Kinetic Molecular Theory

Question 1

Particles

Answer 1

a minute portion of matter.

Question 2

Pure substance

Answer 2

is a form of matter that has a constant composition and properties that are constant throughout the sample

Question 3

temperature

Answer 3

the average kinetic energy of the particles of matter. When particles of matter move more quickly, they have more kinetic energy, so their temperature is higher

Question 4

solid

Answer 4

The molecules in a solid are closely packed together and contain the least amount of kinetic energy

Question 5

liquid

Answer 5

one of the states of matter. The particles in a liquid are free to flow, so while a liquid has a definite volume, it does not have a definite shape.

Question 6

Gas

Answer 6

A gas is one of the four fundamental states of matter consisting of particles that have neither a defined volume nor shape.

Question 7

Phase change

Answer 7

a change from one state (solid or liquid or gas) to another without a change in chemical composition

Question 8

Thermal Energy

Answer 8

is produced when a rise in temperature causes atoms and molecules to move faster and collide with each other. The energy that comes from the temperature of the heated substance is called thermal energy

Question 9

kinetic energy

Answer 9

the kinetic energy of an object is the energy that it possesses due to its motion

Question 10

absolute zero

Answer 10

the lowest temperature that is theoretically possible, at which the motion of particles that constitutes heat would be minimal. It is zero on the Kelvin scale, equivalent to –273.15°C or –459.67°F.