module 3.1

What are autotrophs?

• Organisms that produce their own food from inorganic sources

• Organisms that break down dead organic matter

• Organisms that rely on external energy sources

• Organisms that consume other organisms

What is biomagnification?

• The process of energy transfer in a food chain

• The movement of nutrients in biogeochemical cycles

• The increasing concentration of toxic substances in higher trophic levels

• The breakdown of organic matter by decomposers

Which of the following is a primary producer?

• A rabbit

• A lion

• A plant

• A mushroom

What do ecological pyramids represent?

• The energy flow in a food web

• The relationship between trophic levels in an ecosystem

• The diversity of species in an ecosystem

• The population size of organisms

What is the role of decomposers in an ecosystem?

• To compete with primary consumers for resources

• To produce energy through photosynthesis

• To consume primary producers

• To break down dead organic matter and recycle nutrients

What is the definition of a food web?

• A linear sequence of energy transfer

• A representation of energy flow in a single food chain

• A complex network of interconnected food chains

• A diagram showing energy loss at each trophic level

Which of the following describes kinetic energy?

• Energy stored in an object's position

• Energy of motion

• Energy that cannot be transformed

• Energy derived from chemical reactions

What is the first law of thermodynamics?

• Energy can be created from matter

• Energy cannot be created or destroyed, only transformed

• The entropy of a closed system always decreases

• Energy is always lost in transformations

What is photosynthesis?

• The process by which autotrophs capture light energy and convert it into chemical energy

• The breakdown of organic matter by decomposers

• The synthesis of inorganic compounds

• The process of energy transfer in a food chain

What is entropy?

• A process of energy capture by autotrophs

• A measure of disorder or randomness in a system

• A type of energy transformation

• A measure of energy in a system