The amount of matter in an object

A measure of the force gravity exerts on an object

The overall force exerted on an object measured in Newtons

Equal forces that do NOT cause a change in the object's motion

Unequal forces that cause a change in the object's motion - speed or direction

The units used for force

A force that resists motion when two surfaces are touching eachother

An force that pulls objects that have mass toward one another

The frictional force air exerts against a moving object

The scientist credited with the three laws of motion (He also invented calculus)

Any change in the location of an object

An object at rest will remain at rest and an object in motion will remain in motion until acted on by an unbalanced force.

The force of an object is equal to its mass multiplied by its acceleration

For every action, there is an equal and opposite reaction

An object's tendency to resist a change in motion

The distance an object travels per unit of time

The total distance an object travels divided by the total time it travels

Speed that remains the same or does not change

Speed in a given direction

All of space and everything in it

A huge system of millions or billions of stars, together with gas and dust held together by gravity.

A flat, disk-shaped galaxy with a central bulge and “arms” that extend outward.

The most abundant type of galaxy that has a smooth, circular, or oval shape

A random, scattered type of galaxy that does not form a distinct shape or pattern

A large, rock-shaped object in space that orbits the Sun – smaller than a planet.

Chunks of ice and dust traveling through space.

A rocky object that produces a streak of light in the sky as it enters Earth’s atmosphere – known as a “shooting star.

Long chains of molecules that make up chromosomes.

The location where genetic information is stored within the nucleus of a cell.

A segment of DNA that has the code for a specific trait

One of a pair of genes that controls a certain characteristic.

The specific genetic makeup or “code” for an individual.

The total physical appearance for an individual.

The physical features of an organism that help it survive.

The way an organism acts in order to help it survive.

An adaptation that allows an organism to perform special functions within the body.

Disturbances that transfer energy from place to place.

A type of wave that moves the medium at a right angle to the direction in which the wave travels.

A type of wave that displaces the particles of the medium parallel to the direction in which the wave travels.