The digestion process begins in which of the following?
A: mouth

What would be the result of adding one proton to an atom?
A: the atomic number would change

Earthworms live underground in the soil. As they move through the soil, they create tunnels. The tunnels help improve the soil. Plants grow better in soil that has earthworms. Which statement explains how earthworm tunnels help plants?
A: Earthworm tunnels loosen the soil so plant roots can easily grow

A solar cell turns sunlight into another form of energy. A solar cell is most like what natural structure?
A:
a plant's leaves