Changes in Rigid and Soft Objects Caused by Force 2

What material is usually soft?

• wood

• metal

• sponge

• stone

What happens to a soft object when forces are applied?

• It dances.

• It changes shape.

• It enlarges.

• It shrinks.

Evaluating the materials used in construction, why is understanding the forces acting on buildings important?

• to ensure buildings can withstand forces like earthquakes and wind

• to make buildings look more attractive

• to reduce the cost of construction

• to make construction faster

What is deformation?

• a dance move

• a change in shape

• a type of food

• a song

What does it mean when a material is described as “rigid"?

• It can easily be stretched.

• It resists changes in shape when a force is applied.

• It is very soft and flexible.

• It can absorb a lot of water.

What happens when you apply force to a ball rolling in

the opposite direction?

• It speeds up.

• It slows down.

• It changes color.

• It becomes soft.

7. How does force affect the motion of an object?

• It changes the object's color.

• It has no effect on the object.

• It can change the object's speed or direction.

• It makes the object lighter.

What determines the best material to use for a bike helmet?

• color of the material

• material's ability to resist forces without breaking

• smell of the material

• weight of the material

Why is rigidity important in construction?

• It makes the structure edible.

• It makes the structure more stable.

• It makes the structure colorful.

• It makes the structure smell nice.

What characteristic allows a rubber band to be stretched?

• rigidity

• colorfulness

• softness

• taste