What is a chemical equation? 1.A short way to show a chemical reaction using symbols.
2.A way to show a physical change using symbols. 3.A way to explain a chemical reaction using words.
4.A way to show a physical change using words.

plants need sunlight, water, and carbon dioxide to make food. plants use the raw materials of water, nutrients they absorb from soil, and carbon dioxide to make sugars the plant can use. energy from the sun and chlorophyll are also needed.

i do not get it   at all

answerca air mass;