Human Body Systems
Which system helps regulate body temperature by sweating?
A. Muscular
B. Nervous
C. skin
D. Skeletal
Correct: Skin
Which particle arrangement is correct for a solid?
A. Particles far apart, moving fast
B. Particles loosely packed, sliding past each other
C. Tightly packed and vibrating
D. Randomly spaced and stationary
C. Tightly packed and vibrating
Which force keeps the Moon in orbit around Earth?
A. Friction
B. Air pressure
C. Magnetism
D. Gravity
D. Gravity
Which tool combination gives you wind direction and wind speed?
A. Anemometer and barometer
B. Wind vane and anemometer
C. Thermometer and hygrometer
D. Rain gauge and thermometer
B. Wind vane and anemometer
Which of the following helps reduce landfill waste?
A. Buying more plastic
B. Recycling and composting
C. Using paper plates
D. Driving more cars
B. Recycling and composting
If a person has damaged nerves in their leg, which systems will be affected?
A. Circulatory and Respiratory
B. Nervous and Muscular
C. Skeletal and Digestive
D. Excretory and Nervous
B. Nervous and Muscular
Why is dissolving salt in water a physical change and not a chemical one?
A. It forms a new substance
B. It cannot be reversed
C. The salt keeps its identity
D. It burns the salt
C. The salt keeps its identity
What happens to friction when two rough surfaces rub together?
A. It decreases
B. It becomes zero
C. It increases
D. It stays the same
C. It increases
How does the sun affect the water cycle?
A. It cools the clouds
B. It powers condensation
C. It provides energy for evaporation
D. It stops precipitation
C. It provides energy for evaporation
If a factory dumps waste into a river, which systems are MOST affected?
A. Human digestive and nervous
B. Animal nervous and muscular
C. Aquatic ecosystems and human health
D. Soil erosion and mountains
C. Aquatic ecosystems and human health
Why is the circulatory system considered a “transport system”?
A. It removes bones from muscles
B. It carries oxygen, nutrients, and waste
C. It helps digest food
D. It transports electrical signals
B. It carries oxygen, nutrients, and waste
When ice melts and then refreezes, this is an example of:
A. Two chemical changes
B. One physical and one chemical change
C. Two reversible physical changes
D. A change in mass
C. Two reversible physical changes
Why does using a longer ramp (inclined plane) make it easier to move a heavy object?
A. It makes the object lighter
B. It uses more friction
C. It spreads the force over a longer distance
D. It eliminates all effort
C. It spreads the force over a longer distance
What causes the change of seasons on Earth?
A. The Moon’s orbit
B. Earth’s tilt and revolution around the Sun
C. Air pressure changes
D. Ocean tides
B. Earth’s tilt and revolution around the Sun
Which human activity is most responsible for increasing air pollution and contributing to climate change?
A. Planting trees in urban parks
B. Using wind turbines to produce energy
C. Driving gasoline-powered vehicles daily
D. Riding bicycles on city trails
C. Driving gasoline-powered vehicles daily
Which two systems are MOST involved when you're startled by a loud sound?
A. Muscular and Skeletal
B. Nervous and Muscular
C. Digestive and Circulatory
D. Respiratory and Excretory
B. Nervous and Muscular
How does heating a substance affect its particles?
A. Particles disappear
B. Particles move slower and clump
C. Particles gain energy and move faster
D. They become more dense and stop moving
C. Particles gain energy and move faster
Which of these would require the least effort to lift a heavy load?
A. Pulley with one rope
B. Lever with a short arm
C. Inclined plane at a steep angle
D. Pulley with multiple supporting ropes
D. Pulley with multiple supporting ropes
Which weather pattern results when cold and warm air meet?
A. Clear skies
B. Tornadoes
C. Fronts and storms
D. Heat waves
C. Fronts and storms
Which option describes the MOST environmentally responsible way to deal with an old broken plastic chair?
A. Throw it in the garbage
B. Burn it in a backyard fire pit
C. Leave it outdoors to break down over time
D. Recycle the plastic or repurpose it into something new
D. Recycle the plastic or repurpose it into something new
If your kidneys stop working, what happens to your body?
A. You stop breathing
B. Waste builds up in your blood
C. Bones break easily
D. Your muscles shrink
B. Waste builds up in your blood
Which of the following best represents an irreversible change due to a chemical reaction that results in the formation of a new substance with different properties?
A. Water turning into steam when heated
B. Butter softening when left out at room temperature
C. Juice freezing into ice cubes
D. Iron reacting with oxygen to form rust over time
D. Iron reacting with oxygen to form rust over time
How does a screw function as a simple machine?
A. It lowers friction
B. It turns circular motion into upward force
C. It multiplies distance
D. It pulls objects using magnetism
B. It turns circular motion into upward force
Which scenario BEST explains how unequal heating of Earth’s surface by the Sun leads to global weather patterns?
A. The Moon’s gravity pulls air and causes storms.
B. Cold air moves upward and creates high-pressure systems near the equator.
C. Warm air near the equator rises, and cooler air moves in to replace it, creating wind currents.
D. Rain falls more at the poles because the Sun’s rays are stronger there.
C. Warm air near the equator rises, and cooler air moves in to replace it, creating wind currents.
Why are solar panels considered a more sustainable energy source than burning fossil fuels?
A. They use more land but cost less money
B. They create more electricity by burning cleaner gases
C. They convert renewable energy without releasing harmful gases
D. They only work at night and help save sunlight for daytime
C. They convert renewable energy without releasing harmful gases