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Physical Science
Test Description: MST2
Instructions: Answer all questions to get your test result.
1) Review the reactants in the chemical reaction shown. Na2O + H2O = How many atoms of oxygen must be present in the product of this reaction?
A
1
B
6
C
4
D
2
2) Which properties of metals best explain why they are often used in electrical wiring?
A
ductility and conductivity
B
malleability and conductivity
C
ductility and malleability
D
luster and malleability
3) Which statement describes the relationship between electric generators and electric motors?
A
Generators transform mechanical energy into electrical energy whereas electric motors transform electric energy into mechanic
B
Both electric generators and electric motors use motion in a magnetic field to produce electric current.
C
Generators transform electrical energy into mechanical energy whereas electric motors transform mechanical energy into electr
D
Both electric generators and electric motors transform current from a magnetic field into mechanical energy.
4) Which law is best described as a body at rest tends to remain at rest, and a body in motion tends to remain in motion, unless acted upon by an unbalanced force.
A
law of gravity
B
law of inertia
C
law of forces
D
law of friction
5) What will happen to an object in motion with no unbalanced force acting on it?
A
It will initially accelerate but gradually slow down until it comes to a rest.
B
It will continue to move at a constant speed.
C
It will continue to accelerate until it reaches the speed of light.
D
It will gradually slow down and come to a rest.
6) If the mass of a moving object could be halved, what would happen to the inertia of the object?
A
It would be quadrupled.
B
It would remain unchanged.
C
It would be halved.
D
It would be doubled.
7) A rocket's action is to push down on the ground with the force of its powerful engines, and the reaction is that the ground pushes the rocket upwards with an equal force. Which law best explains this event?
A
The Law of Universal Gravity
B
Newton's 1st Law of Motion
C
Newton's 2nd Law of Motion
D
Newton's 3rd Law of Motion
8) Which statement about the electromagnetic spectrum is true?
A
Information carried by most wavelengths of the spectrum are not visible to the human eye.
B
Visible light has the shortest wavelengths of all energy on the electromagnetic spectrum.
C
Energy with longer wavelengths are more damaging than energy with shorter wavelengths.
D
Exposure to any type of energy on the electromagnetic spectrum will cause cellular damage.
9) What is the effect of prolonged exposure to an excessive amount of ultraviolet radiation?
A
Birth defects would result from mutated DNA and be apparent in later generations.
B
Ultraviolet radiation would build up within the organism, destroying its internal organs.
C
Behavioral changes, such as lack of coordination, memory loss, and loss of motor skills, would occur.
D
Mutations in genetic material would occur and cause a cancerous overgrowth of skin cells.
10) Which statement explains why infrared waves are generally referred to as heat waves?
A
The most common type is thermal radiation.
B
Their frequencies are higher than those of visible light.
C
They are absorbed, not reflected, by the skin.
D
They are the primary waves emitted by the Sun.
11) What is the purpose of a generator?
A
to create electrical energy
B
to generate a mechanical force
C
to produce a magnetic field
D
to measure forces
12) Which energy transformation is found in an electric motor?
A
chemical energy → mechanical energy
B
electrical energy → chemical energy
C
electrical energy → mechanical energy
D
mechanical energy → electrical energy
13) If a car is traveling at an average speed of 70 kilometers per hour, how long does it take the car to travel 14 kilometers?
A
0.84 hour
B
0.51 hour
C
5.10 hours
D
0.20 hour
14) An object originally at rest is uniformly accelerated along a straight-line path to a speed of 12 m/s in 3.0 seconds. What is the acceleration of the object?
A
1.25 m/s/s
B
15 m/s/s
C
4.0 m/s/s
D
36 m/s/s
15) Which correctly describes infrared radiation?
A
They are waves with frequencies lower than red on the visible spectrum.
B
They are high-energy waves that can damage the eyes and skin.
C
They are light waves that can be detected by the human eye.
D
They are waves with frequencies higher than violet on the visible spectrum.
16) What is a benefit of ultraviolet radiation to humans?
A
vitamin D formation
B
sunburn
C
increased risk of cancer
D
electronic communication
17) Which list includes mechanical waves only?
A
infrared rays, ultraviolet rays, visible light
B
seismic waves, sound waves, water waves
C
seismic waves, microwaves, X-rays
D
radio waves, sound waves, waves in a rope
18) Which statement about the Law of the Conservation of Mass is true?
A
The mass of the products can be less than the mass of the reactants.
B
The mass of the reactants must be more than the mass of the products.
C
The mass of the products must be equal to the mass of the reactants.
D
The mass of the final products can be more than the mass of the reactants.
19) The mass of chemical A is 2 g, and the mass of chemical B is 5 g. If the two chemicals are mixed and a chemical reaction takes place, what is the mass of the end products?
A
2 g
B
3 g
C
7 g
D
10 g
20) How are the elements organized into the periodic table?
A
Elements are grouped by color.
B
Elements are ordered by atomic number.
C
Elements are arranged alphabetically.
D
Elements are ordered by atomic weight.
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