at a higher place than something else
Raise your hand above your head.

to take in a liquid or other substance
The dry sponge absorbs water on the floor.

to speak or act in response
You should answer my question quickly.

to provide reasoning
She explained the problem to me.

a form of energy or brightness that comes from a source (such as the sun or a lamp) and makes it possible to see things
It's too dark, here. Turn the light off, please.

the simplest unit of a chemical substance, usually a group of two or more ATOMS
A molecule of water consists of two atoms of hydrogen and one atom of oxygen.

to BOUNCE back, as of light, heat, or sound
The moon reflects light from the sun.

to place or leave things in various places
We scattered seeds on the ground for the birds.

a particular area of study within the field of science, such as physical science
We get together and study math and science on Thursdays.

to know the meaning of the words that someone is saying or the language that he or she is speaking
This book is too difficult for me. I can't understand it, at all.