Chapter 4 😀

Question 1

Matter (deffinition)

Answer 1

Matter is anything that takes up space and can be weighed. In other words, matter has volume and mass. There are many different substances, or types of matter, in the universe.

Question 2

How Does Matter Change From One State To Another?

Answer 2

Matter changes state by adding or removing energy.

Question 3

Solid - Liquid

Answer 3

Melting.

Question 4

Liquid - Gas

Answer 4

Evaporation.

Question 5

Gas- Solid

Answer 5

Deposition

Question 6

Gas - Liquid

Answer 6

Condensation.

Question 7

Liquid - Solid

Answer 7

Freezing.

Question 8

Solid - Gas

Answer 8

Sublimation.

Question 9

What Is The Particle Theory.

Answer 9

1. All matter is made up of tiny particles known as atoms.
2. Particles of matter are constantly in motion.
3. Particles of matter attract each other.
4. Particles of matter have spaces between them.
5. As temperature increases, particles of matter move faster.
6. Atoms of the same element are identical and atoms of different elements are different.

Question 10

Physical Properties are?

Answer 10

Characteristic or description of a substance that can be observed (qualitative) or measured (quantitative) without changing the composition of the substance

Question 11

Colour and Lustre:

Answer 11

the light a substance reflects gives it colour and lustre

Question 12

Conductivity:

Answer 12

ability of a substance to conduct electricity or heat. A substance that does not conduct is called an insulator and if it does, a conductor

Question 13

Density:

Answer 13

amount of mass in a given volume (g/cm3 )

Question 14

Ductility:

Answer 14

any solid that can be stretched into a long wire

Question 15

Hardness:

Answer 15

substance’s ability to resist being scratched. Measured on the Mohs hardness scale.

Question 16

Malleability:

Answer 16

Can be pounded into sheets

Question 17

Viscosity:

Answer 17

resistance of a fluid to flow

Question 18

Clarity:

Answer 18

how transparent, translucent or opaque something is.

Question 19

Chemical propertes are?

Answer 19

The ability of a substance to change into a new substance(s) Can only be observed when a chemical change takes place
Chemical changes always result in the formation of a new substance. The process in which a chemical change occurs is called a chemical reaction.

Question 20

Examples of Chemical Properties Include.

Answer 20

Absorbs or emits energy during a reaction (light or heat)
Combustibility/Flammability
Decomposition
Forming gases when heated
Reacts with acid/base; water; oxygen
Forms a precipitate (solid) in solution

Question 21

Carbon Dioxide Will React How To A Gas Test and to limewater.

Answer 21

Flaming splint goes out. And lime water will turn white/cloudy.

Question 22

How Will Hyrdogen React To A Flame Test.

Answer 22

Flaming splint explodes with a POP!

Question 23

How Will Oxegen React To A Flame Test.

Answer 23

glowing splint relights

Question 24

How Will Water Vapour react to a flame test and to lime water

Answer 24

Water vapour will put out a glowin splint but instead of turning limewater white, Water Vapour will turn cobalt chloride paper pink.

Question 25

A homogeneous Mixture Is?

Answer 25

A mixture with only 1 visible phase.

Question 26

A heterogeneous mixture is?

Answer 26

A mixture with two or more phases.

Question 27

A Pure Substance Is?

Answer 27

A homogenous mixture that is either: an element, or a compound.

Question 28

The smallest part of an element/compound is?

Answer 28

an atom/molecule.