Biology 3 and 4 review

Front

What is a pyramid of biomass?

Back

A graphical representation showing the amount of biomass at each trophic level in an ecosystem, typically decreasing from the base to the top.

Front

How does the amount of biomass change from the bottom to the top of a biomass pyramid?

Back

The amount of biomass decreases.

Front

What is a food chain?

Back

A linear sequence of organisms through which nutrients and energy pass as one organism eats another.

Front

What is the correct order of a food chain involving grass, snail, bird, and cat?

Back

Grass → Snail → Bird → Cat

Front

What role do greenhouse gases play in the greenhouse effect?

Back

They absorb heat radiated from the Earth's surface and reradiate it, contributing to warming.

Front

What is the relationship between sunlight and the greenhouse effect?

Back

Greenhouse gases absorb heat, and sunlight is the source of energy for that heat.

Front

What is the most useful data for analyzing climate?

Back

Average temperatures for July, measured over 30 years.

Front

Define biotic factors in an ecosystem.

Back

Living components of an ecosystem, such as plants, animals, and microorganisms.

Front

Define abiotic factors in an ecosystem.

Back

Non-living components of an ecosystem, such as temperature, water, and soil.

Front

What is the difference between a food web and a food chain?

Back

A food web is a complex network of interconnected food chains, showing how energy and nutrients flow through an ecosystem.