Worksheets7th Grade Science4 Midterm Review
Total questions: 90
Worksheet time: 45mins
Name
Class
Date
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?
a)
visible light waves
b)
radio waves
c)
x-rays
d)
microwaves
2.
The diagram below shows what happens when light energy strikes the surface of a colored glass plate. Which light ray is refracted?
a)
A
b)
B
c)
C
d)
D
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?
a)
A
b)
B
c)
C
d)
D
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
a)
A
b)
B
c)
C
d)
D
5.
The diagram below shows what happens when light energy strikes the surface of a colored glass plate. Which light ray is reflected?
a)
A
b)
B
c)
C
d)
D
6.
Which of the following waves require a medium?
a)
Electromagnetic waves
b)
Mechanical waves
c)
Light waves
d)
x-rays
7.
The ____ of waves can change when the waves move from one medium to another.
a)
Altitude
b)
Amplitude
c)
Speed
d)
Compression
8.
Waves can ____ when they move from one medium to another.
a)
disappear
b)
interfere
c)
bend
d)
split
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?
a)
A
b)
B
c)
C
d)
D
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?
a)
Absorption
b)
Refraction
c)
Scattering
d)
Transmission
11.
In which of these situations would light slow down?
a)
From glass to air
b)
From ice to water
c)
From plastic to air
d)
From a vacuum to air
12.
In the diagram below, what wave property is being identified by the letter A
a)
The amplitude
b)
The wavelength
c)
The frequency
d)
The period
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?
a)
The frequency
b)
The amplitude
c)
The wavelenght
d)
The period
14.
Which statement is true regarding mechanical and electromagnetic waves?
a)
Both types of waves require a medium
b)
Neither type of wave requires a medium
c)
A mechanical wave requires a medium, but an electromagnetic wave does not
d)
The speed of an electromagnetic wave can be affected by a medium, but the speed of a mechanical wave cannot
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?
a)
It speeds up
b)
It slows down
c)
It remains the same
d)
It speeds up and then slows down
16.
The diagram below represents the electromagnetic spectrum. What is the relationship between frequency and wavelength for electromagnetic waves?
a)
Frequency equals wavelength
b)
As frequency increases, wavelength increases
c)
As frequency increases, wavelength decreases
d)
The relationship depends on the speed of the wave
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?
a)
All forms of electromagnetic radiation travel at the same speed through a vacuum/space
b)
All forms of electromagnetic radiation have the same frequency
c)
All forms of electromagnetic radiation have the same wavelength
d)
All forms of electromagnetic radiation have the same amount of energy
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?
a)
The energy must be very low
b)
Their frequency must be very low
c)
Their wavelengths must be very short
d)
Their waves can travel without a medium
19.
Four examples of electromagnetic waves are microwaves, radio waves, infrared waves, and visible light waves. Which of these waves has the MOST energy?
a)
Microwaves
b)
Radio waves
c)
Infrared waves
d)
Visible light waves
20.
An image of a distant object caused by refraction of light is called a ______
a)
Prism
b)
Mirage
c)
Rainbow
d)
Refracted medium
21.
The bending of light rays as they enter a new medium is called _____
a)
Diffuse reflection
b)
Regular reflection
c)
Refraction
d)
Diffraction
22.
How does the Sun transfer energy to Earth?
a)
By making Earth spin
b)
By making mechanical waves
c)
By electromagnetic waves
d)
By the Earth revolving around the sun
23.
In which medium does sound travel the fastest?
a)
Steel
b)
Air
c)
Water
d)
The speed is the same in all three mediums
24.
Visible light has a higher frequency than _____
a)
x-rays
b)
ultraviolet rays
c)
infrared rays
d)
gamma rays
25.
All of the following affect the speed of sound through different substances EXCEPT _______
a)
The color of the substances
b)
The temperature of the substance
c)
The compressibility of the substance
d)
The density of the substance
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.
a)
Energy flow from Joe's glass of ice tea to his hand holding the glass
b)
Energy flow from the cool water in the swimming pool to Joe's body
c)
Energy from the air inside of the air conditioned house to the pool deck
d)
Energy flow from Joe's body to the cool water of the swimming pool
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.
a)
Thermal energy flows from her hand to the ice cube
b)
Thermal energy flows from the ice cube to her hand
c)
Thermal energy flows back and forth between her hand and the ice cube
d)
Thermal energy does not flow between objects at different temperatures
28.
