PSSA Science Review

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

hand held device used to magnify materials during observations

A measure of the amount of matter in an object

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

An explanation based on your observation or measurement

Anything that has mass and takes up space

It is a force that pulls an object toward Earth.

is like a pathway made of wires that electrons can flow through

Any standard instrument of measurement- marked at established intervals (size, distance)

A mixture of gases that surrounds a planet or moon.

Change in a kind of organism over time

A measure of how hot or cold something is

instrument used to measure temperature

A simplified version of something complex used (analyze, solve problems or make predictions.)

An open cylindrical container with a pouring lip; used for mixing larger amounts of substances

A state of matter that has a definite volume but no definite shape.

The breaking down of organic matter.

a natural resource that can be replaced

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

An organism that obtains energy by feeding on other organisms

the area of land that is drained by a water system. Separated by mountain ranges

Energy from the sun

Change in state from a gas to a liquid, usually caused by cold air

A living thing

information obtained through the senses.

agriculture means...

A group of related parts that work together

A change that affects the appearance but not the chemical makeup of a substance.

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

Amount of space occupied by an object

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

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

An underground formation that contains groundwater

A state of matter in which the object has a definite shape and volume.

Plants use the sun's energy to convert water and carbon dioxide into sugars

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

a resource that cannot be replaced

The change of a liquid to a gas

A change in which one or more substances combine or break apart to form new substances.

the ability of a material to allow either heat or electricity to flow through it

characteristics that can be observed, measured, or changed and used to identify matter.

Release of harmful materials into the environment

A personal belief or judgment that cannot be proven true

A changing to fit new conditions

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

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

liquid magma that reaches the surface; also the rock formed when liquid lava hardens.

Water in the form of a gas

the task of grouping organisms together by similar traits,