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Chemistry Essentials - Unit 1 PreQuiz

Total questions: 25

Worksheet time: 20mins

Name
Class
Date
1.

Two or more elements that combine chemically.

a)

Molecule

b)

Mixture

c)

Compound

2.

Water consists of...

a)

Oxygen and carbon

b)

Hydrogen and oxygen

c)

Hydrogen and carbon

3.

How many atoms make up one molecule of laughing gas?

a)

1

b)

2

c)

3

d)

4

4.

The part of the mixture that passes through the filter paper is called the

a)

residue

b)

filtrate

c)

suspension

5.
"Turbidity" is the measure of a body of water's ____________________________.
a)
cloudiness
b)
eutrophication
c)
temperature change
d)
flocculation
6.

Which of the following can pass through a paper filter?

a)

Chlorine

b)

Oil

c)

dirt

d)

Na+

7.

Recycling of water in nature is known as

a)

Hydrological Cycle

b)

Carbon Cycle

c)

Nitrogen Cycle

d)

None of these

8.

Which substance is not an element?

a)

Neon (Ne)

b)

Oxygen (O2)

c)

Carbon dioxide (CO2)

d)

Iron (Fe)

9.

Which substance is not a molecule?

a)

Neon (Ne)

b)

Oxygen (O2)

c)

Carbon Dioxide (CO2)

d)

Nitrogen (N2)

10.

This is the smallest unit of an element.

a)

atom

b)

molecule

c)

compound

d)

nucleus

11.

Select all the examples of elements.

a)

Oxygen- O

b)

Salt- NaCl

c)

Hydrogen- H

d)

Water- H2O

e)

Gold- Au

12.

What do we call this arrangement of chemical elements?

a)

The proton chart of atoms

b)

The periodic table of elements

c)

The periodic table of molecules

13.

Elements like Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorus and Sulfer are

a)

alive

b)

Not alive

14.

These kind of observations are made using instruments such as rulers, balances and thermometers

a)

Qualitative

b)

Quantitative

c)

Scientific

15.
What is the probability of spinning green?
a)
0
b)
1/4
c)
1/2
d)
3/4
16.

There were 17 boys and 12 girls on the yellow school bus.

a)

Quantitative

b)

Qualitative

c)

Both

d)

Neither

17.
What is the first step in the scientific method?
a)
Make an observation --> Question
b)
Design and conduct an experiment
c)
Make an hypothesis
d)
Share your results
18.
A testable prediction about a scientific investigation is a(n)
a)
Question
b)
Observation
c)
Hypothesis
d)
Experiment
19.
A series of steps used by scientists to solve a problem or answer a question. 
a)
scientific method
b)
recipe
c)
data collection
d)
metric system
20.
3 cm = ? mm
a)
30
b)
300
c)
3000
d)
0.3
21.
Which one is not in the metric system?
a)
Kilometer
b)
Yard
c)
Centimeter
d)
Meter
22.
Convert 8 kilometers to meters
a)
800 m
b)
80,000 m
c)
8,000 m
d)
.008 m
23.

The SI unit for mass is the ___________.

a)

meter

b)

kilogram

c)

liter

d)

second

e)

Newton

24.

When heat is released it is an

a)

exothermic reaction

b)

endothermic reaction

c)

both

d)

none

25.

The temperature decreases outside of this reaction

a)

exothermic

b)

endothermic

c)

both

d)

none

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