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Physical Science Unit 5 Review 22-23

Total questions: 42

Worksheet time: 30mins

Name
Class
Date
1.
An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, the independent variable is ...
a)
The type of plant
b)
The amount of sunlight
c)
The type of music
d)
The type of liquid
2.

If you were testing the time it took for objects of different sizes to reach the ground after being dropped from 30 feet in the air, which of these would be the DEPENDENT VARIABLE?

a)

The time it takes for each object to hit the ground.

b)

The size of each object.

c)

The type of object you use.

d)

The height you drop the object from

3.
The variables in an experiment that stay the same are the:
a)
IV
b)
DV
c)
Constants
4.
Why do we want to test one variable at a time?
a)
Because it is hard to setup a data table with more than one
b)
It keeps the experiment fair and you can see what caused the change
c)
It is what has always been done
d)
It makes the results better in an experiment
5.
What is the formula for density?
a)
density = mass x volume
b)
density = mass / volume
c)
density = mass + volume
d)
density = mass - volume
6.

Joe was working on a Density Gizmo and was asking to put the red oval on the scale.  What was Joe measuring?

a)

Weight

b)

Mass

c)

Volume

d)

Length

7.
A substance that contains only one type of atom is a(n)
a)
compound
b)
element
c)
heterogeneous mixture
d)
homogeneous mixture
8.
Which of these is a pure substance?
a)
bread
b)
table salt
c)
garden soil
d)
sea water
9.
A mixture that appears to be evenly mixed throughout:
a)
an atom
b)
a compound
c)
a homogeneous mixture
d)
a heterogeneous mixture
10.
Examples are milk and gasoline.
a)
elements
b)
mixtures
c)
compounds
11.
Is sugar (C12H22O11) an element or a compound?
a)
Element
b)
Compound
12.

Which substance is a compound?

a)

copper

b)

magnesium

c)

saltwater

d)

water

13.

A combination of substances that are not chemically combined is called a

a)

mixture

b)

compound

c)

element

14.

Earth’s air is made up of molecules of different gases that are not joined chemically. Which term best describes air?

a)

compound

b)

mixture

c)

pure substance

d)

element

15.

Which is the best example of a mixture?

a)

a brick of pure gold

b)

the distilled water in a bottle

c)

the salt water in the ocean

d)

the helium in a balloon

16.
This diagram represents a _____.
a)
pure substance that is a compound
b)
mixture of elements
c)
pure substance that is an element
d)
mixture of compounds
17.
a)
Element
b)
Compound
c)
Mixture of compound and element
d)
Mixture of elements
18.
a)
Element
b)
Compound
c)
Mixture of compound and element
d)
Mixture of elements
19.

Physical properties....

a)

change the matter when studied

b)

can be observed and measured without changing the matter being studied

c)

include the ability to burn and rust

d)

are useless unless studied in a lab

20.

______________________ can only be recognized when substances react or do not react chemically with one another.

a)

Physical properties

b)

Chemical properties

c)

Flammable properties

d)

Colorful properties

21.
Which of the following is not a chemical property? 
a)
rusting 
b)
boiling 
c)
rotting 
d)
burning 
22.
Which is an example of a physical property?
a)
ability to react with acid
b)
 state of matter
c)
flammability
d)
ability to react with oxygen
23.

All of the following are examples of physical properties EXCEPT

a)

Density

b)

Heat conductivity

c)

pH (acidic or basic)

d)

Boiling point

24.

Which of the following is a chemical property of water?

a)

Reacts with pure sodium

b)

Boils at 100 oC

c)

Is liquid at room temperature

d)

Has a density of 1 gm/mL

25.
Ice melting is an example of a
a)
physical change
b)
chemical change
c)
physical property
d)
chemical property
26.
Which is an example of a chemical change?
a)
melting ice to make water
b)
baking cake batter to make a cake
c)
putting cheese on bread to make a cheese sandwich
d)
cutting an orange into slices for a snack
27.
a copper penny turning greenish after a few years.
a)
Chemical Change
b)
Physical Change
28.
Burning a marshmallow over a campfire
a)
Physical
b)
Chemical
29.
Which of the following indicates a chemical change?
a)
Change in state of matter
b)
Temperature change
c)
Change in size 
d)
Change in shape
30.
Which Law states that Matter cannot be created or destroyed during a Chemical Change/Reaction?
a)
Conservation of Energy
b)
Conservation of Matter (Mass)
c)
Conservation of Momentum
d)
Conservation of Thermodynamics
31.
Which of the following is an example of a precipitate?
a)
liquid evaporating into gas
b)
a solid formed from a frozen liquid
c)
a chunk solid formed from two liquids combining
d)
a liquid solution that contains two substances
32.
Which of the following is an example of a physical change?
a)
sugar and oxygen reacting to produce water and carbon dioxide
b)
honey dissolving in tea
c)
a raw egg being cooked
d)
metal rusting after being left out in the rain
33.

O2(g) + 2 H2 (g) → 2 H2O (g) + EnergyO_2\left(g\right)\ +\ 2\ H_2\ \left(g\right)\ \rightarrow\ 2\ H_2O\ \left(g\right)\ +\ Energy  

a)

endothermic

b)

exothermic

34.

6 CO2+ 6 H2O + Energy → C6H12O6 + 6 O26\ CO_2+\ 6\ H_2O\ +\ Energy\ \rightarrow\ C_6H_{12}O_6\ +\ 6\ O_2

a)

endothermic reaction

b)

exothermic reaction

35.

_____ reactions usually feel hot!

a)

endothermic

b)

exothermic

36.

____ reactions usually feel cold.

a)

endothermic

b)

exothermic

37.
Pure water has a pH of 7. Pure water _______.
a)
is a base
b)
is a neutral substance
c)
could be either an acid or a base
d)
is an acid
38.
Many cleaning solutions are bases. Which of the following is a property of most bases?
a)
feels slippery
b)
white color
c)
can only be liquid
d)
tastes sour
39.
Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood?
a)
strongly acidic
b)
slightly acidic
c)
strongly basic
d)
slightly basic
40.
Which of the following statements is correct?
a)
Blue litmus paper turns red when placed in a base.
b)
Red litmus paper turns blue when placed in a base.
c)
Blue litmus paper stays blue when placed in an acid.
d)
Red litmus paper stays red when placed in a base.
41.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
42.
According to the pH range which substance is more acidic than lemon juice
a)
Hydrochloric acid
b)
cabbage
c)
milk

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