Quiz about 7th Grade Science4 Midterm Review

Question 1

Jean Paul has investigated the wavelengths of some common types of waves.  He has organized his findings in the following data table.  Which waves that Jean Paul researched has the highest frequency?

Accepted Answer

x-rays

Answer

visible light waves

Answer

radio waves

Answer

microwaves

Question 2

The diagram below shows what happens when light energy strikes the surface of a colored glass plate.  Which light ray is refracted?

Accepted Answer

D

Answer

A

Answer

B

Answer

C

Question 3

The diagram below shows what happens when light energy strikes the surface of a colored glass plate. Which light ray is transmitted and reflected?

Accepted Answer

C

Answer

A

Answer

B

Answer

D

Question 4

The diagram below shows what happens when light energy strikes the surface of a colored glass plate.  Which light ray is absorbed and reflected

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Question 5

The diagram below shows what happens when light energy strikes the surface of a colored glass plate. Which light ray is reflected?

Accepted Answer

A

Answer

B

Answer

C

Answer

D

Question 6

Which of the following waves require a medium?

Accepted Answer

Mechanical waves

Answer

Electromagnetic waves

Answer

Light waves

Answer

x-rays

Question 7

The ____ of waves can change when the waves move from one medium to another.

Accepted Answer

Speed

Answer

Altitude

Answer

Amplitude

Answer

Compression

Question 8

Waves can ____ when they move from one medium to another.

Accepted Answer

bend

Answer

disappear

Answer

interfere

Answer

split

Question 9

In a mechanical wave, like those in an earthquake, amplitude is related to the amount of energy the wave carries.  Waves with high amplitude carry a lot of energy.  The diagram below shows a series of waves.  Which wave would cause the biggest earthquake?

Accepted Answer

D

Answer

A

Answer

B

Answer

C

Question 10

Heather puts a straw into a glass of water.  She notices that the straw appears to be broken when she looks through the glass and the water from the side.  Which term BEST explains why the straw looks like it is broken?

Accepted Answer

Refraction

Answer

Absorption

Answer

Scattering

Answer

Transmission

Question 11

In which of these situations would light slow down?

Accepted Answer

From a vacuum to air

Answer

From glass to air

Answer

From ice to water

Answer

From plastic to air

Question 12

In the diagram below, what wave property is being identified by the letter A

Accepted Answer

The wavelength

Answer

The amplitude

Answer

The frequency

Answer

The period

Question 13

Caleb counts the number of waves that pass a given point in certain amount of time on the beach.  Which property of waves does Caleb measure?

Accepted Answer

The frequency

Answer

The amplitude

Answer

The wavelenght

Answer

The period

Question 14

Which statement is true regarding mechanical and electromagnetic waves?

Accepted Answer

A mechanical wave requires a medium, but an electromagnetic wave does not

Answer

Both types of waves require a medium

Answer

Neither type of wave requires a medium

Answer

The speed of an electromagnetic wave can be affected by a medium, but the speed of a mechanical wave cannot

Question 15

The medium through which a mechanical wave passes can be a solid, a liquid, or a gas. Properties of a wave might change when it moves from one medium to another. What happens to the speed of mechanical wave when it moves from a gas to a solid?

Accepted Answer

It speeds up

Answer

It slows down

Answer

It remains the same

Answer

It speeds up and then slows down

Question 16

The diagram below represents the electromagnetic spectrum.  What is the relationship between frequency and wavelength for electromagnetic waves?

Accepted Answer

As frequency increases, wavelength decreases

Answer

Frequency equals wavelength

Answer

As frequency increases, wavelength increases

Answer

The relationship depends on the speed of the wave

Question 17

Electromagnetic radiation is energy that travels in waves. Some examples of electromagnetic radiation are visible light, radio waves and x-rays.  Which statement is TRUE for all forms of electromagnetic radiation?

Accepted Answer

All forms of electromagnetic radiation travel at the same speed through a vacuum/space

Answer

All forms of electromagnetic radiation have the same frequency

Answer

All forms of electromagnetic radiation have the same wavelength

Answer

All forms of electromagnetic radiation have the same amount of energy

Question 18

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. Which is a logical conclusion about these electromagnetic waves?

