Fourth Grade Science Review - Life Sciences

Life Sciences: Organisms

Main concept: All organisms need energy and matter to live and grow.

A. Are plants the primary source of matter and energy entering most food chains? What is matter? What is energy? What are food chains?

B. How are producers and consumers (herbivores, carnivores, omnivores, and decomposers) related in food chains and food webs? Do they compete with each other for resources in an ecosystem? What are producers? What are consumers? What are herbivores? What are carnivores? What are omnivores? What are decomposers? What is a food web? What is an ecosystem?

C. What do decomposers, such as many fungi, insects, and microorganisms, do with dead plants and animals? What are fungi? What are insects? What are microorganisms?


Life Sciences: Organisms

Main concept: Living organisms depend on one another and on their environment for survival.

A. What are the living and nonliving components of an ecosystem? Give examples using two different ecosystems.

B. In a particular environment, do some kinds of plants and animals survive well? In that same environment, do some kinds of plants and animals survive less well? In that same environment, do some kinds of plants and animals not survive at all? Give examples of all three situations.

C. Do some plants depend on animals for pollination and seed dispersal? Do some animals depend on plants for food and shelter? Give examples of each. What is pollination? What is seed dispersal?

D. Do most microorganisms cause disease? Are many microorganisms beneficial? Give examples of microorganisms that do not cause disease. Give examples of microorganisms that are beneficial.

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