a difficult or dangerous situation that needs serious focus
15
Population is…
A math solution
number of people living in a country, city, or area
A beverage
20
What is the definition of disease?
A natural event like an earthquake
Condition that makes you unhealthy
Condition that makes you healthy
20
What is poison?
any substance that is harmful to your body
A rock and roll band from the 1980s
A traditional Polish dish
15
Water covers what percent of the earth’s surface?
70%
90%
80%
15
What are impurities?
tiny bits of a different substance
The same substance
A mixture of liquids
25
Can we get water from the air?
No
Yes
15
What is condensation?
process of changing from a gas to a liquid
process of changing from a liquid to a gas
process of changing from a solid to a gas
20
Can clean water be taken from polluted air?
No
Yes
15
The United Arab Emirates have a huge project planned to get water from what source?
Icebergs
air
groundwater
20
What is the name of the method of filtering pure water molecules out of salt water or polluted water by forcing the water through a semipermeable membrane?