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Unit 1 Review 2025

Total questions: 53

Worksheet time: 38mins

Name
Class
Date
1.

Pure substances include:

a)

Elements

b)

Homogeneous Mixtures

c)

Compounds

d)

Heterogeneous Mixtures

2.

Oxygen

a)

Element

b)

Compound

3.

Water

a)

Element

b)

Compound

4.

Heterogeneous mixture

a)

A mixture with a composition that varies from point to point

b)

A mixture with a uniform composition and appears visually the same throughout

5.

Homogeneous mixture

a)

A mixture with a composition that varies from point to point

b)

A mixture with a uniform composition and appears visually the same throughout

6.

Air

a)

Homogeneous mixture

b)

Heterogeneous mixture

7.

Chicken noodle soup

a)

Homogeneous mixture

b)

Heterogeneous mixture

8.

Brass (an alloy)

a)

Heterogeneous

b)

Homogeneous

9.

Oil and vinegar salad dressing

a)

Heterogeneous

b)

Homogeneous

10.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-5
d)
1-20
11.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
12.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
13.

In a test of pH levels, a baking soda has a pH of 9 and bleach has a pH of 12. What is true about there relationship?

a)

Both of the solution are Bases

b)

Both of the solution are Acids

c)

The Baking soda is an acid and the Bleach is a base

d)

The baking soda is a base and the Bleach is an Acid.

14.
According to the pH range which substance is more acidic than lemon juice
a)
Hydrochloric acid
b)
cabbage
c)
milk
15.
Bleach is a strong base, what is the pH level of bleach?
a)
13
b)
14
c)
1
d)
2
16.

What does pH measure?

a)

the amount of hydrogen (H+) ions

b)

the amount of hydroxide (OH-) ions

c)

amount of water

d)

all of the above

17.

Describe COHESION.

a)

Water molecules attracted to other substances.

b)

Water molecules climbing upwards against the force of gravity.

c)

Water molecules dissolving many substances because of its polarity.

d)

Water molecules attracted to other water molecules.

18.

Surface tension is the property of water in which...

a)

water molecules at the surface tend to stick together.

b)

water spills easily.

c)

water tends to be see-through.

19.
Which characteristic of water will allow a paperclip to remain floating on water when the paperclip is gently placed on top of the water?
a)
adhesion
b)
surface tension
c)
solvent properties
d)
nonpolar
20.
Force of attraction between similar molecules is called 
a)
Cohesive force
b)
Adhesive force
c)
Magnetic force
d)
gravitational force
21.
What word describes when water is attracted to other substances?
a)
cohesion
b)
adhesion
c)
capillary action
d)
surface tension
22.
tendency of molecules of the same kind to stick to one another
a)
cohesion
b)
adhesion
c)
solution
d)
polar molecule
23.

Water's ability to stick to glass is

a)

adhesion

b)

cohesion

c)

surface tention

d)

capillary action

24.
What two elements make up water?
a)
Helium and oxygen
b)
Hydrogen and oxygen
c)
helium and carbon
d)
oxygen and carbon
25.
Element or Compound?
H2O
a)
Element
b)
Compound
26.
Element or Compound?
H2SO4
a)
Element
b)
Compound
27.
Element or Compound?
Au
a)
Element
b)
Compound
28.
Which of the following is not a compound?
a)
HCl
b)
Cl
c)
NaCl
d)
CO2
29.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
30.
What cannot be broken down into other substances?
a)
Compound
b)
Mixture
c)
Solids
d)
Element
31.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
32.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
33.
Carbon is considered an element while carbon dioxide is considered a compound. This is because carbon dioxide is –
a)
a gas at room temperature.
b)
made of two different elements.
c)
given off by green plants.
34.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
35.

What is a compound?

a)

A substance that is made up of one type of atom and cannot be reduced to a simpler substance

b)

A material that has two or more elements or compounds that are in close contact and are mixed in any proportion. They can be separated by physical means.

c)

A substance made of two ore more different atoms that are chemically bonded to one another. They can only be destroyed by chemical processes.

36.

What is an element?

a)

A substance that is made up of one type of atom and cannot be reduced to a simpler substance

b)

A material that has two or more elements or compounds that are in close contact and are mixed in any proportion. They can be separated by physical means.

c)

A substance made of two ore more different atoms that are chemically bonded to one another. They can only be destroyed by chemical processes.

37.
a)
Element
b)
Compound
38.

The diagram has shown the WATER molecules. What is A

a)

Hydrogen

b)

Oxygen

c)

Carbon dioxide

d)

Helium

39.

After washing your hands, water that's stuck to your hands is which property of water?

a)

Surface Tension

b)

Cohesion

c)

Adhesion

d)

Water

40.
What word describes when water is attracted to other substances?
a)
cohesion
b)
adhesion
c)
capillary action
d)
surface tension
41.
Water droplets take a spherical shape (as pictured) because of ____________
a)
adhesion
b)
cohesion
c)
capillary action
d)
solubility
42.
Why does water move from the roots to the leaves of plants through the plants' tiny tubes?
a)
specific heat 
b)

capillary action

c)

atoms

d)
density
43.

Water moves opposite of gravity

a)

capillary action

b)

infiltration

c)

porosity

d)

permeability

44.
Since some acids seemingly "eat away" certain substances, acids are ____.
a)
bitter
b)
sliipery
c)
corrosive
d)
weak
45.
Bleach and oven cleaner are:
a)
strong acids
b)
weak acids
c)
strong bases
d)
weak bases
46.

According to the pH scale, which item is more acidic than lemons?

a)

battery

b)

vinegar

c)

milk

d)

blood

47.

According to the pH scale, which item is a stronger base than soap?

a)

baking soda

b)

ammonia solution

c)

tomato

d)

bleach

48.
Air
a)
Heterogeneous
b)
Homogeneous
49.
Soil
a)
Heterogeneous
b)
Homogeneous
50.

A bottle of dishwashing detergent contains a clear, viscous liquid. The label has a long list of ingredients, including water, sodium lauryl sulfate, fragrance, and Blue dye #5.

What can you infer about the material in the bottle from this label and the appearance of the liquid?

a)

It is a pure substance.

b)

It is a compound.

c)

It is a heterogeneous mixture.

d)

It is a homogeneous mixture.

51.

Pure Substance or Mixture?

neon

a)

pure substance

b)

mixture

52.
NaCl
a)
Element
b)
Compound
c)

Homogeneous Mixture

d)
Heterogeneous Mixture
53.
Carbon
a)
Element
b)
Compound
c)
Homogeneous Mixture
d)
Heterogeneous Mixture

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