W36 - G4 - Final 2 Test Review

Grade 4 - Review
Final 2 Test

​Mrs. Kia's Class

Lessons learned:

Energy transfer

Friction

Air resistance

Water resistance

Simple Machines

You will use:

​Individual

Team

Energy Transfer

​Write down at least six forms of energy.

Forms of Energy

Potential

Kinetic

Chemical

Heat

Light

Elastic

Sound

Magnetic

Electromagnetic

Electrical

Multiple Choice

Identify the energy transfer.

• kinetic to sound

• sound to electrical

• potential to sound

• chemical to electrical

Fill in the Blanks

Multiple Choice

It is stored in radar, TV, radio ...

• chemical energy

• electromagnetic energy

• elastic energy

• electrical energy

Multiple Choice

When a battery-powered flashlight is turned on, which energy transformation occurs?

• Chemical to electrical energy

• Mechanical to heat energy

• Chemical to light energy

• Potential to kinetic energy

​Energy ............................. be created or destroyed.

​Write the missing word.

What UNIT measures energy?

joule (J)

What is the formula for WORK?

Work = Force . distance

A person applies a force of 50 Newtons to push a crate along the ground. The crate moves a distance of 10 meters.

Calculate the work done by the person in moving the crate.

​Friction and Air resistance

Multiple Choice

What is friction?

• Friction is the force that opposes the motion of an object.
• Friction is the force that attracts objects together.
• Friction is the force that accelerates the motion of an object.

Multiple Choice

What is air resistance?

• Air resistance is the force that attracts objects to the ground.
• Air resistance is the force that drives an object forward in the air.

• Air resistance is the force that increases the speed of an object in motion.
• Air resistance is the force that opposes the motion of an object through the air.

​Draw an arrow that represents a bigger force.

Multiple Choice

Choose the correct amount of force.

• bigger force

• weaker force

How do you calculate SPEED?

Write the formula.

speed = distance/time

Multiple Choice

In a skydiving experiment, two parachutes are deployed—one large and one small. As they descend (fall down), which parachute experiences a greater effect of air resistance?

• The smaller parachute
• Both parachutes experience the same effect
• The larger parachute
• The parachutes experience no air resistance

​............................. refers to the force that opposes the motion of an object as it moves through water.

​Fill in the blank.

Multiple Choice

Which activity becomes harder to do because of water resistance?

• Swimming in a pool

• Riding a boat in a river

• Running in a rainstorm

• SwBathing in a bathtubimming

Multiple Choice

How does the shape of this shark help it to move quickly through the water?

• The shape is square and creates resistance.
• The streamlined shape reduces drag.
• The shape is irregular and unstable.
• The shape is bulky and slows it down.

SIMPLE MACHINES

​What are the six types of simple machines?

​wedge

pulley

inclined plane

wheel & axle

lever

screw

Multiple Choice

Why are simple machines called force multipliers?

• Simple machines allow a smaller input force to generate a larger output force.
• Simple machines have no impact on force
• Simple machines create a balanced force
• Simple machines reduce the need for force

Fill in the Blanks

Multiple Choice

What type of simple machine is shown in the picture?

Water well

• Pulley
• Inclined plane
• Screw
• Gear

Fill in the Blanks

Multiple Choice

What type of simple machine is shown in the picture?

• lever
• pulley
• wheel
• screw

Multiple Choice

Last question:
What is the purpose of using simple machines?

• To increase efficiency
• To confuse users
• To complicate tasks
• To make work easier