Worksheets7th Grade Science Midterm Practice Part 1
Total questions: 50
Worksheet time: 25mins
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?*
1 point
visible light waves
radio waves
x-rays
microwaves
The diagram below shows what happens when light energy strikes the surface of a colored glass plate. Which light ray is refracted?
A
B
C
D
The diagram below shows what happens when light energy strikes the surface of a colored glass plate. Which light ray is transmitted and reflected?
A
B
C
D
The diagram below shows what happens when light energy strikes the surface of a colored glass plate. Which light ray is absorbed and reflected
A
B
C
D
The diagram below shows what happens when light energy strikes the surface of a colored glass plate. Which light ray is reflected?
A
B
C
D
Which of the following waves require a medium?
Electromagnetic waves
Mechanical waves
Light waves
X-rays
The ____ of waves can change when the waves move from one medium to another.
Altitude
Amplitude
Speed
Compression
Waves can ____ when they move from one medium to another.
disappear
interfere
bend
split
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?
A
B
C
D
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?
Absorption
Refraction
Scattering
Transmission
In which of these situations would light slow down?
From glass to air
From ice to water
From plastic to air
From a vacuum to air
In the diagram below, what wave property is being identified by the letter A
The amplitude
The wavelength
The frequency
The period
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?
The frequency
The amplitude
The wavelength
The period
Which statement is true regarding mechanical and electromagnetic waves?
Both types of waves require a medium
Neither type of wave requires a medium
A mechanical wave requires a medium, but an electromagnetic wave does not
The speed of an electromagnetic wave can be affected by a medium, but the speed of a mechanical wave cannot
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?
It speeds up
It slows down
It remains the same
It speeds up and then slows down
The diagram below represents the electromagnetic spectrum. What is the relationship between frequency and wavelength for electromagnetic waves?
Frequency equals wavelength
As frequency increases, wavelength increases
As frequency increases, wavelength decreases
The relationship depends on the speed of the wave
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?
All forms of electromagnetic radiation travel at the same speed through a vacuum/space
All forms of electromagnetic radiation have the same frequency
All forms of electromagnetic radiation have the same wavelength
All forms of electromagnetic radiation have the same amount of energy
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?
The energy must be very low
Their frequency must be very low
Their wavelengths must be very short
Their waves can travel without a medium
Four examples of electromagnetic waves are microwaves, radio waves, infrared waves, and visible light waves. Which of these waves has the MOST energy?
Microwaves
Radio waves
Infrared waves
Visible light waves
An image of a distant object caused by refraction of light is called a ______
Prism
Mirage
Rainbow
Refracted medium
The bending of light rays as they enter a new medium is called _____
Diffuse reflection
Regular reflection
Refraction
Diffraction
How does the Sun transfer energy to Earth?
By making Earth spin
By making mechanical waves
By electromagnetic waves
By the Earth revolving around the sun
In which medium does sound travel the fastest?
Steel
Air
Water
The speed is the same in all three mediums
Visible light has a higher frequency than _____
x-rays
ultraviolet rays
infrared rays
gamma rays
All of the following affect the speed of sound through different substances EXCEPT
The color of the substances
The temperature of the substance
The compressibility of the substance
The density of the substance
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.
Energy flow from Joe's glass of ice tea to his hand holding the glass
Energy flow from the cool water in the swimming pool to Joe's body
Energy from the air inside of the air conditioned house to the pool deck
Energy flow from Joe's body to the cool water of the swimming pool
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.
Thermal energy flows from her hand to the ice cube
Thermal energy flows from the ice cube to her hand
Thermal energy flows back and forth between her hand and the ice cube
Thermal energy does not flow between objects at different temperatures
Which direction would the heat flow between these two objects? Ice cube and water
From the ice cube to the water
From the water to the ice cube
Back and forth between the two
Heat would not flow between these two objects
What can cause a change of state in a system?
Potential energy
Nuclear energy
Thermal energy
Chemical energy
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?
Nuclear
Electromagnetic
Chemical
Kinetic
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?
Some of the kinetic energy is converted into chemical energy
Some of the kinetic energy is converted to heat due to friction
Some of the potential energy is converted into electrical energy
Some of the potential energy is converted into electricity due to friction
Whenever energy is transferred _____
Heat is released
Potential energy increases
Some energy is destroyed
Temperature increased
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?
chemical to electrical to radiant and thermal
mechanical to thermal
thermal to mechanical
chemical to mechanical and thermal
Heat is the transfer of _____
electromagnetic energy
mechanical energy
thermal energy
nuclear energy
David ate a cheeseburger at lunch. What kind of energy was in his cheeseburger?
nuclear energy
electrical energy
electromagnetic energy
chemical energy
Which is an example of evidence that energy is neither created nor lost during a transformation?
ice melts in the sun
ice does not melt in the hot sun
when a driver of car applies the car's brakes, friction heats the brakes
if you drop a tennis ball, the tennis ball will never stop bouncing
What happens when heat is added to gas in a sealed container?
The particles of gas slow down
The particles of gas speed up
The motion of the particles does not change
The particles of gas from a pile on the bottom of the container
What can happen when enough heat is added to or removed from a system?
The substances in a system will change state
The system will break down
The motion of the particles does not change
The particles of gas form a pile on the bottom of the container
The law of conservation of energy states that when one form of energy is transformed to another, __________,
energy is destroyed in the process
no energy is destroyed in the process
energy is crated in the process
some amount of energy cannot be accounted for
In a hydroelectric plant the mechanical energy is moving water is transformed into ________
nuclear energy
electrical energy
electromagnetic energy
chemical energy
Which statement describes the direction of heat flow?
heart flows between two objects at the same temperture
thermal energy can only be absorbed by cool objects
heat flows from a warmer object to a cooler object
heat flows from a cooler object to a warmer object
The measure of the average kinetic energy of the individual particles in an object is called?
thermal energy
conduction
convection
temperature
The total energy of all the particles in a substance is called _________
temperature
thermal energy
degrees
mass
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?
conduction
convection
radiation
specific heat
As a car skids to a stop, friction transforms energy to _____.
thermal energy
nuclear energy
chemical energy
electrical energy
Water bubbles through a hot spring at Yellowstone National Park. What method of heat transfer is this?
conduction
convection
radiation
specific heat
Heat is transferred from one particle of matter to another within an object or between two objects in a process called _____
conduction
convection
radiation
insulation
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?
the particles in the popsicle slow down and the shape changes.
the particles in the popsicle speed up and the popsicle not longer has a definite shape.
The particles in the popsicle stop moving.
The popsicle's shape and volume remain the same
Heated air moves from a space heater to the rest of a room in a process called _________
Conduction
Convection
Radiation
Insulation
Which of the following statement is TRUE?
The particles in an object at 40 degrees Celsius are moving slower than particles at 35 degrees Celsius
The particles in an object at 45 degrees Celsius are moving slower than particles at 40 degrees Celsius
The particles in an object at 40 degrees Celsius are moving faster than particles at 0 degree Celsius
The particles in an object at 40 degrees Celsius are moving faster than particles at 100 degrees Celsius
