Key 7th Grade Science Vocabulary

SI unit of force

Simple machine in which a bar that pivots on a fixed point.

In an experiment it is the factor that is measured or responds; data collected on this variable

Statement about how things work in nature that is true consistently (rule in science).

Curved surface of a liquid, such as water, where it meets the sides of its container

Data that deals with descriptions; qualities observed with the senses

Point on Earth's surface directly above an earthquake

Transfer of thermal energy in fluid (gas or liquid), in which warmer fluid raises to the top and cold sinks.

Simple machine that resembles a moving inclined plane that will split, divide or life a load.

Smallest and most basic unit of structure and function in an organism.

Any push or pull, of any size

Measure of average heat energy.

A factor in an experiment that is being tested, manipulated (I decide to test).

Structures in the cell's cytoplasm that carry out cell activities.

Data is measured with numbers such as mass, area, and time.

Compound that produces hydrogen ions in water, raises the pH about 7.

A factor that can change in an experiment

Fracture within the Earth's rocky crust, where the rocks slide past each other

A compound that produces hydrogen ions in water, lowers the pH to below 7.

Molten rock flowing onto Earth Surface

A risk you accept to gain a benefit

Organelle in a cell that is the control center and contains the cell's DNA.

Hot molten rock material beneath Earth's surface

A liquids resistance to flow

Explanation of things or events based on scientific knowledge resulting from observations and experiments