Topic 1 - Matter can be described and organized by its physical and chemical properties

Question 1

What is evaporation?

Answer 1

Change from a liquid to a gas.

Question 2

What is melting?

Answer 2

Change from a solid to a liquid.

Question 3

What is condensation?

Answer 3

Change from a gas to a liquid.

Question 4

What is freezing?

Answer 4

Change from a liquid to a solid.

Question 5

What is WHMIS?

Answer 5

Workplace Hazardous Materials Information System

Question 6

What is physical properties?

Answer 6

Describes the appearance and composition of a substance.

Question 7

What is a physical change?

Answer 7

Any change not involving a change in the substance`s chemical identity. (can be reversed)

Question 8

What are the few physical properties of matter?

Answer 8

Melting Point, Boiling Point, Hardness, Malleability, Ductility, Crystal shape, Solubility, Density, Conductivity

Question 9

What is Solubility?

Answer 9

Capability of a substance to be dissolved in another.

Question 10

What is Density?

Answer 10

Amount of mass in a given volume of a substance.

Question 11

What is Conductivity?

Answer 11

Capacity of a substance to conduct electricity or heat.

Question 12

What is Hardness?

Answer 12

Ability to resist being scratched.

Question 13

What is Malleability?

Answer 13

Rolled into sheets.

Question 14

What is Melting Point?

Answer 14

Temperature which it changes from solid to liquid.

Question 15

What is Boiling Point?

Answer 15

Temperature which it changes from liquid to gas.

Question 16

What is Chemical Properties?

Answer 16

Explains how a substance relates with other substances.

. ph, Reactivity, Toxicity, Combustibility, Chemical, Behavior in air, Stability

Question 17

What is a Pure Substance?

Answer 17

Made of only one kind of matter.

Question 18

What is ductility?

Answer 18

Stretched into a long wire.

Question 19

What is a Element?

Answer 19

Primary building blocks for all compounds.

Question 20

What is a compound?

Answer 20

Two or more elements combine chemically

Question 21

What is a Mixture?

Answer 21

A combination of pure substances

Question 22

What is a Mechanical Mixture (Heterogeneous Mixture)?

Answer 22

Different substances which form up the mixture are visible.

Question 23

What is a Solution (Homogeneous Mixture)?

Answer 23

Different substances which make up are not visibly split.

Question 24

What is a Suspension?

Answer 24

Cloudy mixture which small particles of one substance are held within another.

Question 25

What is a Colloid?

Answer 25

Cloudy mixture however particles of the suspended particles are tiny which cannot easily split out from the extra substance. Ex. Milk, Ketchup, Whipped Cream, Butter, Jelly

Question 26

What is a Chemical Change?

Answer 26

Happens when two or more materials act and form new materials. (cannot be reversed) Ex. Combustion, mixing an acid and a base, Photosynthesis, Iron Rusting

Question 27

What are Evidences of a Chemical Change?

Answer 27

``` Evidence of Chemical Change Change in Colour Change in Odour The Formation of Solid & Gas Thermal Energy Release or the Absorption of Heat Energy ```

Question 28

What is an exothermic reaction?

Answer 28

It releases energy

Question 29

What is an endothermic reaction?

Answer 29

absorb energy which is warm or cold

Question 30

What is MRE?

Answer 30

Meals Ready To Eat

Question 31

What are examples of a physical change?

Answer 31

- Changes of State - Dissolving - Absorption of water into a towel - Crumpling a piece of paper - Pulling copper into a thin wire - Cutting a material - Breaking glass - Writing on a Sheet of Paper

Question 32

What are examples of a chemical change?

Answer 32

Combustion, mixing an acid and a base, Photosynthesis, Iron Rusting

Question 33

What is an element?

Answer 33

Basic building blocks of all compounds

Question 34

What is a compound?

Answer 34

Made of only one kind of matter