Science 2nd Semester Exam Prep

Earth's atmosphere is composed mostly of_____.

• nitrogen

• carbon dioxide

• oxygen

The ozone layer _____ solar ultraviolet radiation

• intensifies

• creates

• filters out

Humidity refers to the amount of _______ in the air.

• pollutants

• dust

• moisture

A hurricane develops __________.

• in the mountains

• at the poles

• over water

Climate refers to _____ weather.

• long term

• moment to moment

• short term

The heat in the greenhouse effect comes from ________

• desert habitats

• the center of the earth

• solar radiation

An animal is a ________.

• hard rock

• living thing

• large building

Photosynthesis takes place in the_______ of a plant.

• leaves

• flowers

• roots

An amino acid combines with others to form _____.

• long chains

• short chains

• molecules

Glucose is made by _____.

• animals

• plants

• both plants and animals