Primary 4 Basic Science and Technology Flashcards: States of Water, Water Cycle and Rain Formation

Question 1

Pure water has no colour, taste, or ____.

Accepted Answer

odour

Question 2

What are the three states of water?

Accepted Answer

solid, liquid, and gas

Question 3

Water in its solid state is called ____.

Accepted Answer

ice

Question 4

Water vapour is water in the ____ state.

Accepted Answer

gaseous

Question 5

What is evaporation?

Accepted Answer

the change of liquid water into water vapour

Question 6

What is condensation?

Accepted Answer

the change of water vapour into liquid water

Question 7

What is freezing?

Accepted Answer

the change of liquid water into ice

Question 8

What is melting?

Accepted Answer

the change of ice into liquid water

Question 9

The main cause of evaporation in the water cycle is heat from the ____.

Accepted Answer

Sun

Question 10

Water vapour cools and condenses to form ____.

Accepted Answer

clouds

Question 11

Rain falls when cloud droplets become too ____ to remain in the air.

Accepted Answer

heavy

Question 12

Water gathering in rivers, lakes, and oceans is called ____.

Accepted Answer

collection

Question 13

Which process changes water vapour into droplets: melting, freezing, condensation, or evaporation?

Accepted Answer

condensation

Question 14

Which is NOT part of the water cycle: evaporation, condensation, rainfall, or burning?

Accepted Answer

burning

Question 15

Droplets forming outside a cold bottle are caused by ____.

Accepted Answer

condensation

Question 16

Wet clothes dry because liquid water ____.

Accepted Answer

evaporates into the air

Question 17

The correct sequence for rain formation is evaporation, condensation, and ____.

Accepted Answer

precipitation

Question 18

Why does covering a boiling pot produce water drops under the lid?

Accepted Answer

steam cools and condenses on the lid

Question 19

What keeps water moving repeatedly between Earth and the atmosphere?

Accepted Answer

the water cycle

Question 20

The main relationship between the water cycle and rain is that the cycle ____.

Accepted Answer

supplies condensed water that falls as rain

Strong work.