Unit 4: Sources and Flow of Energy TEST CORRECTIONS

Front

How does energy enter into the ecosystem?

Back

Energy enters the ecosystem primarily through photosynthesis, where phytoplankton convert radiant energy into food.

Front

What role do fungi, protists, and bacteria play in biogeochemical cycles?

Back

These organisms return basic nutrients back to the ecosystem so that they can be used by other organisms.

Front

What is the process by which deep water ocean currents transfer energy?

Back

Energy flows through deep water ocean currents primarily due to convection.

Front

In an energy pyramid, which trophic level contains the least amount of energy?

Back

The trophic level with the least amount of energy is typically the top predators, such as lynx.

Front

What is an example of energy transformation in an ecosystem?

Back

An example of energy transformation is the conversion of light energy to chemical energy during photosynthesis.

Front

Define photosynthesis.

Back

Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll.

Front

What is the significance of phytoplankton in marine ecosystems?

Back

Phytoplankton are crucial as they form the base of the marine food web and are primary producers that convert sunlight into energy.

Front

Explain the concept of energy flow in an ecosystem.

Back

Energy flow in an ecosystem refers to the transfer of energy from one trophic level to another, starting from producers to various levels of consumers.

Front

What is the difference between conduction, convection, and radiation?

Back

Conduction is the transfer of heat through direct contact, convection is the transfer of heat through fluid movement, and radiation is the transfer of energy through electromagnetic waves.

Front

What is a trophic level?

Back

A trophic level is a position in a food chain or food web, representing the flow of energy and nutrients from producers to various levels of consumers.