Accepted Answer

Their waves can travel without a medium

Answer

The energy must be very low

Answer

Their frequency must be very low

Answer

Their wavelengths must be very short

Question 19

Four examples of electromagnetic waves are microwaves, radio waves, infrared waves, and visible light waves.  Which of these waves has the MOST energy?

Accepted Answer

Visible light waves

Answer

Microwaves

Answer

Radio waves

Answer

Infrared waves

Question 20

An image of a distant object caused by refraction of light is called a ______

Accepted Answer

Mirage

Answer

Prism

Answer

Rainbow

Answer

Refracted medium

Question 21

The bending of light rays as they enter a new medium is called _____

Accepted Answer

Refraction

Answer

Diffuse reflection

Answer

Regular reflection

Answer

Diffraction

Question 22

How does the Sun transfer energy to Earth?

Accepted Answer

By electromagnetic waves

Answer

By making Earth spin

Answer

By making mechanical waves

Answer

By the Earth revolving around the sun

Question 23

In which medium does sound travel the fastest?

Accepted Answer

Steel

Answer

Air

Answer

Water

Answer

The speed is the same in all three mediums

Question 24

Visible light has a higher frequency than _____

Accepted Answer

infrared rays

Answer

x-rays

Answer

ultraviolet rays

Answer

gamma rays

Question 25

All of the following affect the speed of sound through different substances EXCEPT _______

Accepted Answer

The color of the substances

Answer

The temperature of the substance

Answer

The compressibility of the substance

Answer

The density of the substance

Question 26

Energy flows as heat when there is a difference in temperature between two objects or mediums.  The greater the difference, the faster the energy will flow.  Energy will flow from an area of higher temperature to an area of lower temperature. Joe is swimming in the cool water of his swimming pool on a hot summer day. Read the following examples and choose the statement with the correct direction of energy flow.

Accepted Answer

Energy flow from Joe's body to the cool water of the swimming pool

Answer

Energy flow from Joe's glass of ice tea to his hand holding the glass

Answer

Energy flow from the cool water in the swimming pool to Joe's body

Answer

Energy from the air inside of the air conditioned house to the pool deck

Question 27

Energy flows as heat when there is a difference in temperature between two objects or mediums.  The greater the difference, the faster the energy will flow.  Energy will flow from an area of higher temperature to an area of lower temperature.Which of the following describes the flow of thermal energy that occurs as a student holds a piece of ice in her hand.

Accepted Answer

Thermal energy flows from her hand to the ice cube

Answer

Thermal energy flows from the ice cube to her hand

Answer

Thermal energy flows back and forth between her hand and the ice cube

Answer

Thermal energy does not flow between objects at different temperatures

Question 28

Which direction would the heat flow between these two objects? Ice cube and water

Accepted Answer

From the water to the ice cube

Answer

From the ice cube to the water

Answer

Back and forth between the two

Answer

Heat would not flow between these two objects

Question 29

What can cause a change of state in a system?

Accepted Answer

Thermal energy

Answer

Potential energy

Answer

Nuclear energy

Answer

Chemical energy

Question 30

A series of energy transformation must occur before food, such as corn, can provide you with the energy you need to ride your bike. Reactions occur within the sun to transform nuclear energy into electromagnetic energy.  Plants transform electromagnetic energy into chemical energy when they produce food, such as corn.  Your body transforms chemical energy into _______ energy when you ride your bike. Which form of energy best completes the previous sentence?

Accepted Answer

Kinetic

Answer

Nuclear

Answer

Electromagnetic

Answer

Chemical

Question 31

The Law of Conservation of Energy states that "Energy cannot be created nor destroyed but can change form" An example of this would be the conversation of potential energy to kinetic energy as an object falls to the ground. Skate boarders use this conversation of potential energy to kinetic energy to travel from one side of a half pipe to another. A half pipe is a U-shaped structure which skate boarders ride from one side to the other. If a skate boarder started from the top of a half pipe that was 3 meters from the ground, he would get to the other side but never to the very top.  How can this be explained?

Accepted Answer

Some of the kinetic energy is converted to heat due to friction

Answer

Some of the kinetic energy is converted into chemical energy

Answer

Some of the potential energy is converted into electrical energy

Answer

Some of the potential energy is converted into electricity due to friction

Question 32

Whenever energy is transferred _____

Accepted Answer

Heat is released

Answer

Potential energy increases

Answer

Some energy is destroyed

Answer

Temperature increased

Question 33

In the diagram below, energy is being converted from one form to another and some energy is being transformed into unusable heat energy. What energy conversions are taking place?

