Question

in order to survive, ecosystems need five basic components. which of the following answers is not one of these components?
a living organisms
b carbon dioxide
c mineral nutrients
d energy

1. what is the difference between evaporation and condensation?

a evaporation is the process where water is heated by the sea; condensation is the process where water droplets fall from clouds
b evaporation is the process where water vapor forms droplets; condensation is the process where water vapor forms clouds
c evaporation is the first stage in the water cycle; condensation is the last stage
d evaporation is the change from water to vapor; condensation is the change from vapor to water

1. which of the following answers describes an aspect of natural selection according to darwin?

a some inherited traits provide organisms with an advantage
b organisms differ in the traits they have
c organisms produce more offspring than can survive
d all answers are correct

Explanation:

• Question 7: Ecosystems need living organisms (biotic component), energy (e.g., from the sun), mineral nutrients (for growth), and water (not carbon dioxide as a basic component in the way the question implies).
• Question 8: Evaporation is the change of water from liquid to vapor (e.g., water on a surface turning into vapor when heated), and condensation is the change of vapor to liquid (e.g., water vapor in the air forming droplets).
• Question 9: Darwin's natural selection includes that organisms differ in traits (variation), some inherited traits give an advantage (survival of the fittest), and organisms over - produce offspring (leading to competition).

Answer:

• Question 7: B. carbon dioxide
• Question 8: D. Evaporation is the change from water to vapor; condensation is the change from vapor to water
• Question 9: D. all answers are correct