Which direction would the heat flow between these two objects? Ice cube and water
a)
From the ice cube to the water
b)
From the water to the ice cube
c)
Back and forth between the two
d)
Heat would not flow between these two objects
29.
What can cause a change of state in a system?
a)
Potential energy
b)
Nuclear energy
c)
Thermal energy
d)
Chemical energy
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?
a)
Nuclear
b)
Electromagnetic
c)
Chemical
d)
Kinetic
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?
a)
Some of the kinetic energy is converted into chemical energy
b)
Some of the kinetic energy is converted to heat due to friction
c)
Some of the potential energy is converted into electrical energy
d)
Some of the potential energy is converted into electricity due to friction
32.
Whenever energy is transferred _____
a)
Heat is released
b)
Potential energy increases
c)
Some energy is destroyed
d)
Temperature increased
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?
a)
chemcial to electrical to radiant and thermal
b)
mechanical to thermal
c)
thermal to mechanical
d)
chemical to mechanical and thermal
34.
Heat is the transfer of _____
a)
electromagnetic energy
b)
mechanical energy
c)
thermal energy
d)
nuclear energy
35.
David ate a cheeseburger at lunch. What kind of energy was in his cheeseburger?
a)
nuclear energy
b)
electrical energy
c)
electromagnetic energy
d)
chemical energy
36.
Which is an example of evidence that energy is neither created nor lost during a transformation?
a)
ice melts in the sun
b)
ice does not melt in the hot sun
c)
when a driver of car applies the car's brakes, friction heats the brakes
d)
if you drop a tennis ball, the tennis ball will never stop bouncing
37.
What happens when heat is added to gas in a sealed container?
a)
The particles of gas slow down
b)
The particles of gas speed up
c)
The motion of the particles does not change
d)
The particles of gas from a pile on the bottom of the container
38.
What can happen when enough heat is added to or removed from a system?
a)
The substances in a system will change state
b)
The system will break down
c)
The motion of the particles does not change
d)
The particles of gas form a pile on the bottom of the container
39.
The law of conservation of energy states that when one form of energy is transformed to another, __________,
a)
energy is destroyed in the process
b)
no energy is destroyed in the process
c)
energy is crated in the process
d)
some amount of energy cannot be accounted for
40.
In a hydroelectric plant the mechanical energy is moving water is transformed into ________
a)
nuclear energy
b)
electrical energy
c)
electromagnetic energy
d)
chemical energy
41.
Which statement describes the direction of heat flow?
a)
heart flows between two objects at the same temperture
b)
thermal energy can only be absorbed by cool objects
c)
heat flows from a warmer object to a cooler object
d)
heat flows from a cooler object to a warmer object
42.
The measure of the average kinetic energy of the individual particles in an object is called?
a)
thermal energy
b)
conduction
c)
convection
d)
temperature
43.
The total energy of all the particles in a substance is called _________
a)
temperature
b)
thermal energy
c)
degrees
d)
mass
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?
a)
conduction
b)
convection
c)
radiation
d)
specific heat
45.
As a car skids to a stop, friction transforms energy to _____.
a)
thermal energy
b)
nuclear energy
c)
chemical energy
d)
electrical energy
46.
Water bubbles through a hot spring at Yellowstone National Park. What method of heat transfer is this?
a)
conduction
b)
convection
c)
radiation
d)
specific heat
47.
Heat is transferred from one particle of matter to another within an object or between two objects in a process called _____
a)
conduction
b)
convection
c)
radiation
d)
insulation
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?
a)
the particles in the popsicle slow down and the shape changes.
b)
the particles in the popsicle speed up and the popsicle not longer has a definite shape.
c)
The particles in the popsicle stop moving.
d)
The popsicle's shape and volume remain the same
49.
Heated air moves from a space heater to the rest of a room in a process called _________
a)
Conduction
b)
Convection
c)
Radiation
d)
Insulation
50.
Which of the following statement is TRUE?
a)
The particles in an object at 40 degrees Celsius are moving slower than particles at 35 degrees Celsius
b)
The particles in an object at 45 degrees Celsius are moving slower than particles at 40 degrees Celsius
c)
The particles in an object at 40 degrees Celsius are moving faster than particles at 0 degree Celsius
d)
The particles in an object at 40 degrees Celsius are moving faster than particles at 100 degrees Celsius
51.
