MULTIPLE CHOICE: Choose the letter of the correct answer.

1. The biogeochemical cycle that involves various changes in the states of water as it moves through different ecosystems on the Earth is commonly referred as the _____ .
A. water cycle
B. water scarcity
C. water revolution
D. rainwater harvesting

2. Which is in the correct order?
A. Evaporation, Precipitation, Run – off, Condensation
B. Condensation, Evaporation, Precipitation, Run – off
C. Evaporation, Condensation, Precipitation, Run – off
D. Precipitation, Run – off, Evaporation, Condensation
3. The plants and trees also lose water to the atmosphere in the form of vapor is called _____ .
A. evaporation
B. transpiration
C. soil infiltration
D. condensation
4. After water vapor is carried high into the atmosphere, what happens to it? It _____.
A. keeps rising
B. sublimes into ice
C. changes back into water
D. forms clouds and air currents move them around

5. What is the fresh water running underground called?
A. river
B. creek
C. aquifer
D. stream

6. A student added white crystals to a clear liquid. The crystals dissolved in the liquid. After a few seconds, the liquid became quite warm and then turned bright red in color. What indications that chemical change has taken place? The _____ .
A. white crystals escaped out of the liquid
B. white crystals were added to the clear liquid
C. crystals dissolved in the liquid leaving only the liquid visible
D. temperature of the liquid increased, and an unexpected color change occurred

7. A student observes some sugar as it is heated and burned. He concluded that a chemical reaction has occurred. Which observations about the burning sugar provides evidence of chemical change?
A. Heat is added to the sugar crystals.
B. The sugar melts and become a liquid.
C. Gas is produced as the sugar turns black.
D. The sugar melts become a liquid and turn brown.

8. Bethany had a beaker with a small amount of baking soda. She added a few drops of pickle juice to the baking soda and observed fîzzing and búbbling. Based on her observation, which of these can determine about the new substance formed by mixing the baking soda and pickle juice?
A. Only physical change happened.
B. No chemical reaction took place.
C. A chemical reaction produced a gas.
D. A chemical reaction produced a solid.

9. A granular substance is added to a liquid. Which would provide evidence to suggest that a chemical change has taken place? The _____ .
A. liquid gives off heat.
B. granúles seem to get smaller.
C. granúles dissolved completely.
D. volume of the liquid decreases.

10. When two liquids are mixed and a solid form because of a reaction. What evidence of chemical change is visible?
A. Production of light
B. Evolution of bubbles
C. The volume increases
D. Formation of a precîpitáte

11. What happened to the substance after chemical change?
A. still the same
B. change in phase
C. form new substances
D. change its physical properties only

12. What do happen to the properties of the new substances after chemical change?
A. Still the same
B. Chemical properties were change
C. Physical properties were changed.
D. Physical and chemical properties were changed


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