Top 2.3 How can we describe and explain the states of matter?

Question 1

What is matter?

Answer 1

Matter is anything that has mass and volume.

Question 2

What is mass?

Answer 2

Mass is the quantity of matter a substance or object contains.

Question 3

How is mass measured?

Answer 3

Mass is usually measured in grams(g) or kilograms(kg).

Question 4

What is volume?

Answer 4

Volume is the amount of space taken up by a substance or object.

Question 5

How is volume measured?

Answer 5

Volume is usually measured in millimetres(mL), litres(L), or and cubic.

Question 6

What are solid like?

Answer 6

A solid has a fixed mass, a fixed volume, and a fixed shape.

Question 7

What are liquids like?

Answer 7

A liquid has a fixed mass, a fixed volume, but not a fixed shape.

Question 8

What are gas like?

Answer 8

A gas has a fixed mass, but not a fixed volume or shape.

Question 9

What is plasma like?

Answer 9

Plasma does not have a defined shape and volume (similar to gas), has different electrical properties than gases.

Question 10

What are some examples of plasma?

Answer 10

The sun, the visible fork of a lightening bolt, and he glowing gas of a neon sign.

Question 11

What is the particle model of matter?

Answer 11

1. All matter is made up of small particles that are too small to see
2. There are spaces betwen the particles. The amount of space varies depending upon the state
3. The particles are always moving
4. The particles are attracted to one another

Question 12

What is kinetic energy?

Answer 12

Kinetic energy is the energy due to motion.

Question 13

What is the Kinetic Molecular Theory?

Answer 13

The Kinetic Molecular Theory (KMT) explains what happens to matter when the kinetic energy of the particles change.
The main points of the kinetic molecular theory include:
1. All matter is made up of very small particles
2. There is empty space between particles
3. Particles are constantly moving. The particles are colliding with each other and the walls of their container
4. Energy makes particles move. The more energy the particles hae, the faster they move and further apart they get

Question 14

KMT and the States of Matter, Solid.

Answer 14

The particles are so tightly packed they cannot move freely. They can only vibrate.

Question 15

KMT and the States of Matter, Liquid

Answer 15

The particles are farther apart and they can move by sliding past each other.

Question 16

KMT and the States of Matter, Gas

Answer 16

The particles are very far apart and move around quickly.

Question 17

What is thermal expansion?

Answer 17

Thermal expansion is the increase in volume of a substance when it’s temperature is raised.