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