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WorksheetsNC 7th Grade Science NCFE
Total questions: 35
Worksheet time: 35mins
Which layer of the atmosphere contains the most water vapor?
troposphere
stratosphere
mesosphere
exosphere
Which is the most likely cause of tropical storms?
Water runoff from the land fuels storm clouds
High-pressure air causes storm clouds to form
Sea breezes close to shore push storm clouds together
Warm water evaporates, rises quickly, and interacts with a colder air mass
Over a period of several hours, a barometer shows rapidly decreasing air pressure. What type of weather will most likely occur next?
clear, sunny weather
rainy weather for days
cloudy, stormy weather
calm, windless weather
What causes convection currents to occur on Earth?
cool air rising, warm air sinking
cool air rising, warm air rising
warm air rising, cool air sinking
warm air sinking, cool air sinking
Why are scientists concerned with ozone depletion in the upper atmosphere?
because it causes greater levels of ground-level ozone
because it allows ultraviolet radiation to reach Earth’s surface
because it increases the amount of smog in highly populated cities
because it decreases global temperatures by decreasing incoming solar radiation
How does the arrangement of the air molecules found in the troposphere compare to the arrangement of those found in the thermosphere?
The air molecules are closer together in the troposphere and are farther apart in the thermosphere.
The air molecules are farther apart in the troposphere and are closer together in the thermosphere.
The number of air molecules is the same in the troposphere as in the thermosphere.
There are fewer air molecules in the troposphere than in the thermosphere.
Why do thunderstorms most often occur in the summer months?
The air pressure is higher in the summer months.
Increases in sunlight cause air molecules to contract.
The jet stream forces air upward during the summer months.
Higher temperatures increase the rate of evaporation and convection.
What type of weather is most likely observed in an area when cirrus clouds are present?
rainy weather
calm weather
foggy weather
stormy weather
Earth’s atmosphere is mainly composed of which gases?
hydrogen, helium, oxygen, and argon
nitrogen, oxygen, argon, and carbon dioxide
nitrogen, hydrogen, argon, and carbon dioxide
helium, hydrogen, oxygen, and carbon dioxide
In which way are a euglena and a volvox different?
A euglena is an individual cell, while a volvox is a colony of cells.
A euglena uses cilia to move, while a volvox uses flagella to move.
A euglena can make its own food, while a volvox must capture its food.
A euglena only reproduces sexually, while a volvox only reproduces asexually.
Which function does the nucleus of a cell perform?
It releases energy for the cell.
It provides structure for the cell.
It controls the activity of the cell
It forms the boundary of the cell
Which best explains why muscle is considered a tissue?
It is connected to bones
It can move voluntarily or involuntarily
It interacts with several organ systems
It is a group of cells working together
What is one way the respiratory system and the circulatory system work together in the human body?
The circulatory system takes in nutrients, while the respiratory system delivers oxygen.
The circulatory system takes in water, and the respiratory system takes in carbon dioxide.
The respiratory system takes in nutrients, while the circulatory system delivers carbon dioxide to the cells of the body
The respiratory system takes in oxygen, and the circulatory system delivers the oxygen to the cells of the body.
How do a volvox and an amoeba get their food?
A volvox uses eyespots, and an amoeba uses cilia to find food.
A volvox uses photosynthesis, and an amoeba surrounds its food using pseudopods.
A volvox surrounds its food, and an amoeba uses cilia to find food.
A volvox uses pseudopods to find food, and an amoeba uses photosynthesis.
Which statement describes the organization of living organisms?
All organisms are composed of many cells, which are the basic units of structure but do not perform life functions.
All organisms are composed of one or more cells, which are the basic units of structure and perform essential life functions.
All organisms are composed of many cells that have basic units with unique structures and functions.
All organisms are composed of one or more cells with the same shape and purpose but are not the basic units of structure.
How do the digestive system and the circulatory system work together in the human body?
The digestive system sends electric messages, while the circulatory system responds to the messages.
The digestive system provides structure for the body, while the circulatory system directs the movement.
The digestive system removes liquid toxins from the body, while the circulatory system removes solid waste.
The digestive system extracts nutrients from food, while the circulatory system transports those nutrients.
How is a gamete different from other types of cells in a person’s body?
It has no chromosomes.
It has half the number of chromosomes
It has twice the number of chromosomes
It has four times the number of chromosomes.
A homozygous dominant black angelfish (BB) is crossed with a homozygous recessive gold angelfish (bb). What is the probability their offspring will be gold?
