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Howle - 8th Grade Flashcards | StudBud
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Howle - 8th Grade
Howle - 8th Grade
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review for upcoming standardized test #physicalscience #matter #force #motion
Flashcards
43 cards
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Answers
1
What are you measuring when you take the temperature of something?
kinetic energy
average kinetic energy
average potential energy
potential energy
2
What is heat?
Total thermal energy of a substance
Average kinetic energy of the particles in a substance
Change in the temperature in degrees Celsius
Energy transferred between two objects
3
How is temperature related to heat?
Temperature and heat are the same thing
Temperature is a measure of heat
Raising the temperature causes the heat to increase
Heat causes a change in the temperature of an object
4
Why does a red shirt appear red to your eyes?
it reflects every color except red
it absorbs every color except red
it reflects all colors in white light
it absorbs all colors in white light
5
What type of energy is stored in batteries?
kinetic
elastic
chemical
thermal
6
What do microwaves transfer between a cell phone and a cell phone tower?
energy
sound
electricity
air particles
7
Which material is translucent?
clear plastic
frosted glass
construction paper
pure air
8
Which type of electromagnetic wave has the highest energy?
radio waves
infrared waves
visible light waves
microwaves
9
What must two objects have for gravity to exist between them?
roundness
solidness
volume
mass
10
Which of these statements describes a physical change?
Onions taste sweeter after they are cooked.
Aluminum cans getting crushed before recycling.
Copper turning green when exposed to air.
A banana starts to smell as it ripens.
11
Which of these particles is the smallest?
a nucleus
a proton
an atom
an electron
12
In the picture below, what part of a wave is represented by B?
amplitude
trough
wavelength
crest
13
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 reaction
a chemical change
14
Which of these is a chemical property of a sheet of paper?
the paper does not attract magnets
the paper can be crumpled
the paper can be burned
the paper does not conduct electricity
15
Which unit is used to measure distance?
centimeters
milliliters
grams
seconds
16
A solid rock is sitting on the ground. What best describes the particles inside the rock?
always moving from place to place
constantly sliding over each other
not moving at all
vibrating, but not changing place
17
Which form of electromagnetic energy has the shortest wavelength?
infrared waves
radio waves
gamma rays
ultraviolet waves
18
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
19
Which of these statements correctly describes the law of conservation of energy?
The energy destroyed when objects stop is equal to the mass
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
20
The sidewalk is heated on a hot day. How do the sidewalk particles change?
They move closer together
Their kinetic energy decreases
They move freely from place to place
They move faster
21
A car battery stores 12V of energy. If 9V is converted to electricity, what is the efficiency?
0.25%
75%
0.75%
25%
22
Through which of these media do sound waves travel most slowly?
wood
water
iron
cold air
23
The image below shows a wave. What type of wave is it?
medium
longitudinal
transverse
electromagnetic
24
What is the evidence that an unbalanced force is acting on an object?
The object has constant velocity.
The object remains at rest.
The motion of the object is changing.
The mass of the object changes.
25
Erin warms hot chocolate in the microwave. What happens as the temperature increases?
The particles have less energy
The particles move slower
The particles move farther apart
The particles are arranged in a pattern
26
What is a unit of force in the metric system?
newton
pound
joule
kilogram
27
What property of a metal coin would be different on Mars than on the Earth?
mass
volume
density
weight
28
The picture below shows measurements made as a wave passed. What is the frequency of the wave?
2 Hz
5 seconds
2 seconds
0.5 Hz
29
A car drives straight for 45 miles during 1 hour. What else do you need to figure velocity?
how long the car stopped for
the total distance the car traveled
The direction the car traveled
how many times the car stopped
30
Which represents the greatest acceleration?
200cm/s2
0.002km/s2
0.020km/s2
200 m/s
31
What is a wave?
any type of energy that makes particles move
any type of matter that vibrates back and forth
a disturbance that transfers energy
a disturbance that transfers matter
32
Calcium is an element. What is the smallest particle you can have of calcium?
a proton from calcium
an electron from calclum
an atom of calcium
a molecule that contains calcium
33
A lamp has an electrical input of 120 watts. If 80 becomes light, how much is turned to heat?
more than 40 watts
exactly 40 watts
less than 40 watts
exactly 80 watts
34
What process is an example of a physical change?
sodium metal reacting with water
a sandwich being broken down by your stomach
baking soda and vinegar bubbling
carrots being cut up for a salad
35
What is true of an object that is in free fall?
the forces of air resistance and gravity are balanced
only gravity acts on the object
no forces act on the object
the forces of thrust and gravity are balanced
36
When paper is burned, the mass of the ash is less than the original paper. Why?
Some of the products were given off as a gas.
The mass of the ash cannot be accurately measured.
the ash has less volume than the paper.
Some of the matter is destroyed during burning.
37
Which of these substances is a compound?
chlorine
ammonia
uranium
nitrogen
38
In which state of matter are the particles able to move around one another?
solids, liquids and gases.
gases only
liquids only
gases and liquids only
39
As an ice cube melts into a liquid, what property of the water remains unchanged?
mass
volume
temperature
density
40
Why do you weigh less on the moon than on Earth?
the moon has a smaller radius
the moon is more dense than Earth
the moon is closer to the sun
the moon has less mass than Earth
41
Which state of matter takes up both the volume and shape of the container that holds it?
liquid
solid
gas
ice
42
How does fiberglass insulation keep your home warm in the winter?
The fiberglass absorbs energy
The fiberglass generates heat
The fiberglass is an insulator
The air trapped in the fiberglass is an insulator
43
Which property of matter does not change regardless of how big a sample you have?
reactivity with oxygen
volume
density
flammability
