Module #3

Question 1

What is a Physical PROPERTY?

Answer 1

Something that can be OBSERVED (see, feel, taste, smell, hear) or MEASURED (mass, volume, density)

Question 2

What is a Chemical PROPERTY?

Answer 2

Something that you can not observe until a CHEMICAL REACTION takes place. (flammability, toxicity, reactivity, acidity)

Question 3

What is a Physical CHANGE?

Answer 3

A change in matter that DOES NOT AFFECT its CHEMICAL COMPOSTITION.
The atoms are arranged the exact same way as they were before.

Question 4

What is a Chemical CHANGE?

Answer 4

A process that CHANGES SUBSTANCES INTO NEW SUBSTANCES.

The atoms are rearranged and look different from the way they were before.

Question 5

PHYSICAL OR CHEMICAL?

Gas was Created

Answer 5

Chemical

Question 6

PHYSICAL OR CHEMICAL?

Odor (smell) was produced

Answer 6

Chemical

Question 7

PHYSICAL OR CHEMICAL?

New matter formed

Answer 7

Chemical

Question 8

PHYSICAL OR CHEMICAL?

Sliced in half

Answer 8

Physical

Question 9

PHYSICAL OR CHEMICAL?

Color Changed

Answer 9

Chemical and Physical

Question 10

PHYSICAL OR CHEMICAL?

Got Smaller

Answer 10

Physical

Question 11

PHYSICAL OR CHEMICAL?

Looks exactly the same

Answer 11

PHYSCIAL

Question 12

PHYSICAL OR CHEMICAL?

Got Cold

Answer 12

Chemical

Question 13

PHYSICAL OR CHEMICAL?

Melted to a liquid

Answer 13

Physical

Question 14

PHYSICAL OR CHEMICAL?

Dissolving salt in water

Answer 14

Physical

Question 15

PHYSICAL OR CHEMICAL?

Cutting wood to make a playhouse

Answer 15

Physical

Question 16

PHYSICAL OR CHEMICAL?

Melting sugar crystals

Answer 16

Physcial

Question 17

PHYSICAL OR CHEMICAL?

Melting sugar crystals

Answer 17

Physical

Question 18

PHYSICAL OR CHEMICAL?

Bubbles form when vinegar is added to baking soda

Answer 18

Chemical

Question 19

PHYSICAL or CHEMICAL?

Buring a piece of wood to form ash

Answer 19

Chemical

Question 20

PHYSICAL OR CHEMICAL?

Rust forming on a bicylce

Answer 20

Chemical

Question 21

PHYSICAL OR CHEMICAL?

Crushing an empty soda can

Answer 21

Physical

Question 22

What happens to atoms during a CHEMICAL REACTION?

Answer 22

The atoms are REARRANGED

Question 23

What happens to atoms during a PHYSICAL REACTION?

Answer 23

The atoms STAY THE SAME

Question 24

The REACTANT in a chemical equation is always on the?

Answer 24

LEFT

Question 25

The PRODUCTS in a chemical equation is always on the?

Answer 25

RIGHT

Question 26

What is the LAW OF CONSERVATION OF MATTER?

Answer 26

MATTER CAN NOT BE CREATED OR DESTROYED

Question 27

PHYSICAL OR CHEMICAL? Eating a burger and having the acids in your stomach digest it to create energy

Answer 27

CHEMICAL

Question 28

What is your evidence? Eating a burger and having the acids in your stomach digest it to create energy is a CHEMICAL change because . . .

Answer 28

Evidence: It is a chemical change because the burger was digested and CHANGED into energy.

Question 29

What is your reasoning? Eating a burger and having the acids in your stomach digest it to create energy is a CHEMICAL change because the burger was digested and CHANGED into energy . . .

Answer 29

Reasoning : When a new substance is made, then it is evidence that a CHEMICAL change has occurred. The ATOMS were REARRANGED to MAKE SOMETHING NEW.

Question 30

PHYSICAL OR CHEMICAL? Taking a piece of paper and cutting it up to make paper snowflakes.

Answer 30

PHYSCIAL

Question 31

What is your evidence? Taking a piece of paper and cutting it up to make paper snowflakes is a PHYSICAL change.

Answer 31

Evidence: We start with paper and change the size and shape of the paper but we still have paper in the end.

Question 32

What is your reasoning? Taking a piece of paper and cutting it up to make paper snowflakes is a PHYSICAL change. We START with paper and change the size and shape of the paper BUT STILL HAVE PAPER IN THE END.

Answer 32

Reasoning: Because there is no new substance produced, we have a physical change. The ATOMS of the paper still LOOK THE SAME as they did when we started.