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

Identify the energy transfer.

light energy to .......................... ............................

(use small letters)

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

Fill in the Blanks

Problem: A car travels a distance of 200 meters in 20 seconds. Determine the speed of the car.

Answer:

m/s

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

Determine the type of simple machine.
(write in small letters)

Multiple Choice

What type of simple machine is shown in the picture?

Water well

• Pulley
• Inclined plane
• Screw
• Gear

Fill in the Blanks

What type of simple machine is shown in the picture?

(write in small letters)

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