One way to reduce bias in an experiment is to
a)
ask only girls about a school topic
b)
take numerical measurements of results
c)
use descriptive phrases as your data
d)
make sure that the results come out the way you want them
52.
Which is an example of using ethics in experiments?
a)
Informing human subjects of possible risks before taking part in a scientific study
b)
A scientist changing his data from his experiment to match his hypothesis
c)
not testing medicine before it's sold to the public
d)
experimenting without considering the effects on the environment
53.
Observations that deal with descriptions that cannot be expressed in numbers is called _________
a)
manipulated observations
b)
quantitative observations
c)
qualitative observations
d)
responding observations
54.
Joe decides that cereal is the best breakfast because he thinks cereal tastes better than other breakfast foods. Joe is being ___________
a)
honest
b)
objective
c)
subjective
d)
ethical
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?
a)
water
b)
state of matter
c)
time
d)
boiling point of water
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?
a)
Accurate records explain how the hypothesis was formed
b)
Accurate records show why a hypothesis is not supported
c)
Accurate records allow others to repeat the experiment
d)
The records help other scientists save time by not repeating the experiment
57.
Scientist conduct multiple trials on their experiments because ______
a)
Their results are more likely to be reliable
b)
It costs less to run more trials than fewer trials
c)
Unusual occurrences are likely to be repeated every time
d)
Experiments always have the same results
58.
Botanists study plants. Chemists study matter and its interactions. Volcanologists study volcanoes. What similarity exists among scientists working in these fields?
a)
They all gather information to answer questions about the natural world.
b)
They all use the same tools in their work.
c)
They all do their research exactly the same way.
d)
No similarities exist among scientist working in different fields.
59.
A factor in an experiment that stays the same to make the experiment reliable is ______________
a)
the independent variable
b)
the dependent variable
c)
a control group
d)
a constant
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?
a)
The type of plant
b)
The amount of sunlight each plant recieves
c)
The amount of water received by each plant
d)
The amount of nutrients he gives each plant
61.
Scientists should _____ new ideas that they may not agree with.
a)
ignore
b)
laugh at
c)
listen and consider
d)
dismiss
62.
When scientists create a representation of a complex process, they are ___________
a)
inferring
b)
predicting
c)
classifying
d)
making models
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?
a)
The evidence will be dismissed as wrong.
b)
The evidence will be ignored.
c)
All current ideas about dinosaur extinction will be discarded.
d)
The current ideas about dinosaur extinction may be modified.
64.
What happens when similar investigation give different results?
a)
Scientists stop working on the problem.
b)
Further study is done to see if the differences are important.
c)
Scientist stop sharing data.
d)
The hypothesis is not true.
65.
_______can save time and money by testing ideas that would otherwise be difficult to test quickly or easily.
a)
biases
b)
conclusions
c)
models
d)
variables
66.
What are some tools used to collect and analyze scientific data?
a)
thermometer, pliers, drill, computer
b)
keyboard, computer, printer, scanner
c)
scissors, meter stick, calculator, stapler
d)
meter stick, balance, stopwatch, computer
67.
Why is the International System of Units important to science?
a)
It is easy to use, but not widely used
b)
It is widely used, and makes it easy to share data
c)
It makes it easy to protect data
d)
It is widely used, but it is not easy to use
68.
The metric basic unit of measure for the volume of liquid is ________
a)
Gram
b)
Meter
c)
Liter
d)
Celsius
69.
The metric basic unit of measurement for mass is _____
a)
Celsius
b)
Gram
c)
Meter
d)
Liter
70.
The metric basic unit of measurement for length is ______
a)
Gram
b)
Liter
c)
Meter
d)
Celsius
71.
Eugene wanted to determine how much volume of water was in the bowl. In order to determine the volume, what tool did he need to use?
a)
Meter stick
b)
Graduated cylinder
c)
Thermometer
d)
Triple beam balance
72.
Before starting a science activity, you should always, ________
a)
read all the instructions very carefully
b)
put on all your safety equipment
c)
ask your friend what to do
d)
get ready to do first aid
73.
Why is it important to obey safety rules?
a)
because your teacher says it's important
b)
to make you learn more about science
c)
to prevent accidents and to avoid or reduce injury if an accident does happen
d)
it is not important to obey safety rules, because they slow you down
74.
