Grade 5: Science - Forces and Machines

Grade 5: Science - Forces and Machines

Friday, 28th of May, 2021

Have you ever watched a football game?

How can the foot ball move?

What is FORCE?

• It's an energy such as push or pull.

• Because of force it changes the motion or shape of an object.

Example:

• When we make pots. We use force to mold it.

• When we stop. We remove the force on it.

• However, the clay will not be back to its same form again.

• PERMANENT CHANGE

Example:

• When we squeeze this rubber duck. We use force to squeeze it.

• When we stop. We remove the force on it.

• However, the rubber duck will be back to its same form again.

• TEMPORARY CHANGE

Identify what kind of forces changes are shown in the pictures.

PERMANENT CHANGE OR TEMPORARY CHANGE

Multiple Select

A karate kid kicks a piece of wooden block.

What change happen to the wooden block when it's broken and the force is removed?

• Permanent Change

• Temporary Change

Multiple Select

A colored paper is cut into many pieces.

What change happen to the colored paper that is cut into pieces and the force is removed?

• Permanent Change

• Temporary Change

Multiple Select

A rubber band is stretched.

What change happen to the rubber band that is stretched and the force is removed?

• Permanent Change

• Temporary Change

Multiple Select

A blanket is fold into half.

What change happen to the blanket when the force is removed?

• Permanent Change

• Temporary Change

Multiple Select

A diver stand at the tip of a diving board.

What change happen to the diving board when it stretched and when the force is removed?

• Permanent Change

• Temporary Change

Multiple Select

A softdrinks can is squashed.

What change happen to the softdrinks can when it's squashed and the force is removed?

• Permanent Change

• Temporary Change

Multiple Select

An automatic door is pushed.

What change happen to the door when it's pushed and the force is removed?

• Permanent Change

• Temporary Change

Open Ended

Summarize: What is Temporary Change?

Open Ended

Summarize: What is Permanent Change?

Open Ended

Summarize: What happens to an object when force is release?