Force/Motion
Force/Motion
Force/Motion
Water Cycle
Pollution
100

When sugar dissolves in water, the total mass of the solution will be -

A less than the mass of water and sugar separately.

B equal to the mass of water and sugar separately.

C more than the mass of water and sugar separately.

D dependent on how much you stir it.

B equal to the mass of water and sugar separately.

100

In a tug-of-war game, the red flag in the middle isn't moving. What does this tell us about the forces?  

A The forces are unequal, with one team pulling harder.

B The forces are equal and opposite.

C There are no forces being applied.

D Only one team is pulling.

B The forces are equal and opposite.

100

A trebuchet can launch an object a very far distance. When the rope is cut, the counter weight will be pulled towards the ground, causing the object on the other end of the trebuchet to launch.

A student designed an experiment to determine which type of ball would go the farthest using the trebuchet. The student used 3 types of balls and 3 counter weights, each with a different mass.

What should the student do to improve the experiment?

A Use the same type of ball for each trial

B Use the same counter weight for each trial

C Change the length of the rope for each trial

D Use balls with different size but the same mass for each trial

B Use the same counter weight for each trial

100

What causes water droplets to form on a cold glass on a hot day?

Condensation — water vapor cools and turns into liquid on the glass.

100

What is pollution?

Pollution happens when harmful materials get into the air, water, or land and make it dirty or unsafe.

200

When food coloring is added to water, what happens to its color intensity?

A The color becomes more intense.

B The color stays the same.

C The color becomes less intense and spreads out.

D The color completely disappears. 

C The color becomes less intense and spreads out.

200

Which scenarios show examples of equal forces?

Select TWO correct answers.

A A book falling to the ground

B Two people pushing a box from opposite sides with the same strength

C A car accelerating forward

D Two identical bricks on opposite sides of a standing board

B Two people pushing a box from opposite sides with the same strength

D Two identical bricks on opposite sides of a standing board

200

Picking up a heavy box is much more difficult than putting it down. What is a likely explanation for this?

A Pushing force is more difficult to accomplish than pulling force.

B The force of gravity acts against you when you try to push something to the ground.

C The action is less difficult because nothing is pulling the object toward the ground.

D The force of gravity is pulling the box toward the ground which makes the action of putting the box down easier to do.

D The force of gravity is pulling the box toward the ground which makes the action of putting the box down easier to do.

200

How does the Sun play a role in both evaporation and transpiration?

The Sun’s heat causes water to evaporate and also gives plants energy to release water through transpiration.

200

What kinds of pollutants might runoff carry into waterways after a storm?

Oil, fertilizer, pesticides, litter, and animal waste.


300

A student put a balloon on a triple beam balance before and after he blew up the balloon. What was he trying to prove?

A Air is made of gases and takes up space.

B Air is matter and has mass.

C The width of the balloon is greater after it is blown up.

D The mass of the balloon with air is the same as the mass of the balloon without air. 

B Air is matter and has mass.

300

What happens when unequal forces act on an object?  

A The object stays still.

B The object will change its motion: either by speeding up, slowing down, or changing direction.

C The object disappears.

D The object moves in the direction of the smaller force.

B The object will change its motion: either by speeding up, slowing down, or changing direction.

300

A student drew a maze on a piece of cardboard. He challenged another student to maneuver a paperclip successfully through the maze to the stack of papers by moving a magnet under the cardboard.

According to the information and image shown above, what force was the student demonstrating?

A The insulating property of cardboard

B The attractive force of magnetism

C The pulling force of gravity

D The resisting property of friction

B The attractive force of magnetism

300

When water runs off streets and sidewalks, where does it usually go?

It flows into storm drains, rivers, or lakes, and can eventually reach the ocean.

300

What causes air pollution?

Give at LEAST TWO examples!

Smoke from cars, factories, and fires puts harmful gases and particles into the air.

400

A student uses a spring scale to pull a 50-gram block horizontally across a wood desk. Then the student pulls the block the same distance across surfaces of carpet, sandpaper, and glass.

A How do blocks of different sizes react to force?

B How do different surfaces affect the amount of force needed to move a block?

C How do blocks affect spring scales?

D How does the mass of a block change when it is pulled across a desk?

B How do different surfaces affect the amount of force needed to move a block?

400

Which of the following situations demonstrate unbalanced forces?

Select TWO correct answers.

A Two students arm wrestling with neither winning

B A helicopter hovering in place

C A car rolling down a hill

D A bird gliding at a constant speed

C A car rolling down a hill

D A bird gliding at a constant speed

400

Two students designed an experiment to test the effects of force on an object. They stood on opposite sides of a large box and then they each applied a push to the box. The box moved to the right.

What can be said about the effect of the force being applied by the above student on the left?

A The force of magnetism was greater on the left so the box moved to the right.

B The pull of gravity was greater on the right so the box moved to the right.

C The pushing force was greater on the left so the box moved to the right.

D The force of friction was less on the left so the box moved to the right.

C The pushing force was greater on the left so the box moved to the right.

400

How are evaporation and transpiration alike

Both change liquid water into water vapor and move it into the air

400

Smoke from cars, factories, and fires puts harmful gases and particles into the air.

Rainwater and runoff can wash trash and chemicals into rivers and oceans.

500

Students drop the same heavy ball onto identical blocks of soft clay from different heights. For each height they measure the depth of the dent the ball makes in the clay.

A The size of the ball changes.

B The material of the ball changes.

C The mass of the ball when it hits the clay changes.

D The force of the ball when it hits the clay changes.

D The force of the ball when it hits the clay changes.

500

A group of students is conducting experiments in class. They have several supplies, including a toy car and different sized ramps. They want to design experiments to answer the following questions:

  • Does the height of a ramp affect the distance that a toy car will roll?
  • Will a toy car roll for a longer amount of time if the height of the ramp is increased?


Which scientific tools would be most helpful to conduct these experiments?

 

Select TWO correct answers.

A meterstick

B spring scale

C graduated cyclinder

D stopwatch

E balance scale

A meterstick

D stopwatch

500

A teacher did a demonstration for her class. She found the mass of a baseball and a crumpled piece of paper. She then held both at a height of 1 meter above the table top. She dropped both at the same time. The students wrote about the demonstration, shown on the journal pages in the illustration below.

According to the above information, which student has written a testable hypothesis?

A Allison

B Ben

C Christy

D David

A Allison

500

After rain falls on the land, what is it called when water flows over the ground into rivers and lakes?

Runoff

500

What could happen to the water cycle if the air is polluted with chemicals?

Polluted air can cause acid rain, which can damage plants, soil, and water sources.