Why does increasing the thickness of protective materials help reduce peak forces?

c. It extends the collision time

a. It makes the material stronger

b. It increases the material's weight

d. It makes the material more brittle

What happens to energy when objects slide against each other due to friction?

b. Energy transfers into heat/temperature increase

a. Energy disappears completely

c. Energy remains constant in the objects

How can force be distributed to reduce damage during impact?

d. By spreading force over a larger area

a. By concentrating force on a single point

b. By using only rigid materials

What happens to energy when friction occurs between two surfaces?

c. Temperature increases due to particle movement

a. Energy disappears completely

b. Energy transforms into sound only

5. Which statement about protective devices is true?

c. They reduce force equally on both objects

a. They all work in completely different ways

b. They only protect one object in a collision

d. They only work at high speeds

In what direction does friction act on a moving object?

c. Opposite to the direction of motion

a. In the same direction as motion

How does mass affect the force needed to speed up an object?

c. More mass requires more force

a. Mass has no effect on required force

b. Less mass requires more force

d. Force and mass are unrelated

What is the relationship between an object's kinetic energy and collision damage?

d. More kinetic energy causes more damage

a. More kinetic energy causes less damage

b. Kinetic energy doesn't affect damage

c. Damage is random regardless of energy

How does kinetic energy relate to stopping an object in motion?

c. More kinetic energy requires more force to stop

a. Less kinetic energy requires more force to stop

b. Kinetic energy doesn't affect stopping force

d. Stopping force is unrelated to motion

How does air resistance affect energy transfer?

b. It transfers energy between objects and air particles

a. It has no effect on energy transfer

c. It only affects objects at rest

What is the mathematical relationship between kinetic energy and speed?

d. Kinetic energy is proportional to speed squared

b. Kinetic energy is inversely related to speed

c. Speed has no effect on kinetic energy

Which statement about force and acceleration is correct?

d. More force causes more acceleration

a. Force and acceleration are unrelated

b. More force causes less acceleration

c. Force has no effect on speed

What makes certain materials better at protecting objects during impact?

a. Their ability to deform under force

How does air resistance affect a moving object?

d. It opposes the object's motion

a. It increases the object's speed

b. It applies a force in the direction of motion

c. It has no effect on the object

What happens when protective materials deform during impact?

b. They absorb energy from the collision

a. They become permanently damaged

c. They increase the peak force

What role does surface roughness play in friction?

b. It creates bumps that interact and resist motion

a. It reduces friction completely

c. It has no effect on friction

d. It only affects smooth surfaces

What happens to an object's kinetic energy when its speed is doubled?

c. It becomes four times greater

In a collision between two objects, how do the forces compare?

b. The forces are equal but in opposite directions

a. The larger object exerts more force

c. The faster object exerts more force

d. The heavier object experiences less force

What happens when objects with higher kinetic energy collide?

d. They produce higher peak forces

a. They produce lower peak forces

b. They maintain constant speed

c. They experience no deformation

Which statement about collisions is TRUE?

b. The peak forces are equal for both objects

a. Larger objects always apply more force

c. Slower objects apply more force

d. Forces are only equal if masses are equal

What happens to all solid objects when they experience a collision or contact force?

d. They maintain their exact shape

During a collision between two objects, which statement is ALWAYS true?

c. The objects make physical contact

a. Both objects are permanently damaged

b. The objects never change direction

d. Only one object experiences force

When two objects collide, what is NOT necessarily true?

a. Forces act between the objects

Which statement best describes the forces in a collision?

d. Forces exist between both objects

a. Forces only affect the larger object

b. Forces disappear immediately after contact

c. Forces act in only one direction

7th Grade 1st Semester Final Exam Review

Quiz

•

Science

•

7th Grade

•

Practice Problem

•

Medium

•

NGSS

MS-PS2-1, MS-PS2-2, MS-PS3-1

+7

Standards-aligned

Christyn Polk

Used 13+ times

FREE Resource

40 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

True or False: All solid objects deform when forces are applied to them

True

False

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A __________ is an instance of one moving object striking another.

Collision

Variable

Scenario

Change in shape during a collision is caused by __________.

Energy transfer

gravity

force

All of the Above

What is the maximum amount of deformation an object can withstand beyond it cracks or splits apart?

Breaking Point

Deformation Point

Elastic Limit

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

_________ means to bend or change shape.

Collison

Deform

Force

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The largest amount a sample could be deformed and still return to its original shape is called the __________.

Breaking Point

Deformation Point

Elastic Limit

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a key characteristic of protective materials that makes them effective at absorbing impact?

a. They are completely solid with no gaps

b. They contain air pockets or spaces

c. They are made of metal only

d. They are always transparent

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