Accepted Answer

chemcial to electrical to radiant and thermal

Answer

mechanical to thermal

Answer

thermal to mechanical

Answer

chemical to mechanical and thermal

Question 34

Heat is the transfer of _____

Accepted Answer

thermal energy

Answer

electromagnetic energy

Answer

mechanical energy

Answer

nuclear energy

Question 35

David ate a cheeseburger at lunch. What kind of energy was in his cheeseburger?

Accepted Answer

chemical energy

Answer

nuclear energy

Answer

electrical energy

Answer

electromagnetic energy

Question 36

Which is an example of evidence that energy is neither created nor lost during a transformation?

Accepted Answer

when a driver of car applies the car's brakes, friction heats the brakes

Answer

ice melts in the sun

Answer

ice does not melt in the hot sun

Answer

if you drop a tennis ball, the tennis ball will never stop bouncing

Question 37

What happens when heat is added to gas in a sealed container?

Accepted Answer

The particles of gas speed up

Answer

The particles of gas slow down

Answer

The motion of the particles does not change

Answer

The particles of gas from a pile on the bottom of the container

Question 38

What can happen when enough heat is added to or removed from a system?

Accepted Answer

The substances in a system will change state

Answer

The system will break down

Answer

The motion of the particles does not change

Answer

The particles of gas form a pile on the bottom of the container

Question 39

The law of conservation of energy states that when one form of energy is transformed to another, __________,

Accepted Answer

no energy is destroyed in the process

Answer

energy is destroyed in the process

Answer

energy is crated in the process

Answer

some amount of energy cannot be accounted for

Question 40

In a hydroelectric plant the mechanical energy is moving water is transformed into ________

Accepted Answer

electrical energy

Answer

nuclear energy

Answer

electromagnetic energy

Answer

chemical energy

Question 41

Which statement describes the direction of heat flow?

Accepted Answer

heat flows from a warmer object to a cooler object

Answer

heart flows between two objects at the same temperture

Answer

thermal energy can only be absorbed by cool objects

Answer

heat flows from a cooler object to a warmer object

Question 42

The measure of the average kinetic energy of the individual particles in an object is called?

Accepted Answer

temperature

Answer

thermal energy

Answer

conduction

Answer

convection

Question 43

The total energy of all the particles in a substance is called _________

Accepted Answer

thermal energy

Answer

temperature

Answer

degrees

Answer

mass

Question 44

On a sunny day, you return to your car after a ball game and the inside of the car is very hot.  How did the car get so warm?

Accepted Answer

radiation

Answer

conduction

Answer

convection

Answer

specific heat

Question 45

As a car skids to a stop, friction transforms energy to _____.

Accepted Answer

thermal energy

Answer

nuclear energy

Answer

chemical energy

Answer

electrical energy

Question 46

Water bubbles through a hot spring at Yellowstone National Park.  What method of heat transfer is this?

Accepted Answer

convection

Answer

conduction

Answer

radiation

Answer

specific heat

Question 47

Heat is transferred from one particle of matter to another within an object or between two objects in a process called _____

Accepted Answer

conduction

Answer

convection

Answer

radiation

Answer

insulation

Question 48

A solid, such as a popsicle, has a definite shape and definite volume. If you add heat to the Popsicle by leaving it in the sun, what happens to it?

Accepted Answer

the particles in the popsicle speed up and the popsicle not longer has a definite shape.

Answer

the particles in the popsicle slow down and the shape changes.

Answer

The particles in the popsicle stop moving.

Answer

The popsicle's shape and volume remain the same

Question 49

Heated air moves from a space heater to the rest of a room in a process called _________

Accepted Answer

Convection

Answer

Conduction

Answer

Radiation

Answer

Insulation

Question 50

Which of the following statement is TRUE?

