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CAST - 8th Grade Physical Science Review Flashcards | StudBud
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CAST - 8th Grade Physical Science Review
CAST - 8th Grade Physical Science Review
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review for upcoming standardized test #physicalscience #matter #force #motion
Flashcards
27 cards
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Questions
27
Answers
1
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 has less mass than Earth
the moon is closer to the sun
2
What process is an example of a physical change?
baking soda and vinegar bubbling
a sandwich being broken down by your stomach
carrots being cut up for a salad
sodium metal reacting with water
3
Which state of matter takes up both the volume and shape of the container that holds it?
solid
gas
ice
liquid
4
Which property of matter does not change regardless of how big a sample you have?
flammability
reactivity with oxygen
volume
density
5
What is a unit of force in the metric system?
kilogram
newton
joule
pound
6
A solid rock is sitting on the ground. What best describes the particles inside the rock?
vibrating, but not changing place
always moving from place to place
not moving at all
constantly sliding over each other
7
As an ice cube melts into a liquid, what property of the water remains unchanged?
density
mass
volume
temperature
8
Which form of electromagnetic energy has the shortest wavelength?
radio waves
infrared waves
gamma rays
ultraviolet waves
9
Which of these statements describes a physical change?
Copper turning green when exposed to air.
Onions taste sweeter after they are cooked.
Aluminum cans getting crushed before recycling.
A banana starts to smell as it ripens.
10
As you watch ice cream melting on a hot day, what are you observing?
the formation of a new substance
a chemical change
a physical change
a chemical reaction
11
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
12
What is the evidence that an unbalanced force is acting on an object?
The object has constant velocity.
The motion of the object is changing.
The object remains at rest.
The mass of the object changes.
13
The sidewalk is heated on a hot day. How do the sidewalk particles change?
They move faster
They move closer together
They move freely from place to place
Their kinetic energy decreases
14
What do microwaves transfer between a cell phone and a cell phone tower?
air particles
energy
electricity
sound
15
Which unit is used to measure distance?
seconds
grams
milliliters
centimeters
16
Which type of electromagnetic wave has the highest energy?
infrared waves
radio waves
microwaves
visible light waves
17
What is heat?
Total thermal energy of a substance
Change in the temperature in degrees Celsius
Average kinetic energy of the particles in a substance
Energy transferred between two objects
18
What is a wave?
any type of matter that vibrates back and forth
any type of energy that makes particles move
a disturbance that transfers matter
a disturbance that transfers energy
19
What is true of an object that is in free fall (falling without speed changing)?
no forces act on the object
the forces of air resistance and gravity are balanced
the forces of thrust and gravity are balanced
only gravity acts on the object
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 all colors in white light
it reflects every color except red
21
Which material is translucent (mostly but not completely allows light to pass through)?
frosted glass
construction paper
pure air
clear plastic
22
Which of these statements correctly describes the law of conservation of energy?
The amount of Kinetic Energy is a constant value
The energy destroyed when objects stop is equal to the mass
Objects can only have potential or kinetic energy, not both
Energy cannot be created nor destroyed, but can change forms
23
Through which of these media do sound waves travel most slowly?
iron
water
wood
cold air
24
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
25
Erin warms hot chocolate in the microwave. What happens as the temperature increases?
The particles move faster and farther apart
The particles are arranged in a pattern
The particles have less energy
The particles move slower and closer together
26
What must two objects have for gravity to exist between them?
roundness
mass
volume
solidness
27
In which state of matter are the particles able to move around one another?
gases only
gases and liquids only
liquids only
solids, liquids and gases.
