Read the question below.

She can form a new hypothesis and plan a new experiment.

Read the question below.

magnetic mapping of rocks reveals a buried crater in Mexico

Which process is an example of a physical change?

Water turns to steam when boiled over a Bunsen burner.

Which description best describes the solar nebula?

a rotating cloud of dust and gas

Which statement best describes volume?

amount of space that an object occupies

Read the question below.

prevent manatees from being trapped if it snags on something

Read the question below.

A gas has formed and left the mixture

What does a light-year measure?

the distance that light can travel in one year

Read the question below.

height from which the ball is released

Read the question below.

there is little attraction to hold them together

Which statement best describes centripetal force?

An unbalanced force that makes objects move in an ellipse

If a probe has mass=300kg and weight=660lbs on Earth, what would it be on Mars if gravity=1/3?

mass = 300 kg, weight = 220 lbs

What is atomic number?

the number of protons in the nucleus

studbud

8th Grade Semester Exam 2016

50 termsStudBud Administration311 plays

A #science quiz to review for semester exam

Flashcards50 cardsFPractice quizPHost liveL

Questions 50

Answers

1
How is density calculated?
length times width times height
mass divided by volume
amount of water displaced
mass multiplied by volume
2
What is the volume of a solid with a width of 5 cm, height of 6 cm, and length of 10 cm?
300 cm3
60 cm3
30 cm3
21 cm3
3
What type of substance is always made up of a single type of atom?
mixture
element
compound
molecule
4
Which statement is true of ALL matter?
It exists only as a solid
It has mass
It maintains its shape and size
It can be seen
5
What is the chemical symbol for iron?
Fe
Fr
Ir
Ti
6
What is the name given to a column on the periodic table?
period
trend
group
class
7
Which term describes a small body from which a planet forms?
protoplanetary disk
planetesimal
solar nebula
orbit
8
Which theory does this diagram illustrate?
Ptolemy's theory
Aristotle's theory
heliocentric theory
geocentric theory
9
Celestial bodies can be classified based on their sizes. Which is the smallest?
a planet
a supergiant
a red giant
the sun
10
What are pure substances?
compounds and mixtures
elements and mixtures
elements and compounds
homogeneous and heterogeneous mixtures
11
What must be true of any explanation scientists develop?
It must be shown to have practical value for humans
It must be based on info other scientists have also gathered
It must be testable
It must be proven correct
12
Which information or method did Ptolemy use to develop a model of the Solar System?
heliocentric theory
parallax problem
telescope observations
mathematical models
13
Binary star systems have 2 stars. Around which point are the stars rotating?
B
A
D
C
14
Which of the following terms is NOT matter?
light
paper
air
ice
15
Read the question below.
She can form a new hypothesis and plan a new experiment.
The results can be communicated with others for validity
She can use different material to see different results
The results explain why the materials perform differently.
16
Read the question below.
fossil remains of dinosaurs found in Mexico
rock studies that show the age of the rocks where meteor hit
magnetic mapping of rocks reveals a buried crater in Mexico
permanent change in world sea levels ~65 million years ago
17
Which process is an example of a physical change?
Water turns to steam when boiled over a Bunsen burner.
Carbon combines with oxygen to form carbon dioxide gas.
Limestone breaks down to lime and carbon dioxide when heated
Water breaks down into hydrogen and oxygen gases over time.
18
Which term describes a force of attraction between two objects that results from their masses?
gravity
planetesimal
orbit
aphelion
19
Which description best describes the solar nebula?
a small body from which a planet originates
a disk of material surrounding a young star
a rotating cloud of dust and gas
a rocky core surrounded by a deep atmosphere of gas and ice
20
Which of these common substances is a homogeneous mixture?
table salt
maple syrup
pure water
whole milk
21
Solution is another name for what type of matter?
element
compound
heterogeneous mixture
homogeneous mixture
22
What did Galileo conclude from his observations of Venus?
It has moons and the moons have phases.
It travels around the sun.
