A is the answer. You would need soil with different amounts- including no amount- to determine how the fertilizer affects the plants
Since you are measuring the height a ruler would be a good idea as well.
birds
hummingbird because of its wing speed
1. Radiation - energy transmits through particles that ionize. Conduction - heat is transferred through a substance without moving the material. Convection - transfer of heat through movement.
2. Earth receives energy from the sun, which is transferred between Earth and its atmosphere.
3.<span>Wildland fires, dust storms, and volcanic activity. They release CO2, CH4, N20, and sulfur dioxide.</span>
4. Burning coal, releases carbon dioxide and other pollutants. Gasoline, releases air pollution. Factories, releases carbon dioxide, methane, and nitrous oxide.
Incomplete Dominance! I just took the mastery test and got 100 %
