Chapter 8 Science Test

What element is important for living things to grow and function normally?

• oxygen

• nitrogen

• carbon dioxide

• photosynthesis

What is the name for a regular pattern of change?

• a pattern

• a cycle

• a food chain

• seasons

The year is divided into ______, which is an example of a cycle

What gas is released in the air during decomposition?

• hydrogen

• oxygen

• carbon dioxide

• nitrogen

Do fires ever benefit an ecosystem?

• yes

• no

Are all stresses manmande?

• yes

• no

The parts of the water cycle include precipitation, __________, evaporation, and condensation.

What is the process by which people and animals breathe in oxygen and breathe out carbon dioxide?

• transpiration

• evaporation

• respiration

• condensation

During respiration organisms use ______ molecules and oxygen to produce energy

There is usually only a wet and a dry season in areas of the earth that have only two seasons.

• True

• False