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1st Weeks Test -2025

Total questions: 71

Worksheet time: 2hrs 45mins

Name
Class
Date
1.

Which process is an example of of a physical change?

a)

ice melting

b)

milk souring

c)

metal rusting

d)

wood burning

2.

Which of the following can be signs that a chemical change has occurred?

a)

color change

b)

formation of a gas (bubbles)

c)

energy change

d)

All of the above

3.

A change in size, shape, or state of matter that does not change into a new kind of matter is a

a)

product

b)

chemical change

c)

physical change

d)

reactant

4.

What type of change takes place when you separate a mixture

a)

chemical change

b)

physical change

c)

mixture

d)

solution

5.

The best way to separate a mixture of salt and water is by

a)

chemical change

b)

evaporation

c)

burn it

d)

shape

6.

This is a __________ change.

a)

Physical

b)

Metaphysical

c)

Chemical

d)

Logical

7.

When chameleons want to hide from predators and blend into their surroundings, they are undergoing a ___________ change in the skin.

Also, they are adorable.

a)

Physical

b)

Chemical

8.

This is a _____________ change.

a)

Chemical

b)

Physical

9.

Percy is cutting the grass and picks up the clippings. He hates lawn work but loves the smell of cut grass. Percy has created a _________ change.

a)

Physical

b)

Chemical

10.

When two liquids are mixed and a solid is formed, the new solid is called a ________________.

a)

Levitate

b)

Precipitate

c)

Palpitate

d)

Bad date

11.

When lithium metal is dropped into a container of water, the lithium sparks and fizzes and the water begins to bubble violently. The conclusion that can be drawn from that is:

a)

A new substance is created because this is a chemical change.

b)

No new substances are created because there is a chemical change.

c)

No new substances are created because this is a physical change.

d)

A new substance is created because this is a physical change.

12.

Cutting a tree limb into logs is (a)____________ and burning them in the fireplace is (b)____________.

a)

(a) A Physical Change

(b) Also a Physical Change

b)

(a) A Physical Change

(b) A Chemical Change

c)

(a) A Chemical Change

(b) Also a Chemical Change

d)

(a) A Chemical Change

(b) A Physical Change

13.
Iron rusts.
a)
Chemical change
b)
Physical Change
14.
Milk Sours
a)
Chemical Change
b)
Physical Change
15.
A tire is inflated with air.
a)
Chemical Change
b)
Physical Change
16.
Is freezing juice a physical or chemical change?
a)
Physical Change
b)
Chemical Change
17.
Any change in the state of matter of a substance is a...
a)
Physical Change
b)
Chemical Change
18.

Which of the following are examples of a Chemical Change? (Select THREE-3)

a)

Iron Rusting

b)

Gas Burning

c)

Breaking a glass

d)

Boiling water

e)

Burning Wood

19.
Which is an example of a chemical change?
a)
baking a cake
b)
freezing water
c)
crushing a can
d)
breaking an egg
20.
Which example best describes a physical change?
a)
iron rusting
b)
charcoal burning
c)
an ice cube melting
d)
a marshmallow burning
21.
Which is the correct formula for:
 three hydrogen (H)
one sulfur (S)
four oxygen (O)
a)
H3SO4
b)
HSO4
c)
H4S3O
d)
H2O
22.
How many atoms are there TOTAL in:
H2SO4
a)
6
b)
5
c)
7
d)
3
23.
Na + MgF2 -->  NaF + Mg
What are the reactants?
a)
Na + MgF2
b)
Na
c)
NaF + Mg
d)
NaF
24.
NH3 ---> N2 + H2
What are the products?
a)
N2 + H2
b)
N2
c)
H2
d)
NH3
25.
All of the following are chemical changes except
a)
iron rusting
b)
water evaporating
c)
wood burning
d)
food rotting
26.
How many elements are present in this compound?
Mg2As3COHNi2
a)
2
b)
4
c)
6
d)
10
27.
What is Fe2O3
(rust) made up of?
a)
1 flourine, 2 einsteinium,
3 oxygen
b)
2 fluorine, 3 oxygen
c)
2 iron, 3 oxygen
d)
2 iron, 3 osmium
28.
What is H2SO4 
(Sulfuric Acid) made up of?
a)
2 hydrogen, 1 sulfur, 4 oxygen
b)
1 hydrogen, 2 sulfur, 4 oxygen
c)
2 hydrogen & 4 sodium
d)
1 hydrogen & 6 sodium
29.
What is HCl
(hydrochloric acid) made up of?
a)
1 hydrogen, 1 carbon,  1 Iodine
b)
1 hydrogen & 2 carbons
c)
1 hydrogen & 1 chlorine
d)
1 hydrogen & 2 chlorine
30.

How many different kinds of elements are there?

a)

4

b)

3

c)

2

d)

1

31.

How many carbon atoms are there?

a)

2

b)

3

c)

8

d)

16

32.

How many atoms of carbon are there?

a)

2

b)

4

c)

12

33.

How many total atoms are there?

a)

8

b)

5

c)

3

d)

1

34.
Total mass before a chemical reaction is the same as the mass after the chemical reaction is
a)
law of conservation of mass
b)
reactant
c)
product
d)
yield
35.
6CO2 contains
a)
6 carbon atoms, 2 oxygen atoms
b)
12 carbon atoms, 12 oxygen atoms
c)
6 carbon atoms, 12 oxygen atoms
d)
12 carbon atoms, 6 oxygen atoms
36.

