6. Which form of renewable energy converts sunlight into electricity? hydroelectric

solar power

geothermal

biomass
7. What renewable biomass fuel source has been used for thousands of years?

corn

straw

sugarcane

wood
8. Which renewable form of energy is found in the Earth's crust?

coal

petroleum

geothermal

natural gas
9. What effect does the Earth's surface have on solar radiation?

Half of the solar radiation is absorbed and converted to infrared (heat).

Nearly all solar radiation is reflected back into space by the ground.

The ground absorbs half the solar radiation and stores it as infrared radiation for centuries.
10. Which greenhouse gas has the greatest effect on climate?

nitrous oxide

hydrofluorocarbons

water vapor

carbon dioxide

Iwould google this better

1. true.2. true.3. true.4. false.5. true.the concept of darwin's theory of evolution involves the idea that there are limited resources in a given living environment and that the organisms which live within have variations in their genetic make up due to random mating. the ones with beneficial genetic variations can express certain traits which give them an upper hand in surviving and reproducing in the said environment compared to ones who may have a more disadvantageous variation in traits. over time, the organisms with an upper hand will survive and reproduce more frequently and pass on their beneficial genes while the others die. the result is evolution, where we observe (usually, but not always) eventually, phenotypic distinct changes.