Why is each level of the energy pyramid smaller than the level directly below it?(1 point)
Responses
Because 10% of the energy at each level moves to the next level and some additional energy is converted to heat.
Because 10% of the energy at each level moves to the next level and some additional energy is converted to heat.
Because about 10% of the energy is converted to heat when organisms become ill and another 10% when they die.
Because about 10% of the energy is converted to heat when organisms become ill and another 10% when they die.
Because the sizes of each level show that 10% is consumed by organisms at that level.
Because the sizes of each level show that 10% is consumed by organisms at that level.
Because 90% of the energy is passed on to the next level to be used by the organisms there.
Because 90% of the energy is passed on to the next level to be used by the organisms there.
Because 90% of the energy is passed on to the next level to be used by the organisms there.
Which type of organism is the first organism in an energy pyramid or food chain?(1 point)
Responses
secondary consumer
secondary consumer
primary consumer
primary consumer
producer
producer
tertiary consumer
What nonliving part of an ecosystem plays a major role in the cycling of energy?(1 point)
Responses
soil
soil
water
water
plants
plants
sun
sun
How is the majority of carbon transferred from plants and animals to the soil? (1 point)
Responses
The decay of dead organisms releases some carbon atoms from their bodies into the soil.
The decay of dead organisms releases some carbon atoms from their bodies into the soil.
The decay of dead organisms releases carbon dioxide from their bodies into the soil.
The decay of dead organisms releases carbon dioxide from their bodies into the soil.
Carbon atoms from plant and animal waste dissolve into the soil.
Carbon atoms from plant and animal waste dissolve into the soil.
Carbon dioxide from plant and animal respiration dissolves into the soil.
The decay of dead organisms releases some carbon atoms from their bodies into the soil.
Is all of Earth’s carbon dioxide supply constantly being used by organisms?(1 point)
Responses
No, some is stored in Earth’s carbon sinks, such as the oceans.
No, some is stored in Earth’s carbon sinks, such as the oceans.
No, some is stored in Earth’s only carbon sink, the atmosphere.
No, some is stored in Earth’s only carbon sink, the atmosphere.
Yes, and it briefly passes through the atmosphere as it cycles between organisms.
Yes, and it briefly passes through the atmosphere as it cycles between organisms.
Yes, and it is used up as soon as it is formed.
No, some is stored in Earth’s carbon sinks, such as the oceans.
Which of these is the largest living carbon sink?(1 point)
Responses
soil
soil
insects
insects
forests
forests
ocean