B.13B Intro and Scaffold

What is the primary source of energy for an ecosystem?

• The Moon

• The Sun

• The Earth

• The Ocean

What do arrows in energy models typically represent?

• The speed of energy

• The direction of energy flow

• The amount of energy

• The color of energy

What is a trophic level?

• A type of ecosystem

• A level in a food chain or pyramid

• A type of energy source

• A type of organism

What is the primary role of producers in an ecosystem?

• They consume other organisms for energy.

• They decompose dead organisms.

• They produce their own food through photosynthesis.

• They are at the top of the food chain.

What is the main characteristic of decomposers in an ecosystem?

• They are apex predators.

• They produce their own food.

• They break down dead organisms and waste.

• They are primary consumers.

According to the 10% Rule, what percentage of energy is stored by producers for the next trophic level?

• 100%

• 50%

• 10%

• 1%

What is an ecosystem?

• Only the living things in an area.

• Only the nonliving things in an area.

• All the living and nonliving things in an area.

• Only the plants in an area.

What process do producers use to convert the Sun's energy into chemical energy?

• Respiration

• Photosynthesis

• Fermentation

• Digestion

What happens to energy as it is used by an organism?

• It is completely destroyed.

• It is transformed into thermal energy or other forms.

• It remains unchanged.

• It is doubled.

What can cause an entire ecosystem to collapse?

• Increase in available energy

• Large disruption or reduced amount of available energy

• Increase in apex predators

• Abundance of resources