Free Printable Chemistry Pretest

1.

Which of the following changes demonstrates a chemical property?

a)

substance breaks in half

b)

substance combusts

c)

hammer bounces off substance

d)

substance floats in water

2.

Which of the following is a solution?

a)

salt water

b)

macaroni and cheese

c)

cake mix

d)

vegetable soup

3.

The abilities to dissolve in water and to conduct electricity are examples of

a)

natural properties

b)

chemical properties

c)

natural laws of matter

d)

physical properties

4.

Which is the correct equation for calculating density?

a)

Density= Mass/Volume

b)

Density = Mass/Weight

c)

Density = Volume/Mass

d)

Density = Volume/Weight

5.

Weight is a flawed measure of mass because it

a)

is not used in other countries

b)

is affected by the force of gravity

c)

tends to fluctuate

d)

can be influenced by temperature and pressure

6.

Which of the following describes a physical change?

a)

A marshmallow burns over an open flame.

b)

Icicles melt from a rooftop

c)

A cat eats a piece of fish

d)

Milk turns sour

7.

Which of the following describes a chemical change?

a)

clear liquids mix, producing a cloudy liquid with yellow chunks

b)

sliver coins are melted down and shaped into a solid brick

c)

salt is added to a pot of hot water, and the water's boiling point changes

d)

an apple is chopped into eight slices

8.

The law of conservation of mass states that

a)

matter is neither created or destroyed

b)

the mass of an object remains the same even if chemical change occurs

c)

the number of molecules before and after a chemical reaction cannot change

d)

mass is lost when a chemical change occurs

9.

Temperature is

a)

the movement of thermal energy from a solid to a liquid

b)

the difference in thermal energy between two objects

c)

a measure of how hot or cold something is

d)

a measure of how fast thermal energy is moving

10.

A substance that has neither a definite shape nor a definite volume is a

a)

fluid

b)

solid

c)

liquid

d)

gas

11.

In a solid, particles do not move around each other, but they do

a)

change shape

b)

vibrate

c)

flow

d)

sit completely still

12.

Sugar is considered a crystalline solid because its particles are

a)

arranged in a regular pattern

b)

arranged randomly

c)

completely motionless

d)

able to move around one another

13.

Vaporization that takes place both above and below the surface is called

a)

evaporation

b)

boiling

c)

condensation

d)

precipitation

14.

When a liquid freezes into a solid, the particles of the substance

a)

lose energy

b)

gain energy

c)

move faster

d)

disappear

15.

When the temperature of a gas decreases, and volume is held constant, the pressure of the gas

a)

stays the same

b)

increases

c)

becomes zero

d)

decreases

16.

Adding thermal energy to a gas at constant pressure will cause

a)

the volume of the gas to decrease

b)

the volume of the gas to increase

c)

the temperature of the gas to decrease

d)

the pressure of the gas to decrease

17.

Which atomic particle has no charge?

a)

electron

b)

neutron

c)

nucleus

d)

proton

18.

Which of the following pairs of atoms are isotopes?

a)

scandium-46, titanium-46

b)

iron-56, sodium 24

c)

chlorine- 35, chlorine-37

d)

sodium-24, magnesium-24

19.

Which statement is a part of Dalton's atomic theory?

a)

Atoms are composed of protons, neutrons, and electrons.

b)

Elements can have atoms that are isotopes.

c)

One type of atom cannot be changed to another type by a chemical reaction.

d)

Electrons move around the nucleus in an electron cloud.

20.

How are atoms arranged in the modern periodic table?

a)

by increasing atomic mass

b)

by decreasing atomic mass

c)

by increasing atomic number

d)

by decreasing atomic number

21.

Who organized elements into the modern periodic table?

a)

Dalton

b)

Mendeleev

c)

Rutherford

d)

Thomson

22.

How many valence electrons are present in an atom of argon?

a)

0

b)

8

c)

18

d)

40

23.

Use the periodic table to choose the pair of elements whose properties are most similar.

a)

silicon (Si), phosphorus (P)

b)

neon (Ne), sulfur (S)

c)

potassium (K), magnesium (Mg)

d)

chlorine (Cl), iodine (I)

24.

When do atoms form a covalent bond?

a)

when they share electrons

b)

when they give up electrons

c)

when they accept additional electrons

d)

when electrons remain with the same atoms

25.

Most atoms gain, lose, or share electrons to end up with how many valence electrons?

a)

0

b)

8

c)

12

d)

16

26.

Which of the following descriptions is a property of a base?

a)

feels slippery

b)

tastes sour

c)

reacts with metals

d)

reacts with carbonates

27.

Which of the following is most likely to be damaged by an acid?

a)

a glass jar

b)

a plastic bottle

c)

a gold bracelet

d)

an aluminum can

28.

In a heterogeneous mixture, the substances

a)

can be physically separated

b)

are chemically combined

c)

can only be separated through chemical processes

d)

break down into new substances

29.

