Answers SY2025-26 - 2002040 MJ Comprehensive Science 1 Sem 1 CRCumulative Exam

Cumulative Exam Answers

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Which two characteristics are shared by all thunderstorms, tornados, and hurricanes?

clouds and wind

eyes and clouds

warm, dry air and wind

large waves and warm, dry air

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What is the kinetic energy of a toy truck with a mass of 0.75 kg and a velocity of 4 m/s? (Formula: )

3 J

6 J

12 J

24 J

A person is pushing a box across a table. The measured forces on the box are 10N, 14N, -7N, -10N.Which force is represented by -7N?

force of friction

normal force

force of gravity

push force

Which effect is most likely from a hurricane?

damaged homes due to flooding

forest fires due to lightning strikes

cars sucked in due to a low-pressure center

damaged personal property due to hail

Which statement describes friction?

It is perpendicular to the surfaces that rub together.

It causes a change in motion.

It occurs in the same direction as the push force.

It pulls downward on a moving object.

When does the Northern Hemisphere receive the fewest hours of daylight?

during the fall equinox

during the winter solstice

during the spring equinox

during the summer solstice

The field lines around one end of a bar magnet are shown below.

It is a south pole because the field lines spread out from this end.

It is a north pole because the field lines spread out from this end.

It is a south pole because the field lines enter the magnet at this end.

It is a north pole because the field lines enter the magnet at this end.

Which is one factor that contributes to the formation of polar, temperate, and tropical zones?

the angle of the Sun’s rays

the direction of seasonal winds

the presence of prevailing winds

the movement of wind near a mountain

A magnet placed against the wall of a metal shed falls to the ground, where it attracts a nail. What is the most likely explanation for this observation?

The wall is the opposite pole from the magnet.

The shed is not made of iron or steel.

The magnet is not magnetized.

The nail pulled the magnet to the ground.

How is an occluded front different from a cold front?

Warm air is pushed up during an occluded front, while cold air moves quickly during a cold front.

Occluded fronts cause warm air to feel dry, while cold fronts cause ground temperatures to feel cooler.

Warm air moves slowly during an occluded front, while cold air is cut off from the ground in a cold front.

Occluded fronts cause rapid changes in weather conditions, while cold fronts cause widespread cloud formation.

A weather forecaster describes the condition over Florida as having thunderstorms, rotating winds at 60 miles per hour, and heavy rain. Which natural hazard is happening?

a thunderstorm

a hurricane

a tropical cyclone

a flood

What is the potential energy of a 25 kg bicycle resting at the top of a hill 3 m high? (Formula: PE = mgh)

75 J

735 J

245 J

37.8 J

Luz, who is skydiving, is traveling at terminal velocity with her body parallel to the ground. She then changes her body position to feet first toward the ground. What happens to her motion?

She will continue to fall at the same terminal velocity because gravity has not changed.

She will slow down because the air resistance will increase and be greater than gravity.

She will speed up because air resistance will decrease and be less than gravity.

She will begin to fall in free fall because she will have no air resistance acting on her.

What electromagnetic wave can cause skin cancer?

red light

yellow light

infrared radiation

ultraviolet radiation

Study these images.Which image shows a cumulonimbus cloud?

The graph indicates Linda’s walk.

Linda started out moving, and then stopped moving after 6 seconds.

Linda started moving away from the start point, and then moved closer.

Linda never moved the entire trip.

Linda’s path results in a negative slope.

In addition to liquid precipitation, which are present when freezing rain occurs?

ice pellets

snowflakes

cold surfaces

warm temperatures

Kiley, Jermaine, and Gunther are playing tug-of-war. Kiley and Jermaine are on the same side of the rope, and Gunther is on the other side. Kiley is exerting a force of 20 N, and Jermaine is exerting a force of 25 N.

45 N in the opposite direction as Kiley and Jermaine

20 N in the opposite direction as Kiley and Jermaine

20 N in the same direction as Kiley and Jermaine

45 N in the same direction as Kiley and Jermaine

A probe is launched from Earth and lands on Mars. The gravitational acceleration on Mars is 3.7 m/s2.

The mass of the probe remains the same, but the weight of the probe increases.

The mass of the probe remains the same, but the weight of the probe decreases.

The mass of the probe increases, but the weight of the probe remains the same.

The mass of the probe decreases, but the weight of the probe remains the same.

Which term refers to the ability to do work?

energy

power

force

motion

Which statement best describes a characteristic of maritime polar air masses?

They occur mostly during the summer.

They form over water with cool, moist air.

They bring dense, heavy snow in the winter.

They have cool, dry air that forms over land.