It is always lit.
It is farther from the sun than Earth is.
23
Read the question below.
solar system
galaxy
moon
universe
24
Which statement best describes volume?
amount of space that an object occupies
amount of matter in a given space
amount of pull exerted on an object by a gravitational field
amount of matter in an object
25
Which element has properties most similar to those of calcium (Ca)?
C
Kr
K
Mg
26
Muddy water is an example of what type of mixture?
homogeneous
suspension
solution
colloid
27
Which action involves a health issue of concern to most governments and international agencies?
searching for new oil and gas reserves
stopping the spread of disease
expanding the Internet to rural areas
promoting new trade agreements
28
What is the smallest particle of calcium that has the same chemical properties as calcium?
the nucleus of a calcium atom
an atom of calcium
an electron from a calcium atom
a molecule that contains calcium
29
Read the question below.
avoid collecting information on a manatee out of range
to destroy a tracking device the biologists consider faulty
prevent manatees from being trapped if it snags on something
to discourage other animals from coming near the manatees
30
Read the question below.
Vinegar evaporated during the experiment
Baking soda loses mass when dissolved in vinegar
Mass was destroyed when vinegar reacted with baking soda
A gas has formed and left the mixture
31
Read the question below.
slightly basic
highly basic
slightly acidic
highly acidic
32
Read the question below:
The mixture is cloudy in appearance
The container holds a mixture of a solid and liquid
The balloon gets lighter blue as it expands
The balloon fills and expands
33
What does a light-year measure?
the time it takes light to travel 1 million km
the number of years it takes light to travel to Earth
the distance that light can travel in one year
the brightness of light traveling through space
34
Which of the following is the same for all the elements in a group on the periodic table?
number of valence electrons
atomic number
number of neutrons
average atomic mass
35
Read the question below.
distance traveled by the ball
time it takes the ball to hit the ground
path of ball once it leaves the ramp
height from which the ball is released
36
Which of these choices is a physical property?
corrosiveness
reactivity
melting point
flammability
37
Read the question below.
the air particles can slide past one another
there is a strong attraction between them and the balloon
there is little attraction to hold them together
they increase in size when they have more space
38
A material being examined is the same throughout and contains carbon and oxygen. What is it?
homogeneous mixture
heterogeneous mixture
element
compound
39
Which statement best describes centripetal force?
force of attraction between two objects due to their masses
the path a body follows as it travels around a body in space
An unbalanced force that makes objects move in an ellipse
the point in an obit when the object is closest to the sun
40
What are visual or mathematical representations called?
models
observations
hypotheses
experiments
41
Which element is in Period 5, Group 7?
technetium
bohrium
niobium
dubnium
42
Which of these substances is an example of a solution?
concrete
milk
mercury
brass
43
Which process is an example of a chemical change?
cooking a steak
drying clothes in the dryer
making a cup of tea
chopping a tree
44
What characteristic of stars is measured by luminosity?
distance from Earth
temperature
size
brightness
45
What unit of length is used to express the size of stars?
light-year
kilometer
astronomical unit
solar radius
46
Which of the following applies only to solids?
particles always in motion
has a definite volume
has a definite shape
motionless particles
47
If a probe has mass=300kg and weight=660lbs on Earth, what would it be on Mars if gravity=1/3?
mass = 300 kg, weight = 660 lbs
mass = 900 kg, weight = 660 lbs
mass = 300 kg, weight = 220 lbs
mass = 100 kg, weight = 220 lbs
48
Burning wood into ash is an example of which kind of change?
chemical
displacement
physical
absorption
49
Which theory does this diagram illustrate?
Aristarchus' theory
geocentric theory
Copernicus' theory
heliocentric theory
50
What is atomic number?
the total number of protons and neutrons in an atom
total number of electrons, neutrons, & protons in an atom
the number of protons in the nucleus
half of the average atomic mass of an atom

