Matter

Question 1

A type of matter with a fixed composition. It can be either element or compound.

Answer 1

Substance

Question 2

If all the atoms in a substance have the same identity.

Answer 2

Element

Question 3

A substance in which the atoms of two or more elements are combined in a fix proportion.

Answer 3

Compound

Question 4

A mixture in which different materials can be distinguished easily.

Answer 4

Heterogeneous mixture

Question 5

Contains two or more gaseous, liquid, or solid substances blended evenly throughout.

Answer 5

Homogeneous mixture

Question 6

A homogeneous mixture of particles so small that they cannot be seen with a microscope and will never settle to the bottom of the container.

Answer 6

Solution

Question 7

A type of mixture with particles that are larger than those in solutions but not heavy enough to settle out.

Answer 7

Colloid

Question 8

The scattering of light by colloidal particles.

Answer 8

Tyndall effect

Question 9

A heterogeneous mixture containing a liquid in which visible particles settle.

Answer 9

Suspension

Question 10

Any characteristic of a material that you can observe without changing the identity of the substances that make up the material.

Answer 10

Physical property

Question 11

A change in size, shape, or state of matter.

Answer 11

Physical change

Question 12

The process for separating substances in a mixture by evaporating a liquid and reconsidering its vapor.

Answer 12

Distillation

Question 13

A characteristic of a substance that indicates whether it can undergo a certain chemical change.

Answer 13

Chemical property

Question 14

A change of one substance to another.

Answer 14

Chemical change

Question 15

The mass of all substances that are present before a chemical change equals the mass of all the substances that remain after the change.

Answer 15

Law of Conservation of Mass

Question 16

An explanation of how particles in matter behave.

Answer 16

Kinetic Theory

Question 17

The temperature at which a solid begins to liquefy

Answer 17

Melting Point

Question 18

The amount of energy required to change a substance from the solid phase to the liquid phase at its melting point.

Answer 18

Heat of fusion

Question 19

The temperature at which the pressure of the vapor in the liquid is equal to the external pressure acting on the surface of the liquid.

Answer 19

Boiling point

Question 20

The amount of energy required for the liquid at its boiling point to become a gas.

Answer 20

Heat of vaporization

Question 21

The spreading of particles throughout a given volume until they are uniformly distributed.

Answer 21

Diffusion

Question 22

Matter consisting of positively and negatively charged particles.

Answer 22

Plasma

Question 23

An increase in the size of a substance when the temperature is increased.

Answer 23

Thermal expansion

Question 24

The ability of a fluid- a liquid or a gas- to exert an upward force on an object immersed in it.

Answer 24

Buoyancy

Question 25

A force exerted per unit area, or P= FI A.

Answer 25

Pressure

Question 26

The resistance to flow by a fluid.

Answer 26

Viscosity

Question 27

The SI unit of pressure.

Answer 27

Pascal