8th Grade Science PSSA Prep #1

A mixture of gases that surrounds a planet or moon.

Water that fills the cracks and spaces in underground soil and rock layers.

A resource that cannot be replaced.

This is energy from the sun.

An organism that obtains energy by feeding on other organisms.

A low area between mountains or hills where streams and rivers often flow.

Ecosystems of several types in which vegetation is surrounded by still water in swampy areas.

A system formed by the interaction of a community of organisms with their physical environment

The path that an object follows as it travels around another object in space.

Liquid magma that reaches the surface.

An underground formation that contains groundwater.

What does the word agriculture means?

A method of planning or conducting a scientific study to answer a question or problem.

A natural resource that can be replaced or replenished.

The area of land that is drained by a water system. It is separated by mountain ranges.

The process by which plants use the sun's energy to convert water and carbon dioxide into sugars.

A series of steps in which organisms transfer energy by eating and being eaten.

The breaking down of organic matter.

A group of related parts that work together.

Changing to fit new conditions.

A simplified version of something that is complex.

All of the many factors that influence and affect life in an area.

The release of harmful materials into the environment

The process of grouping organisms together by similar traits.

A body of land with water surrounding it on three sides.