Life would be impossible without force. Force affects the movement of objects. Which force causes a rolling ball to stop after a few seconds?

Friction affects all objects. Which of the following statements about friction is TRUE?

Friction is a force that opposes the motion of two objects. Will it be easier for a person to push a table on a carpeted floor?

A book on top of the table shows static friction. Which of the following statements describes static friction?

Static friction is a force that acts between objects in contact. Which of the following is an example of static friction?

What type of friction occurs when a body slides over a surface?

Friction is a force that affects the movement of an object. It makes objects stop or slow down because it opposes motion. Which of the following BEST describes kinetic friction?

A delivery man uses a wooden ramp when he delivers thus, packages do not slide off easily making his work take longer. What would be the best way to make the packages slide easily?

The effect of friction can be desirable or undesirable. Which of the following shows undesirable effects of friction?

You turn on the TV and it produces pictures and sounds. Which form of energy is associated with the movement of electrical charges?

As solar panels get enough energy from the sun, which does it produce?

When you touch your vocal cord as you talk, you can feel the vibrations inside. The number of vibrations must be about 20 to 20 000 in a second. What form of energy does it show?

Sound is the movement of energy through a substance – like air or water. How is sound produced?

Sound waves carry vibrations. Which of the following describes how sound is produced?

What form of energy is possessed by the ringing bell in the church tower?

Which of the following describes sound energy?

Why does blowing into the trumpet make a sound?

Which of the following BEST describes heat energy?

Which energy causes us to perspire during summer days?

Our body is considered as a heat engine. Which situation uses heat energy in our body?

Which of the following materials produces heat energy?

Our body is considered as a heat engine. Which situation uses heat energy in our body?

During warm days, you cool yourself by damping your skin with a wet towel. Which of the following takes place?

What form of energy can travel through a vacuum or an empty space?

Which of the following describes light energy?

Which of the following materials produces light energy?

Which of the following shows that heat energy is present?

What form of energy do plants (vegetables) give you when you eat them?

Which of the following shows a change from light energy to heat energy?

Which of the following shows energy transformation from heat energy to light energy?

Which activity shows the transformation from electrical energy to sound energy?

What energy transformation happens in a doorbell when pressed?

Maria and her parents went to the park and came home late. Their house was still dark. Her father switched on the light to illuminate the whole house. What energy transformation takes place?

What sequence of energy transformation takes place when you switch on a lamp?

We use headphones when we are talking to someone on a cell phone. What are the forms of energy present in headphones?

Simple machines are simple tools that are found around us. Which of the following describes the function of simple machines?

During the flag ceremony, Karl is in charge of raising the flag. Which of the following simple machines was used by Karl?

Which situation shows the use of a simple machine?

Allan uses the ramp to help his sick friend in a wheelchair to move up the building. Which of the following simple machines does a ramp belong to?

Eva helps her mother to slice the vegetables using a knife. Which of the following simple machines does a knife belong?

Roy wants to hang the picture frame on the wall. Which simple machine will Roy use?

Screws are used to tighten two objects together. Which of the following does NOT describe a screw?

A heavy object could be rolled up instead of lifting it straight. Using this simple machine can save effort. What simple machine is this?

Which simple machine is use in raising water buckets from wells?

Gemma is trying to open the doorknob. Which type of simple machine is a doorknob?

Using a wheel and axle makes our work easier. Which of the following demonstrates the use of wheel and axle?

Wedge is an example of a simple machine. Which of the following activities will you use to lessen your work?

Which shows a precautionary measure in using simple machines?