Which of the following statements is true?

a)

A solution is a pure substance.

b)

A solution is a mixture.

c)

The solvent is dissolved in the solute.

d)

A solution has the same properties as a colloid.

30.

Which of the following is an example of a chemical change?

a)

breaking a rock into smaller pieces

b)

burning a candle

c)

stirring butter and sugar together

d)

adding food coloring to water

31.

In general, what happens to the rate of reaction when you decrease the temperature of a chemical reaction?

a)

it decreases

b)

it increases

c)

it is unaffected

d)

it increases, and then decreases

32.

Burning a log is an example of

a)

an endothermic reaction

b)

a solution

c)

a catalyst

d)

an exothermic reaction

33.

In the chemical equation shown, what are the reactants?

4\ Al\ +\ 3\ O_2\longrightarrow\ 2\ Al_2O_3

a)

$Al_2O_3$

b)

$Al_2O_3\ and\ Al$

c)

$Al\ and\ O_2$

d)

$Al_2O_3\ and\ O_2$

34.

Which of the following statements about synthetic materials is true?

a)

Synthetic materials are never harmful to the environment.

b)

Synthetic materials are pure substances found in nature.

c)

Synthetic materials have properties that are different from those of the natural materials used to produce them.

d)

Synthetic materials are not different from natural materials.

35.

Which of the following is a valid explanation for why people produce synthetic materials?

a)

Synthetic materials always biodegrade easily.

b)

Synthetic materials do not require any natural resources to produce.

c)

Synthetic materials are less artificial than natural resources.

d)

Synthetic materials help meet societal demand for materials that are in short supply in nature.

36.

A solid that forms from liquids in a chemical reaction is called a

a)

precipitate

b)

reactant

c)

product

d)

chemical change

37.

How can you balance a chemical equation?

a)

Change the products

b)

Change the coefficients

c)

Change the reactants

d)

Change the subscripts

38.

When the equation Al + Br₂ --> AlBr₃ is balanced, the coefficient for Al is

a)

1

b)

3

c)

2

d)

4

39.

The reaction in which hydrogen and oxygen are produced by running an electric current through water is an example of

a)

single replacement

b)

decomposition

c)

synthesis

d)

double replacement

40.

Which of the following factors does NOT affect the rate of a chemical reaction?

a)

surface area

b)

temperature

c)

concentration

d)

pressure

41.

An independent variable is

a)

the variable that stays constant

b)

the variable that is recorded

c)

the variable the scientist changes

d)

the variable that is always changing

42.

The dependent variable is

a)

the variable that stays the same

b)

the variable that is recorded

c)

the variable the scientist changes

d)

the variable that is always changing

43.

This step of the scientific method is an educated guess or a prediction.

a)

Hypothesis

b)

Research

c)

Observation

d)

Conclusion

44.

Which one is an example of Qualitative Data?

a)

25 Pounds

b)

30 Seconds

c)

2 Meters

d)

Soft

45.

Which is an example of Quantitative Data?

a)

42 grams

b)

Hard

c)

Squishy

d)

Blue

46.

This is the group that we will compare our experimental group to. This group stays "normal."

a)

Control Group

b)

Experimental Group

c)

Normal Group

d)

Weird Group

47.

Susan said, “If I fertilize my geranium plants, they will blossom.”

a)

recognize a problem

b)

test the hypothesis with an experiment

c)

form a hypothesis

d)

draw conclusions

48.

Johathan’s data showed that household cockroaches moved away from raw cucumber slices.

a)

recognize a problem

b)

test the hypothesis with an experiment

c)

form a hypothesis

d)

draw conclusions

49.

Rene grew bacteria from the mouth on special plates in the laboratory. She placed drops of different mouthwashes on bacteria on each plate.

a)

recognize a problem

b)

test the hypothesis with an experiment

c)

form a hypothesis

d)

draw conclusions

50.

Dana want to know how different are synthetic fibers from natural fibers.

a)

recognize a problem

b)

test the hypothesis with an experiment

c)

form a hypothesis

d)

draw conclusions

51.

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

52.

A student wants to test the effects of type of exercise on heart rate. What is the dependent variable?

a)

heart rate

b)

type of exercise

c)

amount of exercise

d)

time of day exercise occurs

53.

Observations made during an experiment are called:

a)

data

b)

problems

c)

conclusions

d)

questions

54.

On what axis should the independent variable always be?

a)

X

b)

Y

55.

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, what are the controlled variables?

a)

Type of plant, amount of music, and sunlight

b)

Water, apple juice, milk

c)

Plant growth

56.

Squidward found new reeds to tryout for his clarinet. He used an APPLAUSOMETER to measure applause after playing Under the Sea with each reed. The results were put in the table.
What was the independent variable?

a)

The Song

b)

The Reed

c)

The Applause

57.

The data collected supports which of the following questions that Squidward could have tested?

a)

Which song does the audience prefer?

b)

Which instrument does the audience like best?

c)

Which reed length creates the best sound?

d)

How do applause affect performance?

Chemistry Pretest

Total questions: 57

Worksheet time: 43mins

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