GK_PART 3

Oliver wants to separate three different mixtures. Choose the most suitable technique he should use to separate each mixture.

Copper powder and steel powder?

• Using a magnet

• Deposition

• Sieving

• Distillation

Look at the things below. Which of them are the sources of light?

• Lamp, torch, sun, candle

• mirror, torch, sun

• Lamp, sun, candle, eyes

• candle, moon, curtain, lamp, eyes

Jamila is singing on the stage. There are 5 spotlights as the picture shows, and each spotlight is turned on one at a time.

Which spotlight produces almost no shadow?

• A

• B

• D

• E

Which of the following is a solution?

• A bowl of salad

• Oil and water

• Sugar water

• Sand and water

Which method(s) can help you collect both salt and water from sea water?

• Evaporation

• Deposition

• Filtration

• Distillation

Which method(s) can we use to separate a mixture of sand and water?

• Filtration

• Deposition

• Evaporation

• All of the above

Shadows are made by (a)   The shadow can change its shape and size when we

change the position of the source of light and the blocking object.

... are objects which can produce light on their own.

(a)  

We can see a yellow object because ....................

• It absorbs yellow lights

• It absorbs all lights

• It reflects yellow lights to our eyes

• It reflects all lights to our eyes

Which of the following sentences is FALSE?

• Solids can change directly into a gas without going through a liquid state.

• Solids can change directly into a gas without going through a liquid state.

• A solution is a mixture that we can distinguish the components using our bare eyes.

• Filtration techniques do not cause chemical change.