Vocabulary
Physical / Chemical Changes
Density
Matter
Properties
100
Anything that has mass (weight) and takes up space.
MATTER
100
Is a melted popsicle an example of a physical change?
YES. You can melt and refreeze a popsicle and it will still be a popsicle.
100
True or False. If you do not know the mass of an object than you CANNOT determine the denisity of that same object?
True.
100
A substance that changes from a solid directly to a gas has undergone the process of ________________________.
Sublimation.
100
You use these to help you identify the physical properties.
YOUR SENSES - sight, taste ,tocuh, smell, etc.
200
These are the characterstics of an object and you use your observations / senses to identify them.
PHYSICAL PROPERTIES
200
Is Alka-Seltzer and water an example of a physical change?
NO. When you mix Alka-Seltzer and water, bubbles form, which indicates a chemical change as taken place.
200
If an object's density is 2 g/ml, will it sink or float in water?
Sink, object's greater than 1 g/ml will sink in water.
200
Name the 3 types of matter.
SOLID, LIQUID, GAS
200
Name 2 physical properties of ice.
Cold, hard, solid, wet, etc.
300
Type of change where a new substance is created.
CHEMICAL CHANGE
300
Getting a haircut is an example of a ______________________ change?
PHYSICAL. Chemical composition of the substance (hair) has not changed.
300
An object’s mass is 10 g and it has a volume of 2 ml. What is the density? (Use correct units)
5 g/ml
300
These molecules can move freely and will take the shape of any container you put them in.
A LIQUID
300
Is density a physical or chemical property of matter?
Physical.
400
A type of change where the substance stays the same, but size and shape may change.
PHYSICAL CHANGE
400
Is rust an example of a chemical change?
What is YES? You cannot change rust back into the metal is was before; therefore, it is a chemical change.
400
An objects density is 4 g/ml. It has a mass of 16g. What is the volume (Use correct units)
4 ml
400
These molecules move extremely rapidly and freely whereever there is open space.
GAS
400
Name a chemical property of baking soda.
Reacts with acids.
500
This type of matter keeps a definite shape and volume.
SOLID
500
Name at least two indicators (evidence) of a chemical change.
Color change, bubbles, temperature change
500
A substance has a volume of 40 cm and a density of 1 g/cm . What is its mass? (Use correct units).
40 g
500
Identify 1 example of a solid, liquid, and gas.
Solid- desk, book; Liquid- water, lemonade; Gas- helium, air
500
A base and an acid chemically react to from a new substance. What is this substance called?
A salt.
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