Show:
Vocabulary
Physical/ Chemical Changes
Signs of Chemical Change
Density
Properties
100
Anything that has mass (weight) and takes up space.
What is MATTER?
100
Is a melted popsicle an example of a physical change?
What is YES? You can melt and refreeze a popsicle and it will still be a popsicle.
100

What 2 signs of a chemcial change did we observe in the baking soda vinegar lab?

Change in temperature and formation of a gas (bubbles)

100

D = M/ V


M= 15g

v= 3 mL

D = 5 g/ml

100

The ability of a metal to be pulled into wires

ductility

200
These are the characterstics of an object and you use your senses to identify them.
What are PHYSICAL PROPERTIES?
200
Is Alka-Seltzer and water an example of a physical change?
What is NO? When you mix Alka-Seltzer and water, bubbles form, which indicates a chemical change as taken place.
200

What kind of change was takes place when you use an instant ice pack? Give evidence

Physical change- the beads are simply being dissolved in water

200

D = M/ V

M= 3 g

V= 7 mL

Is density greater than 1, less than 1 or equal to 1?

D= Less than 1

200

The ability to for a substance to dissolve?

solubility

300
Type of change where a new substance is created.
What is a CHEMICAL CHANGE?
300

Burning wood is what kind of change? state your evidence

Chemical-  new substance is formed (ash)

gass formed (smoke)

energy change (Heat & Light)

300

True or false: Dissolving alka seltzer tabs in water until is fizzes away completly is a physical change? Give evidence

false: Dissolving is a physical change but because the alka seltzer tab fizzes (creates a gas) it is a chemical change

300

D = M/ V

M= 7 g

V= 3 mL

Is density greater than 1, less than 1 or equal to 1?

D= Greater than 1

300

this chemcial property describes the ability of an object to react to oxygen to form rust

oxidation

400
A type of change where the substance stays the same, but size and shape may change.
What is a PHYSICAL CHANGE?
400
Explain how water could be an example of a physical change.
What is freezing and melting water to and from ice is an example of a physical change?
400

True or False. Melting butter is a chemical change

What is FALSE? It is a change in state,  nothing new is being created.

400

Which Object would float in water?

Object A: D= 1 g/mL

Object B: D= 1.8 g/mL

Object C:  D= 0.8 g/mL

Object C

400

the property of metal that enables it to be hammered in to sheets?

malleability 

500
This type of matter keeps a definite shape.
What is a SOLID?
500
CHALLENGE (not a quiz question): Explain how the water cycle an example of a physical change.
What is YES, it is a physical change, because water changes from a liquid/solid when it precipitates, to a gas when it evaporates, then forms back into a liquid when it condensates. Then the process repeats again with the same substance, WATER!
500

Name the 5 signs of a chemical change

formation of a gas

change in odor

change in energy (heat/ light)

formation of a precipitate

new substance is formed

500

D= m/ V

What is the mass? (include your units)

D = 2g/ml

V= 8 mL


16 g

500

What are the 3 chemical properties?

Oxidation, flammability, reactivity