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Worksheets7th Grade Science NCFE Review
Total questions: 99
Worksheet time: 1hrs 9mins
Which molecule in the atmosphere is responsible for blocking harmful UV radiation from the sun?
ozone
methane
carbon dioxide
nitrogen
What is the relationship between altitude and air density (pressure) within Earth's atmosphere?
As altitude increases, air density (pressure) decreases.
As altitude increases, air density (pressure) increases.
As altitude increases, air density (pressure) remains the same.
There is no relationship between altitude and air density (pressure) within Earth's atmosphere.
List the layers of Earth's atmosphere in order of increasing altitude.
exosphere, thermosphere, mesosphere, stratosphere, troposphere
troposphere, stratosphere, mesosphere, thermosphere, exosphere
troposphere, stratosphere, ozone layer, mesosphere, thermosphere, exosphere
Which of the following is a valid example of how the greenhouse effect works in the atmosphere?
The temperature inside a car with the windows closed on a hot summer day is higher than the outside temperatures.
The release of greenhouse gases through the burning of fossil fuels causes global temperatures to rise.
A refrigerator feels warm on the outside but cool on the inside.
Which term is a measure of the amount of moisture in the air?
precipitation
humidity
heat
pressure
A boundary between two air masses with different temperature and moisture characteristics is...
a cyclone
front
temperature inversion
anticyclone
What is the effect of the unequal heating of Earth's surface?
wind
ocean tides
the greenhouse effect
the coriolis effect
What device is used to tell if the air pressure decreases during a storm?
thermometer
barometer
anemometer
hygrometer
Isobars are lines on a weather map that connect points of equal _______.
air pressure
temperature
winds
humidity
As a front passes through your area, thunderstorms occur, winds shift from southeast to northwest, and the temperature changes from 85 to 65 degrees F. What kind of front was this?
cold front
warm front
stationary front
occluded front
Which of the following is a valid method for reducing the amount of greenhouse gases in the atmosphere?
Reduce the use of chemicals that destroy ozone in the stratosphere.
Decrease the use of alternative fuel sources such as solar energy.
Decrease the amount of fossil fuels burned by cars.
Decrease the amount of acid rain in the sky by altering cloud patterns.
All animal and plant cells are surrounded by a thin:
nucleus
vacuole
cell membrane
cell wall
Why would the offspring resulting from fertilization have more differences than the offspring resulting from budding?
Two parents provide all of their genes to the offspring during budding, unlike fertilization
Each parent provides half of its genes to it s offspring during budding, unlike fertilization
Two parents provide all of their genes to their offspring during fertilization, unlike during budding.
Each parent provides half of its genes to its offspring during fertilization, unlike during budding.
Asexual reproduction is used to do all but one of the following. Which one is it?
grow
produce gametes
make new organisms
replace old or damaged parts
An advantage of sexual reproduction over asexual reproduction is that sexual reproduction:
decreases diversity within the species.
increases diversity within the species.
produces offspring that are genetically identical to the parents.
produces offspring with more genes than the parents.
Which of these best describes sexual reproduction?
Sexual reproduction requires a male and female of the same species to produce offspring.
Sexual reproduction requires a male and a female of different species to produce offspring.
Sexual reproduction requires two males or two females of the same species to produce offspring.
Sexual reproduction requires two males or two females of different species to produce offspring.
In asexual reproduction, the offspring:
have half the genes of the parent.
have twice the genes of the parent.
have different genes from the parent.
have the same genes as the parent.
Which most likely refers to the genotype of a pea plant?
Tall
Short
Purple
TT
How many chromosomes are in a average human sex cell (gamete)?
46
23
12
24
What is one problem that can develop as a result of poor diet and lack of exercise?
genetic disease
cancer
heart disease
addiction
On a pedigree chart, a circle that is filled in means…
female, affected
female, unaffected
male, affected
male, unaffected
If a purebred tall plant (TT) and a purebred short plant (tt) are crossed, what will be the outcome of the F1 generation?
100% Purbred Short (tt)
75% Tall (Tt) and 25% Short (tt)
100% Tall (Tt)
What gases are exchanged in the respiratory system?
Carbon dioxide and water
Oxygen and Carbon Monoxide
Carbon Dioxide and Oxygen
Carbon Monoxide and water
Which body system protects some of the internal organs, such as the heart and lungs, from physical injury?
muscular
skeletal
digestive
nervous
The esophagus, stomach, small and large intestines, gall bladder, pancreas, and liver are all a part of which body system?
endocrine
integumatory
digestive
urinary
Which two systems work together to remove carbon dioxide waste and bring oxygen to blood?
digestive and excretory
circulatory and digestive
respiratory and excretory
circulatory and respiratory
Which are systems of the human body?
lungs, heart, and brain
arteries, blood, and heart
vision, hearing, and taste
respiratory, circulatory, and reproductive
Being outside in extremely cold temperatures can upset the body’s temperature regulation. What is one result of the body trying to regain homeostasis?
shivering
hot, red skin
decreased breathing rate
What happened to the motion of the object between
t = 50 s and t = 70 s?
The object increased its speed.
The object decreased its speed.
The object stopped moving.
The object changed directions.
John wants to build a racetrack that will allow his toy cars to travel fast when force is applied. Which material should he use?
carpet, because friction will be high
gravel, because friction will be high
plastic, because friction will be low
sandpaper, because friction will be low
A magnet is placed near a pile of steel paper clips. Which will most likely occur?
