An ecosystem is balanced when
a. energy does not enter or leave the ecosystem.
b. there are an equal number of plants and animals.
c. there is plenty of rain.
d. there are enough resources for every living thing.

Why can't you grow plants with adhesion water?

Which sentence best describes the relationship between chlorophyll and the chloroplast? a.) chlorophyll is a chemical found in a chloroplast. b.) chloroplast is a chemical found in a chlorophyll. c.) both chlorophyll and chloroplasts are found in animals. d.) both chlorophyll and chloroplasts make carbon dioxide.

Which best describes how sediment forms? loose material is cemented by pressure. erosion breaks down rock and other material. molten rock cools above earth's surface. chemical changes cause sediment to compact together.