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8th Grade Physical Science MCAS Review Flashcards | StudBud
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8th Grade Physical Science MCAS Review
8th Grade Physical Science MCAS Review
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review for upcoming standardized test #physicalscience #matter #force #motion
Flashcards
43 cards
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Questions
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Answers
1
In the picture below, what part of a wave is represented by B?
amplitude
trough
wavelength
crest
2
How is temperature related to heat?
Temperature is a measure of heat
Temperature and heat are the same thing
Raising the temperature causes the heat to increase
Heat causes a change in the temperature of an object
3
What must two objects have for gravity to exist between them?
volume
roundness
mass
solidness
4
A car drives straight for 45 miles during 1 hour. What else do you need to figure velocity?
the total distance the car traveled
The direction the car traveled
how many times the car stopped
how long the car stopped for
5
What is a unit of force in the metric system?
newton
joule
pound
kilogram
6
Why do you weigh less on the moon than on Earth?
the moon has less mass than Earth
the moon is more dense than Earth
the moon is closer to the sun
the moon has a smaller radius
7
What property of a metal coin would be different on Mars than on the Earth?
weight
volume
density
mass
8
Which of these statements describes a physical change?
A banana starts to smell as it ripens.
Onions taste sweeter after they are cooked.
Aluminum cans getting crushed before recycling.
Copper turning green when exposed to air.
9
How does fiberglass insulation keep your home warm in the winter?
The air trapped in the fiberglass is an insulator
The fiberglass absorbs energy
The fiberglass is an insulator
The fiberglass generates heat
10
Which property of matter does not change regardless of how big a sample you have?
reactivity with oxygen
flammability
density
volume
11
In which state of matter are the particles able to move around one another?
gases only
gases and liquids only
solids, liquids and gases.
liquids only
12
What do microwaves transfer between a cell phone and a cell phone tower?
energy
electricity
air particles
sound
13
Which material is translucent?
frosted glass
construction paper
clear plastic
pure air
14
As an ice cube melts into a liquid, what property of the water remains unchanged?
temperature
mass
volume
density
15
A solid rock is sitting on the ground. What best describes the particles inside the rock?
constantly sliding over each other
not moving at all
always moving from place to place
vibrating, but not changing place
16
When paper is burned, the mass of the ash is less than the original paper. Why?
Some of the matter is destroyed during burning.
the ash has less volume than the paper.
The mass of the ash cannot be accurately measured.
Some of the products were given off as a gas.
17
Which unit is used to measure distance?
seconds
centimeters
milliliters
grams
18
A lamp has an electrical input of 120 watts. If 80 becomes light, how much is turned to heat?
more than 40 watts
exactly 80 watts
exactly 40 watts
less than 40 watts
19
Erin warms hot chocolate in the microwave. What happens as the temperature increases?
The particles are arranged in a pattern
The particles move slower
The particles have less energy
The particles move farther apart
20
What are you measuring when you take the temperature of something?
potential energy
average kinetic energy
kinetic energy
average potential energy
21
Which state of matter takes up both the volume and shape of the container that holds it?
solid
ice
gas
liquid
22
The picture below shows measurements made as a wave passed. What is the frequency of the wave?
2 Hz
5 seconds
0.5 Hz
2 seconds
23
The data below is for a moving car. What is the average speed of the car?
120 m/s
20 m/s
60 m/s
40 m/s
24
What is a wave?
a disturbance that transfers energy
a disturbance that transfers matter
any type of energy that makes particles move
any type of matter that vibrates back and forth
25
A car battery stores 12V of energy. If 9V is converted to electricity, what is the efficiency?
0.75%
75%
0.25%
25%
26
What process is an example of a physical change?
sodium metal reacting with water
a sandwich being broken down by your stomach
carrots being cut up for a salad
baking soda and vinegar bubbling
27
Which form of electromagnetic energy has the shortest wavelength?
gamma rays
ultraviolet waves
infrared waves
radio waves
28
The sidewalk is heated on a hot day. How do the sidewalk particles change?
Their kinetic energy decreases
They move freely from place to place
They move faster
They move closer together
29
What is the evidence that an unbalanced force is acting on an object?
The object remains at rest.
The mass of the object changes.
The motion of the object is changing.
The object has constant velocity.
30
Which of these is a chemical property of a sheet of paper?
the paper can be burned
the paper does not conduct electricity
the paper does not attract magnets
the paper can be crumpled
31
As you watch ice cream melting on a hot day, what are you observing?
the formation of a new substance
a physical change
a chemical change
a chemical reaction
32
Which of these particles is the smallest?
an atom
a nucleus
a proton
an electron
33
What type of energy is stored in batteries?
chemical
thermal
kinetic
elastic
34
Which of these substances is a compound?
uranium
nitrogen
chlorine
ammonia
35
Why does a red shirt appear red to your eyes?
it reflects every color except red
it reflects all colors in white light
it absorbs all colors in white light
it absorbs every color except red
36
Which represents the greatest acceleration?
0.020km/s2
0.002km/s2
200 m/s
200cm/s2
37
Which of these statements correctly describes the law of conservation of energy?
Energy cannot be created nor destroyed, but can change forms
Objects can only have potential or kinetic energy, not both
The amount of Kinetic Energy is a constant value
The energy destroyed when objects stop is equal to the mass
38
What is true of an object that is in free fall?
no forces act on the object
the forces of thrust and gravity are balanced
the forces of air resistance and gravity are balanced
only gravity acts on the object
39
Through which of these media do sound waves travel most slowly?
cold air
water
wood
iron
40
The image below shows a wave. What type of wave is it?
medium
electromagnetic
transverse
longitudinal
41
Which type of electromagnetic wave has the highest energy?
radio waves
microwaves
visible light waves
infrared waves
42
What is heat?
Change in the temperature in degrees Celsius
Total thermal energy of a substance
Energy transferred between two objects
Average kinetic energy of the particles in a substance
43
Calcium is an element. What is the smallest particle you can have of calcium?
an atom of calcium
a proton from calcium
a molecule that contains calcium
an electron from calclum
