stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
8th Grade Physical Science Review Flashcards | StudBud
Explore
/
8th Grade Physical Science Review
8th Grade Physical Science Review
30 terms
·
StudBud Administration
·
103 plays
review for upcoming standardized test
Flashcards
30 cards
F
Practice quiz
P
Host live
L
Questions
30
Answers
1
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
The amount of Kinetic Energy is a constant value
Objects can only have potential or kinetic energy, not both
2
A car drives straight for 45 miles during 1 hour. What else do you need to figure velocity?
the total distance the car traveled
how long the car stopped for
The direction the car traveled
how many times the car stopped
3
What property of a metal coin would be different on Mars than on the Earth?
density
weight
volume
mass
4
What are you measuring when you take the temperature of something?
average kinetic energy
average potential energy
kinetic energy
potential energy
5
Which property of matter does not change regardless of how big a sample you have?
reactivity with oxygen
flammability
volume
density
6
What process is an example of a physical change?
a sandwich being broken down by your stomach
carrots being cut up for a salad
baking soda and vinegar bubbling
sodium metal reacting with water
7
The sidewalk is heated on a hot day. How do the sidewalk particles change?
They move closer together
They move freely from place to place
Their kinetic energy decreases
They move faster
8
Which state of matter takes up both the volume and shape of the container that holds it?
ice
solid
liquid
gas
9
As you watch ice cream melting on a hot day, what are you observing?
a chemical reaction
the formation of a new substance
a physical change
a chemical change
10
What must two objects have for gravity to exist between them?
volume
mass
roundness
solidness
11
Erin warms hot chocolate in the microwave. What happens as the temperature increases?
The particles move slower
The particles are arranged in a pattern
The particles have less energy
The particles move farther apart
12
Which unit is used to measure distance?
grams
centimeters
seconds
milliliters
13
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
14
What is a unit of force in the metric system?
newton
pound
kilogram
joule
15
What type of energy is stored in batteries?
elastic
thermal
chemical
kinetic
16
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 is more dense than Earth
the moon has less mass than Earth
17
A solid rock is sitting on the ground. What best describes the particles inside the rock?
constantly sliding over each other
always moving from place to place
vibrating, but not changing place
not moving at all
18
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.
19
Which represents the greatest acceleration?
0.002km/s2
0.020km/s2
200cm/s2
200 m/s
20
What is true of an object that is in free fall?
the forces of thrust and gravity are balanced
only gravity acts on the object
the forces of air resistance and gravity are balanced
no forces act on the object
21
What is the evidence that an unbalanced force is acting on an object?
The motion of the object is changing.
The object has constant velocity.
The mass of the object changes.
The object remains at rest.
22
The data below is for a moving car. What is the average speed of the car?
20 m/s
40 m/s
120 m/s
60 m/s
23
Which of these particles is the smallest?
a nucleus
an atom
an electron
a proton
24
Calcium is an element. What is the smallest particle you can have of calcium?
an electron from calclum
an atom of calcium
a proton from calcium
a molecule that contains calcium
25
As an ice cube melts into a liquid, what property of the water remains unchanged?
mass
density
temperature
volume
26
Which of these substances is a compound?
ammonia
chlorine
nitrogen
uranium
27
What is a wave?
a disturbance that transfers matter
any type of energy that makes particles move
any type of matter that vibrates back and forth
a disturbance that transfers energy
28
Which of these statements describes a physical change?
A banana starts to smell as it ripens.
Onions taste sweeter after they are cooked.
Copper turning green when exposed to air.
Aluminum cans getting crushed before recycling.
29
What is heat?
Change in the temperature in degrees Celsius
Energy transferred between two objects
Average kinetic energy of the particles in a substance
Total thermal energy of a substance
30
Which of these is a chemical property of a sheet of paper?
the paper does not attract magnets
the paper does not conduct electricity
the paper can be crumpled
the paper can be burned
