please help meeee
1.The greenhouse effect occurs when
a. cooling towers malfunction.
b. radiated heat from the Earth is absorbed by the atmosphere.
c. steam heating systems are used.
d. ultraviolet light is absorbed by the atmosphere.


2. In a radiant electric system, heat is produced from
a. electric resistance in cables or wires.
b. thermostats.
c. heat pumps.
d. packed fiberglass.


3. Which of the following is not part of a cooling system?
a. storage tank
b. refrigerant
c. compressor
d. cooling tower


4. Answer:
A cooling tower
a. is controlled by a thermostat.
b. cools water as it flows through pipes.
c. cools water through insulation.
d. causes thermal pollution.
5. Answer:
In passive solar heating,
a. buildings have pipes to circulate hot water.
b. a heat exchanger is needed.
c. buildings are heated directly by the sun.
d. a solar collector absorbs sunlight.