Accepted Answer

The particles in an object at 40 degrees Celsius are moving faster than particles at 0 degree  Celsius

Answer

The particles in an object at 40 degrees Celsius are moving slower than particles at 35 degrees Celsius

Answer

The particles in an object at 45 degrees Celsius are moving slower than particles at 40 degrees Celsius

Answer

The particles in an object at 40 degrees Celsius are moving faster than particles at 100 degrees Celsius

Question 51

One way to reduce bias in an experiment is to

Accepted Answer

take numerical measurements of results

Answer

ask only girls about a school topic

Answer

use descriptive phrases as your data

Answer

make sure that the results come out the way you want them

Question 52

Which is an example of using ethics in experiments?

Accepted Answer

Informing human subjects of possible risks before taking part in a scientific study

Answer

A scientist changing his data from his experiment to match his hypothesis

Answer

not testing medicine before it's sold to the public

Answer

experimenting without considering the effects on the environment

Question 53

Observations that deal with descriptions that cannot be expressed in numbers is called _________

Accepted Answer

qualitative observations

Answer

manipulated observations

Answer

quantitative observations

Answer

responding observations

Question 54

Joe decides that cereal is the best breakfast because he thinks cereal tastes better than other breakfast foods. Joe is being ___________

Accepted Answer

subjective

Answer

honest

Answer

objective

Answer

ethical

Question 55

Jacquelyn conducted an experiment to find out what happens to the temperature of water after it starts boiling. She measured the temperature of the water every 30 seconds during the experiment. She wants to graph her data.  If she puts temperature on the y-axis, what variable belongs on the x - axis?

Accepted Answer

time

Answer

water

Answer

state of matter

Answer

boiling point of water

Question 56

A scientist conducts an experiment to test a hypothesis. During the experiment, the scientist takes careful notes of the procedures followed and the results obtained. After the scientist completes the experiment, she shares this information with others who work at the same laboratory. Why is it important for a scientist to keep accurate records of the procedure and results of an experiment?

Accepted Answer

Accurate records allow others to repeat the experiment

Answer

Accurate records explain how the hypothesis was formed

Answer

Accurate records show why a hypothesis is not supported

Answer

The records help other scientists save time by not repeating the experiment

Question 57

Scientist conduct multiple trials on their experiments because ______

Accepted Answer

Their results are more likely to be reliable

Answer

It costs less to run more trials than fewer trials

Answer

Unusual occurrences are likely to be repeated every time

Answer

Experiments always have the same results

Question 58

Botanists study plants. Chemists study matter and its interactions. Volcanologists study volcanoes. What similarity exists among scientists working in these fields?

Accepted Answer

They all gather information to answer questions about the natural world.

Answer

They all use the same tools in their work.

Answer

They all do their research exactly the same way.

Answer

No similarities exist among scientist working in different fields.

Question 59

A factor in an experiment that stays the same to make the experiment reliable is ______________

Accepted Answer

a constant

Answer

the independent variable

Answer

the dependent variable

Answer

a control group

Question 60

Joaquin wants to learn about the effect different amounts of sunlight have on plants. He sets up tables with eight different plants. Every part of his experiment should be the same except the variable he is testing.  What is the variable?

Accepted Answer

The amount of sunlight each plant recieves

Answer

The type of plant

Answer

The amount of water received by each plant

Answer

The amount of nutrients he gives each plant

Question 61

Scientists should _____ new ideas that they may not agree with.

Accepted Answer

listen and consider

Answer

ignore

Answer

laugh at

Answer

dismiss

Question 62

When scientists create a representation of a complex process, they are ___________

Accepted Answer

making models

Answer

inferring

Answer

predicting

Answer

classifying

Question 63

Current scientific knowledge holds that dinosaurs went extinct about 65 million years ago. Suppose a paleontologist discovers a bone from a previously unknown dinosaur species. Repeated tests and radioactive dating show that this bone is only 35 million years old. How is the discovery likely to impact current theories about dinosaur extinction?

Accepted Answer

The current ideas about dinosaur extinction may be modified.

Answer

The evidence will be dismissed as wrong.

Answer

The evidence will be ignored.

Answer

All current ideas about dinosaur extinction will be discarded.

Question 64

What happens when similar investigation give different results?

Accepted Answer

Further study is done to see if the differences are important.

Answer

Scientists stop working on the problem.

Answer

Scientist stop sharing data.

Answer

The hypothesis is not true.

7th Grade Science4 Midterm Review

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