Chapter 3 Matter And Energy

Question 1

What is a solid?

Answer 1

Solids have a definite shape and could. Also their molecules are packed tightly together and only vibrate.

Question 2

What is a liquid?

Answer 2

Liquids have a definite volume, but they change shape and take the shape of their container. Also their particles move more rapidly.

Question 3

What is a gas?

Answer 3

The particles in a gas move more rapidly than solids and liquids. Gas expands to fill the available space.

Question 4

What is plasma?

Answer 4

A state of matter that begins as a gas but becomes ionized.

Question 5

What is energy?

Answer 5

Energy is doing work.

Question 6

What is thermal energy?

Answer 6

Thermal energy is the kinetic energy of atoms in a substance.

Question 7

What is evaporation?

Answer 7

Evaporation is when a liquid changes into a gas.

Question 8

What is sublimation?

Answer 8

Sublimation is where a solid changes into a gas. (The reverse process)

Question 9

What is condensation?

Answer 9

Condensation is when a gas changes to a liquid.

Question 10

What is a fluid?

Answer 10

A fluid is a state of matter and is not a solid and the atoms move past each other freely as in a liquid or gas.

Question 11

What is a buoyant force?

Answer 11

A buoyant force is a force exerted upward on an object immersed in or floating on a fluid.

Question 12

What is pressure?

Answer 12

Pressure is the amount of force exerted per unit area of a surface.**

Question 13

What is Archimedes’ principle?

Answer 13

The buoyant force is an upward force on an object in a fluid and the force is equal to the weight of the volume of the fluid.

Question 14

What is pascal?

Answer 14

SI unit of pressure.

Question 15

What is Pascal’s principle?

Answer 15

Principle that states that a fluid in equilibrium contained in a vessel exerts a pressure of equal intensity in all directions.

Question 16

What is viscosity?

Answer 16

The flow resistance of a gas or liquid.

Question 17

What is a crystalline solid?

Answer 17

Crystalline solids don’t have to be crystals. They have an array net order of atoms or molecules. Examples are salt or a desk.

Question 18

What is a amorphous solid?

Answer 18

An amorphous solid are rubbery or stretchy substances like butter or gum. They the atoms or molecules have no order.

Question 19

What is surface tension?

Answer 19

Property of liquids/ force acting on the molecules at the surface of the liquid that causes a liquid.

Question 20

What is Archimedes principle?

Answer 20

Mass of water displaced=mass/volume of objects. The upward force on the object in the water is equal to the weight of the volume of the fluid that the object displaces.

Question 21

What is Charle’s law?

Answer 21

States for a fixed amount of pressure the temperature decreases as volume increases.

Question 22

What is Boyle’s law?

Answer 22

For a fixed amount of gas at a constant temperature volume increases as its pressure decreases.