rain, snow, sleet, hail
17. Where does water come out of the ground, after it has percolated into the soil?
A. geyser
B. natural spring
C. artesian well
D. all the above
18. What do artesian wells and aquifers always contain?
A. hot water
B. water under pressure
C. salt water
D. steam
19. T or F
Glaciers are an important part of the Earth’s fresh water supply.
20. T or F
The troposphere is the densest layer of the atmosphere.