The magnet will provide a balanced force, causing the paper clips to spin in circles.
The magnet will provide an unbalanced force, keeping the paper clips stationery.
The magnet will provide a balanced force, pushing the paper clips away from it.
The magnet will provide an unbalanced force, pulling the paper clips toward it.
Which form of energy does a car’s engine convert into mechanical energy?
light
wind
chemical
gravitational
Which of the following has the most inertia?
A 90 kg wrestler sitting on a mat
A 50 kg student running with a velocity of 5m/s
A 2 kg baseball in free fall
A 7 kg bowling ball rolling at a velocity of 4 m/s
What will happen to the gravitational potential energy of a rock as it moves down a hill during a landslide?
It will decrease.
It will increase.
It will not change.
When riding a roller coaster, you go up and down many hills. As you get to the top of a roller coaster, what energy change is taking place?
potential energy is changed to kinetic energy
kinetic energy is changed to potential energy
chemical energy is changed into heat energy
heat energy is changed into chemical energy
Which two organisms contain chloroplasts and eyespots
amoeba and paramecium
paramecium and volvox
volvox and euglena
euglena and amoeba
How do a paramecium and an amoeba obtain food to live?
a paramecium and an amoeba both use contractile vacuoles to capture food
a paramecium and an amoeba both make their own food through photosynthesis
A paramecium collects food into an oral groove, while an amoeba uses pseudopods to surround their food
A paramecium pseudopods, while an amoeba uses chloroplasts to make its food
How can simple machines make work easier?
by decreasing the force needed to complete the task
by increasing the friction between the machine and the object
by adding more work on the object than originally applied
by removing the force of gravity on the object
7.P.1.3 The graph below shows the relationship between the distance an object moves and the time it travels. What can be concluded from the graph?
The object is accelerating.
The object is slowing down.
The object is not moving.
The object is moving in a straight line.
7.P.1.1 A dog runs for 2 seconds without stopping. After 1 second, the dog travels 6 meters. By the end of the next second, the dog has traveled an additional 4 meters. Which best describes the motion of the dog during the two seconds?
The dog slows down.
The dog speeds up.
The dog moves with a constant speed.
The dog changes directions.
7.P.1.2 Which best describes how forces must interact for a kite to sail up into the air?
The force of gravity must be equal to the force of the wind.
The force of gravity must be greater than the force of the wind.
The force of the wind must be greater than the force of gravity.
The force of the person flying the kite must be equal to the force of the wind.
7.P.1.4 The graph below shows the distance traveled during a time interval. What is the speed of the object?
0 meters/sec
1 meters/sec
2 meters/sec
8 meters/sec
7.P.2.1 If the motion of an object increased, which type of mechanical energy was gained by the object?
chemical energy
gravitational potential energy
kinetic energy
electromagnetic energy
7.P.2.2 The diagram below shows a mass suspended on a string called a pendulum. What energy transformation occurs as the mass moves from point A to B?
Kinetic energy is converted to potential energy.
Potential energy is converted to Kinetic energy.
Chemical energy is converted to electromagnetic energy.
Gravitational energy is converted to chemical energy.
7.P.2.4 Simple Machine 1 is determined to have a greater mechanical advantage than Simple Machine 2 when moving an object. What can be concluded from this statement?
Simple Machine 1 can move the object further than Simple Machine 2 can.
Simple Machine 1 can lift heavier objects than can Simple Machine 2.
Simple Machine 1 uses more force to move the object than does Simple Machine 2.
Simple Machine 1 uses less force to move the object than does Simple Machine 2.
7.E.1.1 Why is the Mesosphere colder than the Troposphere?
Because the Mesosphere is closer to the ground.
Because the Mesosphere contains ozone.
Because the molecules in the Mesosphere are spaced farther apart.
Because the molecules in the Troposphere are spaced farther apart.
7.E.1.6 Why would the Environmental Protection Agency seek to monitor atmospheric pollution and air quality?
to make sure the air pressure remains constant over time
to make it rain in drought affected areas
to maintain the respiratory health of humans
to reduce the amount of oxygen released by the rainforests
7.L.1.2 How do materials move in and out of plant cells and animals cells?
Plant cells and animal cells have cilia.
Plant cells and animal cells have a cell wall.
Plant cells and animal cells have a flagella.
Plant cells and animal cells have a cell membrane.
7.L.1.3 Which of the following is organized from simplest to most complex?
cells->organs->organ systems->tissues->the organism
cells->tissues->organs->organ systems->the organism
the organism->organ systems->organs->tissues->cells
tissues->cells->organs->organ systems->the organism
7.L.1.4 How do the lungs function within the excretory system?
the lungs exchange oxygen and carbon monoxide
the lungs absorb carbon dioxide from the air
the lungs help to release carbon dioxide while absorbing nutrients
the lungs exchange oxygen and carbon dioxide and release waste products in cells.
7.L.2.1 Which best explains why sexual reproduction produces greater variations in the offspring?
The DNA comes from two genetically different parents.
The DNA comes from one parent that is genetically identical.
The sex cells are produced by mitosis.
The sex cells undergo self fertilization
In the punnett square below, what belongs in the missing square
b = blue eyes
What is true about these two brothers that have brown eyes?
One has genotype BB the other Bb.
(hint: check your notes - "modes of inheritance")
