Matter

Question 1

What is matter?

Answer 1

matter is anything that has mass and takes up space (volume)

Question 2

All matter has 2 things in common

Answer 2

mass and volume

Question 3

What is mass?

Answer 3

the amount of matter in an object or sample

Question 4

What is volume?

Answer 4

the amount of space that a material takes up.

Question 5

How can matter be described?

Answer 5

based on its physical and chemical properties

Question 6

Physical properties:

Answer 6

characteristics of matter that can be observed or measured without changing its chemical identity.

Question 7

Chemical properties: (two things)

Answer 7

-ability of matter to react with another substance to form one or more new substances.
-can only be observed what a substance chemically interacts, or reacts with.

Question 8

Melting point:

Answer 8

the temp at which a substance changes from solid to liquid state

Question 9

Boiling point:

Answer 9

the temp at which a substance changes from liquid to gaseous state.

Question 10

Malleability:

Answer 10

described how easily a substance can be hammered or bent into different shapes.

Question 11

Hardness:

Answer 11

described the resistance of a solid to being scratched or dented

Question 12

Solubility

Answer 12

described the ability of a substance to dissolve in a solvent.

Question 13

Viscosity

Answer 13

described how quickly a substance flows in liquid form

Question 14

Density:

Answer 14

quantity of mass in a certain volume of material

Question 15

Examples of chemical properties:

Answer 15

reactivity with acids
reactivity with oxygen
combustibility
lack of reactivity

Question 16

Reactivity with acids:

Answer 16

some substances react vigorously with acids and others do not. ex. baking soda and vinegar produce gas

Question 17

reactivity with oxygen

Answer 17

substances in some foods react with oxygen when exposed to air. eg, avocados turning brown

Question 18

combustibility

Answer 18

ability of material to catch fire and burn in the air. ex. burning wood

Question 19

lack of reactivity

Answer 19

substances that do not react with other substances are inert. ex. helium in balloons

Question 20

What is physical change?

Answer 20

change of matter that does not change its chemical identity or composition. ex. cutting paper into pieces

Question 21

What is chemical change?

Answer 21

changes of matter that produce one or more products. ex. toasting bread

Question 22

What are the steps on how we know a new chemical has formed?

Answer 22

1. a new substance or material appears
2. emission, sound or light are given off
3. bubbles of gas are formed
4. a solid material appears when two liquids are mixed (a precitipate)

Question 23

Qualitative data;

Answer 23

can be observed and compared using words. ex. 5 senses.

Question 24

QuantitATIVE data:

Answer 24

can be measured and recorded using numbers

Question 25

Matter can be classified as:

Answer 25

Mixture which can be seperated into part by phyical changes

Question 26

Pure substances

Answer 26

elements: cannot be sepreated or broken down by physical or chemical changes
compunds: can be boken down into 2 or more elements by chemcial changes but not by physical