Matter & Its Interactions Unit Review

Gravitational force with which the Earth attracts the masses towards its center.

The amount of matter within an object.

____ has mass and takes up space.

A ____ has a constant defined composition and cannot be separated by physical means.

Smallest unit of an element that has the properties of that element.

element may combine chemically to form _____?

Smallest unit of a compound that has the properties of that compound.

Substances are either uniform of not.

Keeps its properties, can be separated by physical means.

Same concentration throughout, or uniform.

Solution, air, sugar water, salt water.

Substances are not evenly distributed.

Soil, rocky road ice cream.

Can be detected by senses.

Color, luster, density, malleability, boiling point, melting point.

Properties that can only be observed by doing a chemical reaction.

Flammability, heat of combustion, reactivity.

There is no change in the identity of the material.

Something cut in half, change states of matter.

There is a new substance created, atoms are rearranged into new products.

Iron rusting, wood burning, baking bread in the oven.

completely isolated from its environment.

Can not be used to prove matter is conserved during a chemical reaction or phase change. Substances can escape from container.

Reactants

_____ is made of particles in constant motion, which have kinetic energy in them.

_____ is particle motion in a substance that is affected by the flow of heat.

Temperature rises, particles move faster.

A solid changing into liquid.

Liquid changing into gas.

Temperature decreases, particles move slower.

Liquid changing into a solid.

Gas changing into a liquid.

____ always moves from areas of warmer objects to cooler objects until they reach thermal equilibrium.