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Physical Science Review

Variables and What comes first

Question: Which is the independent
variable?

a) Heat in your apartment winter
b) Thermostat setting
Answer: Thermostat setting

Question: Which is the independent
variable?

a) Your exam grade
b) Days absent from class
Answer: Days absent from class

Question: Which is the independent
variable?

a) Body Height
b) Age of body
Answer: Age of body

Question: Which is the independent
variable?

a) Crazy behavior in school
b) # of incident referrals
Answer: Crazy behavior in school will increase your referrals

Question: Which is the independent
variable?

a) Length of pencil
b) Number of times pencil has been sharpened
Answer: Number of times pencil has been sharpened

Matter Mixture?

Question: Hydrogen(H)

a) Homogeneous
mixture
b) Heterogeneous
mixture
c) Compound
d) Element
Answer: Element

Question: Water (H2O) is a

a) Homogeneous
mixture
b) Heterogeneous
mixture
c) Compound
d) Element
Answer: Compound (more than one element listed)

Question: Hot chocoloate

a) Homogeneous
mixture
b) Heterogeneous
mixture
c) Compound
d) Element
Answer: Homogeneous Mixture. Looks the same throughout.

Question: Chili is a

a) Homogeneous
mixture
b) Heterogeneous
mixture
c) Compound
d) Element
Answer: Heterogeneous Mixture. Made of many different parts

Question: Salt (NaCl) is a

a) Homogeneous
mixture
b) Heterogeneous
mixture
c) Compound
d) Element
Answer: Compound

Particle Motion

Question: Particles are farthest apart
in which phase of
matter?
Answer: Gas

Question: In which phase of matter
to particles move the
fastest?
Answer: Gas

Question: Which state of matter can you feel but not pick up with your hand?
Answer: Water

Question: What happens to the movement of particles if they are cooled down.
Answer: They slow down

Question: Heat is added to an
object. What do that
objectís particles do?
Answer: SPEED UP. AHH it's hot!

Chemical Change?

Question: When we burn gas in our cars, we produce carbon dioxide, a gas. Is this evidence of a chemical change?
Answer: Yes, a gas is produced.

Question: Is digesting food an
example of chemical
change?
Answer: Yes. Gas is produced.

Question: I pour bleach and an unknown liquid into a glass cup. I pick up the cup and it feels hot.

Is that a sign of chemical change
Answer: Yes. Heat is produced.

Question: I smashed a bag of chips into smaller pieces. Is this a physical or chemical change?
Answer: Physical change. There is no evidence of a chemical change.

Question: Are the lights above us evidence of a chemical change?
Answer: Yes. Light is produced.

Oh the Random

Question: Identify the part of the
scientific method:

Scientist looks at the data
from the experiment reports on what was learned
Answer: Conclusion. This is the end of the experiment.

Question: Identify the part of the
scientific method:

Scientist states what they
believe will be the solution
to the problem.
Answer: Hypothesis. This is where the scientist tells what he/she thinks will happen.

Question: Identify the part of the
scientific method:

Scientist creates a plan to test what he/she thinks will happen.
Answer: Experiment.

Question: Identify the part of the
scientific method:

Scientist thinks of a problem she would like to test.
Answer: Problem

Question: State the four parts of the Scientific Method
Answer: Problem/Question
Hypothesis
Experiment
Conclusion