On a test, Helena is defining energy. Which must she include in order to get her answer marked correct?

making objects more compact

the ability to do work

carrying through matter and space

the bonds of atoms

Gina and her friends postponed their trip to the movies because a thunderstorm was brewing. Gina helped her mother with the laundry, Christopher decided to follow the updates about the thunderstorm on his computer, Rodney took a shower, and Pablo read a book in his room.

Gina

Christopher

Rodney

Pablo

An object is moving east, and its velocity changes from 65 m/s to 25 m/s in 10 seconds. Which describes the acceleration?

negative acceleration of 4 m/s2

positive acceleration of 4 m/s2

positive acceleration of 9 m/s2

negative acceleration of 9 m/s2

Mining is a factor that affects the shape of Florida. Which two products contain materials that are mined in the state?

pencils and rock salt

rock salt and bricks

bricks and plastics

plastics and pencils

Which is an example of negative acceleration?

a snowboarder who increases speed when traveling downhill

a biker who maintains a constant speed through a race

a skateboarder who reduces speed when moving up a hill

a runner who fluctuates speed by increasing and decreasing speed

Question text not available

The forces are balanced.

The box will move to the right.

The box will move to the left.

The forces are unbalanced.

Assuming the bull’s eye is the accepted value, which diagram shows results that are accurate and precise?

Option

Kenneth ran a marathon (26.2 miles) in 5.5 hours. What was Kenneth’s average speed? (Round your answer to the nearest tenth.)

0.2 mph

4.8 mph

5.5 mph

144.1 mph

Sudhi is studying the motion of a toy car. She places the car in the middle of a ramp and releases it.Which best describes the reference point in this scenario?

the top of the ramp

the bottom of the ramp

the ending position of the car

the starting position of the car

Note the locations of Kansas, Florida, Brazil, Bolivia, and Uruguay on the map.

Bolivia

Brazil

Kansas

Uruguay

Where does the energy within the greenhouse effect originate?

from convection within the atmosphere

from the circular movement of hot and cold air

from solar radiation entering the atmosphere

from the conduction of heat from the ground to the air

Two objects are held close together. When they are released, they move toward one another. Which conclusion is supported by this evidence?

The objects are both positively charged.

The objects are both negatively charged.

The objects have no charge.

The objects have opposite charges.

Which is an example of a local wind?

a windchill

a jet stream

a trade wind

a sea breeze

The cryosphere is part of which sphere of the Earth system?

atmosphere

biosphere

geosphere

hydrosphere

What is 5.27 × 10–4 written in standard form?

0.00527

0.000527

5,270

52,700

Which two layers are part of the thermosphere?

exosphere and ionosphere

ionosphere and mesosphere

mesosphere and stratosphere

stratosphere and troposphere

When a volcano erupts, tiny particles from which of Earth’s spheres are released into the air?

atmosphere

biosphere

geosphere

hydrosphere

Which factor increases as a result of increasing altitude?

air pressure

air density

size of gas molecules

space between gas molecules

Study the image.

Which change will decrease the electric force between two positively charged objects?

moving them closer together

moving them farther apart

adding neutrons

removing electrons

The diagram shows a toy car on a number line.

–4

Which is a type of heat transfer that causes the air at the top floor of a building to be hotter than the air at the bottom floor of a building?

conduction

convection

radiation

reflection

Which part of a thunderstorm is the most threatening?

thunder

wind

rain

lightning

The table contains errors.

saltwater intrusion and sinkholes

mining and coastal erosion

saltwater intrusion and mining

sinkholes and coastal erosion

Jena is reading about factors that affect Florida’s climate. One sentence reads: Most of Florida is less than 100 feet above sea level.Which factor is she reading about?

elevation

latitude

ocean currents

proximity to large bodies of water

Shondra takes notes in class.

Switch "the energy of moving objects" and "the ability to do work" and place chemical energy under "Forms of energy."

Switch "the energy of flowing electrical charges" and "the energy in a spring" and place kinetic energy under "Forms of energy."

Switch "the energy in the nuclei of atoms" and "the energy stored in objects'" and place nuclear energy under "Main categories of energy."

Switch "the energy from the Sun" and "the energy of a rock on a hill" and place electrical energy under "Main categories of energy."

How does latitude affect climate?

Latitude controls the angle of tilt for Earth’s axis.

Latitude determines the duration of daylight hours.

Latitude causes air temperatures to remain cool at higher elevations.

Latitude causes ocean currents to move in a certain direction.

Johanna is studying what happens to the energy as a ball rolls down a ramp. What is one form of energy that she is studying?

gravitational potential energy

electrical energy

chemical energy

elastic potential energy

Which characteristic describes the troposphere?

contains the ozone layer

has the highest air pressure

spans 12–50 km above Earth

is a good place for planes to fly

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