week 1, concept 1 : Chemistry (matter and atoms)

Question 1

Question 2

Question 3

Chemistry is the study of _

Answer 3

matter

Question 4

Matter is _

Answer 4

anything that has mass and takes up space.
Matter can change from one form to another.

Question 5

In a chemical change (chemical reaction), substances are_

Answer 5

used up and others are formed in their place.

Question 6

In a physical change, matter _

Answer 6

does not lose its identity.

Question 7

A common physical change is _

Answer 7

a change of state.

Question 8

Fact is_

Answer 8

A statement based on direct experience

Question 9

Hypothesis is_

Answer 9

A statement that is proposed, without actual proof, to explain a set of facts or their relationship.

Question 10

Theory is_

Answer 10

The formulation of an apparent relationship among certain observed phenomena, which has been verified to some extent.

Question 11

Gas has _ and _

Answer 11

• no definite shape or volume.
• Expands to fill whatever container it is put into.

Question 12

Liquid has_

Answer 12

• no definite shape but a definite volume.

Question 13

Solid has_

Answer 13

• a definite shape and volume.

Question 14

An example of a chemical change (chemical reaction) is_

Answer 14

• propane gas burning in air

propane and oxygen are converted to

carbon dioxide and water

Question 15

An example of a physical change is_

Answer 15

• ice melting

ice is solid water, when it melts it is liquid water

Its still H2O, there has been no chemical reaction, simply change in state

Question 16

State the difference in the arrangement of particles in the three states of matter_

Question 17

gas is matter

T/F

Answer 17

T

Question 18

organic chemistry deals with_

Answer 18

carbon compounds

Question 19

biochemistry deals with _

Answer 19

• bio-chemical reactions
• that occur in biological systems (ie. the body)

Question 20

what method do scientist use to learn?

Answer 20

• “the scientific method” (c 1600)

at the heart of the scientific method is testing of theories

Question 21

prior to “the scientific method” (c1600) scientist_

Answer 21

• made statements that they believed to be true because they sounded right

Question 22

three central parts of the “Scientific method”

Answer 22

• fact
• hypothesis
• theory

Question 23

example of a fact_

Answer 23

iron is hard

• this is observable
• can establish based on our experience

Question 24

hypothesis is_

Answer 24

• something that is testable
• one is able to test in order to prove

Question 25

a theory is\_

Answer 25

* similar to hypothesis except that we have a **stronger belief in it** * because **more evidence supports it** (although if we find **new evidence** that conflicts with the theory it can be **alter or rejected)**

Question 26

what is **different** between the **three states of matter**?

Answer 26

the arrangement of particals

Question 27

solid particals are arranged\_ | (6)

Answer 27

* very **close** to each other * **fixed** in position * very **strong interaction** between the particles * **movement** of particles very **slow** * **definite** shape * **definite** volume

Question 28

the **arrangement** of particals in a **liquid** is\_

Answer 28

* still close but **not as close as solid** * particals **not fixed** but **random** * partical interaction is strong but **not as strong as solid** * take the **shape of the container** * **movement** particals **moderate** * definite volume * definte mass

Question 29

**arrangement** of particles in **gases**\_

Answer 29

* very **far apart** from each other * **interactions** of particals - **none** * **movement** of particlals- **very fast** * **take shape** of the container * **fill volume** of container

Question 30

Three states of matter\_

Answer 30

* gas * liquid * solid

Question 31

examples of gases\_

Answer 31

* water vapour * air

Question 32

examples of liquid\_

Answer 32

* water * oil * vinegar

Question 33

examples of solids\_

Answer 33

* ice * salt * iron