In the equation what is the mass of the new substance FeS?

S + Fe = FeS

32g + 56g = ?

a)
88
b)
56
c)
32
d)
24
37.

Take inventory:

a)

H = 3

O = 3

b)

H = 6

O = 1

c)

H = 2

O = 1

d)

H = 6

O = 3

38.

Take inventory:

a)

H = 3

O = 3

b)

H = 6

O = 1

c)

H = 2

O = 1

d)

H = 6

O = 3

39.

How many grams of OXYGEN would be needed to show conservation of mass in the example below?

a)

100 g

b)

93 g

c)

7 g

d)

0 g

40.

How many grams of coal were present at the start of the chemical change?

a)

Unknown

b)

100 g

c)

200 g

d)

50 g

41.

How many grams of CHOCOLATE POWDER are shown in the example of conservation of mass below?

a)

450 g

b)

465 g

c)

0 g

d)

15 g

42.

How many grams of LIQUID WATER are shown in the example of conservation of mass?

a)

0 g

b)

50 g

c)

100 g

d)

200 g

43.

Mass is neither created nor ______________.

a)

made

b)

destroyed

c)

changed

44.

How many kilograms of SMOKE are shown in the example of conservation of mass?

a)

1 kg

b)

30 kg

c)

28 kg

d)

3 kg

45.

True or False: The mass of the reactants is equal to the mass of the products?

a)

True

b)

False

46.

C + O2  →  CO2C\ +\ O_2\ \ \rightarrow\ \ CO_2  

a)

Balanced

b)

Unbalanced

47.

6C  +  6H2O  →  C6H12O66C\ \ +\ \ 6H_2O\ \ \rightarrow\ \ C_6H_{12}O_6  

a)

Balanced

b)

Unbalanced

48.

Na  +  Cl2  →   NaClNa\ \ +\ \ Cl_2\ \ \rightarrow\ \ \ NaCl  

a)

Balanced

b)

Unbalanced

49.

CH4  +  O2   →   CO2  +  2H2OCH_4\ \ +\ \ O_2\ \ \ \rightarrow\ \ \ CO_{2\ \ }+\ \ 2H_2O  

a)

Balanced

b)

Unbalanced

50.

What type of thermal energy transfer is number 1 pointing to?

a)

Convection

b)

Conduction

c)

Radiation

d)

Insulation

51.

What type of thermal energy transfer is number 3 pointing to?

a)

Convection

b)

Conduction

c)

Radiation

d)

Insulation

52.

What is the definition of CONVECTION

a)

When heat transfers through waves.

b)

When heat transfers from objects that are touching.

c)

a hot liquid or air that expands, becomes less dense, and rises or becomes more dense, and sinks.

d)

Heat traveling from the sun

53.

A lava lamp contains colored liquids. These liquids form globs that break off and rise to the top of the liquid. The globs rise due to

a)

Conduction

b)

Convection

c)

Radiation

d)

Insulation

54.

Warm air over the beach rises while cooler dense air from the ocean rushes in this is due to..

a)

Conduction

b)

Convection

c)

Radiation

d)

Insulation

55.

Which of the following statements about convection is true?

a)

all types of currents are convection currents

b)

Convection occurs between solids only at high temperatures

c)

Convection can only occur during the process of boiling

d)

Convection always involves the circulation of liquids and gases

56.

A boy sits to the side of a campfire. He is 10 feet away but still feels warm. This is an example of ....

a)

Conduction

b)

Convection

c)

Radiation

d)

Insulation

57.
a)

Conduction

b)

Convection

c)

Radiation

58.
a)

Conduction

b)

Convection

c)

Radiation

59.
a)

Conduction

b)

Convection

c)

Radiation

60.
a)

Conduction

b)

Convection

c)

Radiation

61.
a)

Conduction

b)

Convection

c)

Radiation

62.
a)

Conduction

b)

Convection

c)

Radiation

63.
a)

Conduction

b)

Convection

c)

Radiation

64.

Kinetic energy is the energy of————-

a)

Temperature

b)

Ocean

c)

Lotion

d)

Motion

65.

Thermal energy is transferred from————-

a)

A cooler object to a hotter one

b)

A hotter object to a cooler one

66.

Molecules with more kinetic energy move ———- than molecules with less kinetic energy

a)

Lower

b)

Faster

c)

Higher

d)

Slower

67.

Energy transfers from ________ to ____________.

a)

hot , cold

b)

warm , cool

c)

liquid , gas

d)

solid , liquid

68.

What is the effect of cooling on the kinetic energy of particles?

a)

The kinetic energy increases.

b)

The kinetic energy remains the same.

c)

The kinetic energy decreases.

d)

The kinetic energy fluctuates.

69.

In which state of matter do particles have the most kinetic energy?

a)

Solid

b)

Liquid

c)

Gas

d)

Plasma

70.

The more kinetic energy a particle has, the __________ it will move.

a)

slower

b)

faster

c)

more erratically

d)

less smoothly

71.

What state of matter has particles that are tightly packed together?

a)

Liquid

b)

Gas

c)

Solid

d)

Plasma

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