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Review for Mid Term Exam December 2025

Total questions: 50

Worksheet time: 25mins

Name
Class
Date
1.

Which of the following tools is necessary in a science lab for safety purposes?

a)
A triple-beam balance
b)
A metric ruler
c)
A computer
d)
A fire extinguisher
2.

A fire blanket is used for:

a)
Smothering flames when someone’s clothing or hair catches fire
b)
Absorbing chemical spills
c)
Extinguishing large fires
d)
Protecting clothing and skin from chemical burns
3.

Long hair in the lab must be......

a)
Cut shorter
b)
Held away from the experiment with your free hand.
c)
Tied back to be kept out of the way.
d)
Wet
4.

All of the following statements concerning WHEN and HOW to use an eyewash are true EXCEPT:

a)
Flush the eyes with water for a minimum of 15 minutes.
b)
Keep the eyes closed while flushing with water.
c)
Know the location and how to use the eyewash before handling chemicals.
d)
After flushing with water, the school nurse should examine the eyes to determine if further treatment is needed.
5.

This is called a...

a)
Digital scale
b)
Triple beam balance
c)
Microscope
d)
Spring scale
6.

If a harmful chemical splashes in your eys or on your skin, you should _____.

a)
Ignore it and hope it goes away.
b)
Run to the bathroom.
c)
Wipe it off with a paper towel and finish the lab.
d)
Flush with water at the eyewash station and tell the teacher.
7.

An instrument that uses a lens to make tiny things look larger

a)
ruler
b)
scale
c)
microscope
8.

Which of the following is the proper way to attempt to determine the identity of an unknown substance?

a)
Put the substance close to your nose and sniff it.
b)
Taste a very small amount of it.
c)
Put a small amount on your skin and see if it burns.
d)
Waft it toward your nose.
9.

a)
A
b)
B
c)
C
d)
D
10.

a)
A
b)
B
c)
C
d)
D
11.

On which side of the periodic table are nonmetals located?

a)
right side
b)
left side
c)
stair case or zig zag line
d)
not here
12.

On which side of the periodic table are metalloids located?

a)
right side
b)
left side
c)
stair case or zig zag line
d)
not here
13.

a)
A
b)
B
c)
C
d)
D
14.

a)
A
b)
B
c)
C
d)
D
15.

When you mix a teaspoon of salt in a glass of water, a mixture forms. What type of mixture is formed, and what evidence supports the formation of this type of mixture?

a)
Heterogeneous mixture; the salt is no longer visible.
b)
Heterogeneous mixture; there are two different components.
c)
Homogeneous mixture; the salt changes to a visible color.
d)
Homogeneous mixture; it has the same composition throughout.
16.

a)
A
b)
B
c)
C
d)
D
17.

a)
A
b)
B
c)
C
d)
D
18.

a)
A
b)
B
c)
C
d)
D
19.

When a roller coaster reaches the top of a hill, its energy is mainly in the form of

a)
gravitational potential energy
b)
elastic potential energy
c)
chemical potential energy
d)
kinetic energy
20.

a)
A
b)
B
c)
C
d)
D
21.

a)
A
b)
B
c)
C
d)
D
22.

a)
A
b)
B
c)
C
d)
D
23.

a)
A
b)
B
c)
C
d)
D
24.

a)
A
b)
B
c)
C
d)
D
25.

Which substance will float on water?

a)
Glycerin and turpine
b)
Chloroform and glycerin
c)
Ammonia and turpine
d)
Seawater and acetic acid
26.

Which of the following correctly describes the structure of a solid?

a)
Particles are tightly packed and vibrate in place.
b)
Particles move freely and are widely spaced apart.
c)
Particles slide past one another but remain close together.
d)
Particles move rapidly in all directions.
27.

a)
A
b)
B
c)
C
d)
D
28.

a)
A
b)
B
c)
C
d)
D
29.

In photosynthesis, ________energy is transformed into ___________energy in the plant.

a)
chemical; light
b)
light; chemical
c)
heat mechanical
d)
mechanical, heat
30.

a)
A
b)
B
c)
C
d)
D
31.

a)
A
b)
B
c)
C
d)
D
32.

a)
A
b)
B
c)
C
d)
D
33.

a)
A
b)
B
c)
C
d)
D
34.

a)
A
b)
B
c)
C
d)
D
35.

A person is pushing a heavy box across a floor. If the frictional force opposing the motion is 20 N to the left, and the person applies a force of 30 N to the right, what is the net force?

a)
10 N to the left
b)
50 N to the right
c)
50 N to the left
d)
10 N to the right
36.

a)
A
b)
B
c)
C
37.

To calculate net forces, you need to ______the total amount of force acting on an object.

a)
add or subtract
b)
add or divide
c)
subtract and multiply
d)
subtract and divide
38.

a)
A
b)
B
c)
C
d)
D
39.

a)
A
b)
B
c)
C
d)
D
40.

a)
A
b)
B
c)
C
41.

a)
A
b)
B
c)
C
d)
D
42.

a)
A
b)
B
c)
C
d)
D
43.

a)
A
b)
B
c)
C
d)
D
44.

A hydroelectic power plant is a facility that generates electricity by harnessing the energy of flowing or falling water. The illustration below shows one with the water flowing through the plant. In a hydroelectric power plant, the potential energy of stored water at a higher elevation is transformed into_______.

a)
Gravitational potential energy
b)
Elastic potential energy
c)
Electrical energy
d)
Heat energy
45.

a)
A
b)
B
c)
C
46.

a)
A
b)
B
c)
C
d)
D
47.

When you stretch a rubber band, you increase its

a)
Gravitational potential energy
b)
Chemical potential energy
c)
elastic potential energy
d)
Kinetic energy
48.

As the longitudinal wave moves forward, the particles move:

a)
Perpendicular to the wave's motion.
b)
Parallel to the wave's motion.
c)
Stand in place.
d)
move completely down the string.
49.

The lowest part of a transverse wave is known as

a)
compression
b)
rarefaction
c)
crest
d)
trough
50.

The region of a longitudinal wave where the particles are closest together is know as

a)
compression
b)
rarefaction
c)
crest
d)
trough

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