Hibiscus plants are flowering plants that thrive in Florida but are not known to survive where temperatures drop below freezing. The table below shows the average low temperatures in degrees Celsius of cities where Hibiscus plants are grown. Three of these cites have below freezing temperatures. How should a scientist react to this information?
a)
A scientist should disregard this information
b)
A scientist should believe that new information is true
c)
A scientist should decide that the new information is false
d)
A scientist should conduct additional research by using other sources.
75.
Sheila surveyed two eighth-grade classes to determine whether eighth-grade students like pizza, hamburgers, or tacos best. Her results are shown in the table below. What should Shelia do to ensure her results are reliable?
a)
She should publish her results
b)
She should repeat her survey in another class
c)
She should interview a local restaurant owner
d)
She should research food choices in the library
76.
Which of the following is a good way to analyze data?
a)
Organize it into charts and graphs, do calculations if necessary
b)
Check it over and then copy it
c)
Put it away for a few months to see if it makes more sense later
d)
Try to find some way to make it support your hypothesis
77.
You are investigating whether robins prefer one type of bird seed over any other type. Your independent variable is the type of bird seed used. What should your dependent variable be?
a)
The amount of bird seed in your feeder
b)
The size of the bird feeder
c)
The number of robins visiting your feeder
d)
The cost of the different types of bird seed
78.
Scientific knowledge changes with ___________
a)
new magazine articles
b)
careful reading of facts
c)
repeated experiments
d)
new evidence or new interpretations
79.
A well tested explanation for a wide range of observations or experimental results is called a scientific ________
a)
inquiry
b)
hypothesis
c)
theory
d)
law
80.
A statement that describes what scientists expect to happen every time under a particular set of conditions is a __________
a)
Scientific inquiry
b)
Scientific hypothesis
c)
Scientific theory
d)
Scientific Law
81.
Which of the following is an example of using a model?
a)
conducting a controlled experiment to investigate plant growth
b)
solving equations to calculate the path of a space probe
c)
observing gorillas in their natural habitat and recording their behavior
d)
drawing a network diagram to represent traffic flow
82.
Which of the following statements best describes a scientific law?
a)
It is the same as a scientific theory
b)
It describes an observed pattern in nature without attempting to explain it
c)
It is a statement that has been approved by the National Academy of Sciences
d)
It is widely accepted set of scientific hypothesis
83.
Why is it useful for scientists to develop models for the structure of atoms?
a)
Atoms are too small to study directly
b)
Atoms move too quickly to see
c)
Looking at atoms directly can be harmful
d)
Atoms are too far away to study
84.
Nearly 2000 years ago the astronomer, Ptolemy, believed that all objects in space, including the Sun, revolved around Earth. 500 years ago, Nicolaus Copernicus made observations showing that Earth and other planets revolved around the Sun, which refuted Ptolemy's argument. This is an example of how scientific knowledge _________________
a)
Always stays the same
b)
changes as a result of new evidence
c)
it communicated between scientists
d)
starts as a scientific theory and becomes a scientific law
85.
Which would be the most appropriate tool for modeling a complex system?
a)
a computer
b)
a calculator
c)
pencil and paper
d)
a simple equation
86.
Which of the following is an example of empirical evidence?
a)
An observation that the thermometer reads 25 degrees C
b)
An observation that driving is more fun than flying
c)
An observation that a room is cold
d)
An observation that the pool feels like bathwater
87.
Rachel Carson caused controversy with her research about the harmful effects of the pesticide DDT. Which group MOST LIKELY would have disagreed with her findings?
a)
Farmers
b)
Animal rights groups
c)
Bird Watchers
d)
Fishermen
88.
The statement, "Moonlight is caused by the Moon reflecting sunlight" is an example of a(n) ________
a)
Scientific Opinion
b)
Subjective explanation
c)
Historical fact
d)
Scientific explanation
89.
Asking the question, "Why does bread left on the kitchen counter eventually mold?" is an example of __________.
a)
using scientific inquiry
b)
analyzing data
c)
making a prediction
d)
collecting data
90.
Which of the following is NOT a way to gain scientific knowledge?
a)
Through experimentation
b)
Through an observational field study
c)
by making models
d)
by making assumptions
100 %