8th Grade Semester Exam 2016 Flashcards | StudBud

8th Grade Semester Exam 2016

50 termsStudBud Administration311 plays

A #science quiz to review for semester exam

Flashcards50 cardsFPractice quizPHost liveL

Questions 50

Answers

1
How is density calculated?
length times width times height
mass divided by volume
amount of water displaced
mass multiplied by volume
2
What is the volume of a solid with a width of 5 cm, height of 6 cm, and length of 10 cm?
300 cm3
60 cm3
30 cm3
21 cm3
3
What type of substance is always made up of a single type of atom?
mixture
element
compound
molecule
4
Which statement is true of ALL matter?
It exists only as a solid
It has mass
It maintains its shape and size
It can be seen
5
What is the chemical symbol for iron?
Fe
Fr
Ir
Ti
6
What is the name given to a column on the periodic table?
period
trend
group
class
7
Which term describes a small body from which a planet forms?
protoplanetary disk
planetesimal
solar nebula
orbit
8
Which theory does this diagram illustrate?
Ptolemy's theory
Aristotle's theory
heliocentric theory
geocentric theory
9
Celestial bodies can be classified based on their sizes. Which is the smallest?
a planet
a supergiant
a red giant
the sun
10
What are pure substances?
compounds and mixtures
elements and mixtures
elements and compounds
homogeneous and heterogeneous mixtures
11
What must be true of any explanation scientists develop?
It must be shown to have practical value for humans
It must be based on info other scientists have also gathered
It must be testable
It must be proven correct
12
Which information or method did Ptolemy use to develop a model of the Solar System?
heliocentric theory
parallax problem
telescope observations
mathematical models
13
Binary star systems have 2 stars. Around which point are the stars rotating?
B
A
D
C
14
Which of the following terms is NOT matter?
light
paper
air
ice
15
Read the question below.
She can form a new hypothesis and plan a new experiment.
The results can be communicated with others for validity
She can use different material to see different results
The results explain why the materials perform differently.
16
Read the question below.
fossil remains of dinosaurs found in Mexico
rock studies that show the age of the rocks where meteor hit
magnetic mapping of rocks reveals a buried crater in Mexico
permanent change in world sea levels ~65 million years ago
17
Which process is an example of a physical change?
Water turns to steam when boiled over a Bunsen burner.
Carbon combines with oxygen to form carbon dioxide gas.
Limestone breaks down to lime and carbon dioxide when heated
Water breaks down into hydrogen and oxygen gases over time.
18
Which term describes a force of attraction between two objects that results from their masses?
gravity
planetesimal
orbit
aphelion
19
Which description best describes the solar nebula?
a small body from which a planet originates
a disk of material surrounding a young star
a rotating cloud of dust and gas
a rocky core surrounded by a deep atmosphere of gas and ice
20
Which of these common substances is a homogeneous mixture?
table salt
maple syrup
pure water
whole milk
21
Solution is another name for what type of matter?
element
compound
heterogeneous mixture
homogeneous mixture
22
What did Galileo conclude from his observations of Venus?
It has moons and the moons have phases.
It travels around the sun.
It is always lit.
It is farther from the sun than Earth is.
23
Read the question below.
solar system
galaxy
moon
universe
24
Which statement best describes volume?
amount of space that an object occupies
amount of matter in a given space
amount of pull exerted on an object by a gravitational field
amount of matter in an object
25
Which element has properties most similar to those of calcium (Ca)?
C
Kr
K
Mg
26
Muddy water is an example of what type of mixture?
homogeneous
suspension
solution
colloid
27
Which action involves a health issue of concern to most governments and international agencies?
searching for new oil and gas reserves
stopping the spread of disease
expanding the Internet to rural areas
promoting new trade agreements
28
What is the smallest particle of calcium that has the same chemical properties as calcium?
the nucleus of a calcium atom
an atom of calcium
an electron from a calcium atom
a molecule that contains calcium
29
Read the question below.
avoid collecting information on a manatee out of range
to destroy a tracking device the biologists consider faulty
prevent manatees from being trapped if it snags on something
to discourage other animals from coming near the manatees
30
Read the question below.
Vinegar evaporated during the experiment
Baking soda loses mass when dissolved in vinegar
Mass was destroyed when vinegar reacted with baking soda
A gas has formed and left the mixture
31
Read the question below.
slightly basic
highly basic
slightly acidic
highly acidic
32
Read the question below:
The mixture is cloudy in appearance
The container holds a mixture of a solid and liquid
The balloon gets lighter blue as it expands
The balloon fills and expands
33
What does a light-year measure?
the time it takes light to travel 1 million km
the number of years it takes light to travel to Earth
the distance that light can travel in one year
the brightness of light traveling through space
34
Which of the following is the same for all the elements in a group on the periodic table?
number of valence electrons
atomic number
number of neutrons
average atomic mass
35
Read the question below.
distance traveled by the ball
time it takes the ball to hit the ground
path of ball once it leaves the ramp
height from which the ball is released
36
Which of these choices is a physical property?
corrosiveness
reactivity
melting point
flammability
37
Read the question below.
the air particles can slide past one another
there is a strong attraction between them and the balloon
there is little attraction to hold them together
they increase in size when they have more space
38
A material being examined is the same throughout and contains carbon and oxygen. What is it?
homogeneous mixture
heterogeneous mixture
element
compound
39
Which statement best describes centripetal force?
force of attraction between two objects due to their masses
the path a body follows as it travels around a body in space
An unbalanced force that makes objects move in an ellipse
the point in an obit when the object is closest to the sun
40
What are visual or mathematical representations called?
models
observations
hypotheses
experiments
41
Which element is in Period 5, Group 7?
technetium
bohrium
niobium
dubnium
42
Which of these substances is an example of a solution?
concrete
milk
mercury
brass
43
Which process is an example of a chemical change?
cooking a steak
drying clothes in the dryer
making a cup of tea
chopping a tree
44
What characteristic of stars is measured by luminosity?
distance from Earth
temperature
size
brightness
45
What unit of length is used to express the size of stars?
light-year
kilometer
astronomical unit
solar radius
46
Which of the following applies only to solids?
particles always in motion
has a definite volume
has a definite shape
motionless particles
47
If a probe has mass=300kg and weight=660lbs on Earth, what would it be on Mars if gravity=1/3?
mass = 300 kg, weight = 660 lbs
mass = 900 kg, weight = 660 lbs
mass = 300 kg, weight = 220 lbs
mass = 100 kg, weight = 220 lbs
48
Burning wood into ash is an example of which kind of change?
chemical
displacement
physical
absorption
49
Which theory does this diagram illustrate?
Aristarchus' theory
geocentric theory
Copernicus' theory
heliocentric theory
50
What is atomic number?
the total number of protons and neutrons in an atom
total number of electrons, neutrons, & protons in an atom
the number of protons in the nucleus
half of the average atomic mass of an atom