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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
35 terms
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review for upcoming standardized test #physicalscience #matter #force #motion
Flashcards
35 cards
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Practice quiz
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Questions
35
Answers
1
Through which of these media do sound waves travel most slowly?
water
wood
iron
cold air
2
What property of a metal coin would be different on Mars than on the Earth?
density
volume
weight
mass
3
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
4
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
5
As an ice cube melts into a liquid, what property of the water remains unchanged?
temperature
density
volume
mass
6
Why do you weigh less on the moon than on Earth?
the moon has less mass than Earth
the moon is closer to the sun
the moon has a smaller radius
the moon is more dense than Earth
7
Which unit is used to measure distance?
seconds
milliliters
centimeters
grams
8
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
9
Which type of electromagnetic wave has the highest energy?
infrared waves
visible light waves
microwaves
radio waves
10
A car drives straight for 45 miles during 1 hour. What else do you need to find velocity?
The direction the car traveled
how many times the car stopped
how long the car stopped for
the total distance the car traveled
11
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.
12
What must two objects have for gravity to exist between them?
volume
solidness
mass
roundness
13
In which state of matter are the particles able to move around one another?
liquids only
solids, liquids and gases.
gases only
gases and liquids only
14
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
15
How is temperature related to heat?
Heat causes a change in the temperature of an object
Temperature and heat are the same thing
Raising the temperature causes the heat to increase
Temperature is a measure of heat
16
What is heat?
Total thermal energy of a substance
Energy transferred between two objects
Average kinetic energy of the particles in a substance
Change in the temperature in degrees Celsius
17
Which of these particles is the smallest?
a proton
an electron
a nucleus
an atom
18
Which of these statements correctly describes the law of conservation of energy?
The energy destroyed when objects stop is equal to the mass
The amount of Kinetic Energy is a constant value
Energy cannot be created nor destroyed, but can change forms
Objects can only have potential or kinetic energy, not both
19
Which of these statements describes a physical change?
A banana starts to smell as it ripens.
Aluminum cans getting crushed before recycling.
Copper turning green when exposed to air.
Onions taste sweeter after they are cooked.
20
What are you measuring when you take the temperature of something?
average potential energy of particles
potential energy of particles
average kinetic energy of particles
kinetic energy of particles
21
The data below is for a moving car. What is the average speed of the car in meters per sec?
60 m/s
20 m/s
40 m/s
120 m/s
22
Erin warms hot chocolate in the microwave. What happens as the temperature increases?
The particles move faster and farther apart
The particles have less energy
The particles move slower and closer together
The particles are arranged in a pattern
23
Which property of matter does not change regardless of how big a sample you have?
flammability
reactivity with oxygen
volume
density
24
Calcium is an element. What is the smallest particle you can have of calcium?
an electron from calclum
an atom of calcium
a molecule that contains calcium
a proton from calcium
25
Which state of matter takes up both the volume and shape of the container that holds it?
ice
gas
solid
liquid
26
As you watch ice cream melting on a hot day, what are you observing?
the formation of a new substance
a chemical change
a chemical reaction
a physical change
27
A solid rock is sitting on the ground. What best describes the particles inside the rock?
constantly sliding over each other
vibrating, but not changing place
always moving from place to place
not moving at all
28
What is true of an object that is in free fall (falling without speed changing)?
the forces of air resistance and gravity are balanced
the forces of thrust and gravity are balanced
no forces act on the object
only gravity acts on the object
29
What do microwaves transfer between a cell phone and a cell phone tower?
sound
electricity
air particles
energy
30
What type of energy is stored in batteries?
chemical
kinetic
elastic
thermal
31
The sidewalk is heated on a hot day. How do the sidewalk particles change?
They move faster
Their kinetic energy decreases
They move freely from place to place
They move closer together
32
Which material is translucent (mostly but not completely allows light to pass through)?
pure air
construction paper
frosted glass
clear plastic
33
What is a unit of force in the metric system?
joule
newton
kilogram
pound
34
Which form of electromagnetic energy has the shortest wavelength?
gamma rays
ultraviolet waves
radio waves
infrared waves
35
When paper is burned, the mass of the ash is less than the original paper. Why?
The mass of the ash cannot be accurately measured.
Some of the products were given off as a gas.
Some of the matter is destroyed during burning.
the ash has less volume than the paper.