0%
25%
75%
100%
Person X and person Y both smoked the same brand and amount of cigarettes for 20 years. Person Y develops lung disease while person X does not. Which statement best compares both people?
The genetic makeup of person X allowed for a higher tolerance to chemicals in tobacco than person Y.
Person X is a woman and thus more likely to develop lung disease.
The genetic makeup of person X allowed for a lower tolerance to chemicals in tobacco than person Y.
Person X is a man and thus more likely to develop lung disease.
The offspring of many species of amoeba are genetically identical to their parent, while the offspring of most mammal species are genetically different from their parents. Which most likely explains the genetic differences in the offspring of amoebas and mammals?
Amoebas reproduce asexually, but mammals reproduce sexually.
Amoebas reproduce sexually, but mammals reproduce asexually.
Amoebas reproduce more slowly than mammals.
Amoebas reproduce faster than mammals.
A Punnett square without the genotypes of the parents is shown below. What are the genotypes of the parents?
Cc, cc
CC, cc
Cc, Cc
CC, Cc
How do people determine if a vehicle in which they are sitting is moving?
by comparing their position to a fixed object inside the vehicle
by comparing their position to a fixed object outside the vehicle
by comparing their position to a moving object inside the vehicle
by comparing their position to a moving object outside the vehicle
Two students pull on a rope in opposite directions, each with a force of 100 N. What would most likely happen to the rope if the student on the left increased her force to 125 N?
The rope would decrease its acceleration to the left.
The rope would decrease its acceleration to the right.
The rope would go from motionless to accelerating to the left.
The rope would go from accelerating to the right to accelerating to the left.
The graph below shows John’s trip to school. Which points on the graph show John returning home because he forgot his book bag?
between points I and II
between points II and III
between points III and IV
between points IV and V
The graphs below show the motion of four different objects. Which graphs show a point where the objects were motionless over a period of time?
Graph 1 and Graph 2
Graph 3 and Graph 4
Graph 1 and Graph 3
Graph 2 and Graph 4
The diagram below shows four different objects that all start at the same place and move along the same path. Which best describes the motion of these objects?
Both Objects 2 and 3 are at a higher elevation than Object 1.
Both Objects 1 and 2 are at a lower elevation than Object 4.
Object 4 has traveled farther than the other objects.
Object 1 has traveled farther than the other objects.
Which applied force will cause a glass of water sitting on a countertop to move?
a balanced force
a frictional force
a gravitational force
an unbalanced force
Which will cause an increase in the mechanical energy of an object?
decreasing its kinetic energy
increasing its electrical energy
increasing its potential energy
decreasing its gravitational energy
The diagram below shows the path of a marble. At which position does the marble have the most kinetic energy?
1
2
3
4
A person enters a room, flips the light switch, and a lamp turns on. What causes the lamp to turn on?
The circuit is open, and flipping the switch closes the circuit.
The circuit is closed, and flipping the switch opens the circuit.
The wires are connected, and flipping the switch disconnects the wires.
The wires are connected, and flipping the switch disconnects the lamp.
This is a diagram of four simple machines. Which simple machine would most likely be used to move an object over great distances and on a flat surface?
R
S
T
U
How does the mechanical energy of a rock change as it falls from a mountain?
The mechanical energy remains the same because kinetic energy is changed into potential energy.
The mechanical energy remains the same because potential energy is changed into kinetic energy.
The mechanical energy increases because the kinetic energy is changed into speed, while the potential energy remains the same.
The mechanical energy increases because the potential energy is changed into acceleration, while the kinetic energy remains the same.
The diagram below shows the path of an object. The object is placed on point S and released toward point X. At which point will the object have the same amount of potential energy as it does when it is at point S?
T
U
V
X
How does a wind turbine produce electricity?
It releases kinetic energy to the wind.
It releases potential energy to the wind.
It converts the wind’s kinetic energy to mechanical energy.
It converts the wind’s potential energy to mechanical energy.
The diagram below shows the motion of a ball while being dropped. What happens to the energy of the ball from when t = 0 s to when t = 5 s?
Potential energy decreases and kinetic energy increases, but the total amount of mechanical energy remains the same
Potential energy increases and kinetic energy decreases, but the total amount of mechanical energy remains the same.
Potential energy and kinetic energy both increase, and the total amount of mechanical energy increases.
Potential energy and kinetic energy both decrease, and the total amount of mechanical energy decreases.
