Review

Force and Motion

100

In which diagram the object move to the right?

D and A

200

In which diagram the object not move?

B

300

In which diagram the object move to the left?

C

400

A tow truck exerted 1,000 N to drag a car. A force of 100 N was also exerted to push the car before it started moving. What is the resultant force then?

1100 N

500

Team A played tug-of-war with Team B. Each team had 3 players. Each player in Team A exerted 500 N. How much force should each player of Team B exert so they can win?

600 N

Force and Motion

100

What is the resultant force of team B?

1,800 N

200

Which floor gives the lowest friction?

D

300

Arrange from lowest to highest friction?

D-B-C-A

400

Which device to use in measuring newton?

Spring scale

500

If the resultant force is zero, what will happen to the object?

not move

Changes of matter

100

If there are 2 cows used in pulling a cart with 40 N and 60 N, how much will be the resultant force?

100 N

200

Cutting paper into small pieces is an example of what kind of change.

physical change

300

Burning a paper and producing an ash is an example of what kind of change?

Chemical change

400

What do you call a process by which an iodine which is solid turned directly to gas.

sublimation

500

A hot air balloon has 8 strings joining the balloon and the basket. Each strings exerts 300 N to hold up the basket. If only 4 strings are used for the same hot air balloon, how much force will each string need to exert?

600 N

Changes of matter

100

• When water is heated until it is boiling, water vapour will occur.
• If a glass with cold water is placed on a table top, water droplets will form on the glass.

What changes takes place in A and B?

A is vaporization

B is condensation

200

Vaporization and condensation are examples of what type of changes?

physical change

300

Which is correct about making ice?

a. solid changes to gas

b. liquid changes to gas

c. gas changes to liquid

d. liquid changes to solid

liquid to solid- solidification

400

Which is a physical change?

a. making ice                      b. cooking curry

c. burning wood                 d. boiling eggs

making ice

500

Dissolution took place in what glass?

a. Glass A                      b. Glass B

c. Glass C                      d. none of the above

Glass B

Water Cycle

100

What is dissolution?

It looks uniform and no more solids inside.

200

Which of the following is soluble in water?

a. oil                                     b. sand

c. salt                                    d. flour

salt

300

A process by which the water falls to the ground.

precipitation

400

A process by which the water runs down the hill and go back to water sources.

collection

500

A process by which the Sun’s heat turns water into gas called water vapour.

evaporation