IS ch2.1 water cycle

Question 1

how much water and land covers the earth surface

Answer 1

70% water 30% land

Question 2

does the volume of water on earth change

Answer 2

No

Question 3

what are 3 physical states of water?

Answer 3

Solid(ice), Liquid (water) , gas( water vapour and steam)

Question 4

At what temperature does water melt or freezes? what can the temperature be called (2 names)

Answer 4

0degrees (melting point or freezing point )

Question 5

How does the temperature affects water changing into different states

Answer 5

when the temperature changes, the state water remains unchanged ( 10-70 degrees the state of water remains as liquid) when the temperature remains unchanged the state of water changes like ( at 0 degree ice changes to water and water changes to ice ) and at 100 degree, water boils to steam.

Question 6

does water changing to ice absorb energy or releases energy ? what is the process called?

Answer 6

releases , freezing

Question 7

does water changing to steam absorb energy or releases energy ? what is the process called?

Answer 7

absorbs, boiling

Question 8

does ice change to water absorb energy or releases energy? what is the process called?

Answer 8

absorb. melting

Question 9

melting takes place at a ____ temperature____degree

Answer 9

fixed,0

Question 10

where does water absorb energy from?

Answer 10

the surroundings ( like air and water)

Question 11

does water change to water vapour absorb energy or releases energy? what is the process called?

Answer 11

absorbs energy , evaporation

Question 12

what temperature does boiling and evaporation take place

Answer 12

100 degrees and any temperature

Question 13

what do wet clothes dry after some time under the sun?

Answer 13

bc water evaporates to form water vapour which goes int=to the air around the clothes

Question 14

why do we become cold when we get out of a shower or pool?

Answer 14

bc water on our skin evaporates and absorbs energy from our bodies .

Question 15

why does sweating keep our bodies cool?

Answer 15

the water one sweat Evaporates from our skin and absorbs the energy in our bodies

Question 16

Name the process of water vapour or steam become liquid

Answer 16

condensation

Question 17

when water vapour comes into _____ with ______ surfaces it condenses into _______ then forms____ ____ .

Answer 17

contact , cold, water , water droplets

Question 18

example of condensation , taking a cold drink ( coke ) out of the fridge after some time you observe some water droplets on it , why?

Answer 18

The water vapour in air comes into contact. with the cold surface of the can and condenses into water which then forms water droplets on the can.

Question 19

example of condensation, when you boil a pot of water , there are water droplets on the glass lid of the pot, explain why.

Answer 19

when water boils, steam rises and comes into contact with the cold surface of the glass lid and condenses into water which then forms water droplets on the glass lid

Question 20

does water vapour or steam absorbs or releases energy? what is the process called?

Answer 20

releases, condensation.

Question 21

is steam visible?

Answer 21

no it is not

Question 22

what is the white mist above the boiling water?

Answer 22

tiny water droplets condensed near the steam .

Question 23

what is the name of the cycle water goes through in nature?

Answer 23

water cycle.

Question 24

where does the energy that powers the water cycle come from?

Answer 24

the Sun

Question 25

water in ___,______ and on ___ absorbs energy from the ___ and ________ to form ___ ____ . the _____ ____ is then carried upwards by ____ ___ beneath it .

Answer 25

seas, rivers , land ,Sun , evaporates ,water vapour , water vapour , warm air.

Question 26

What are the 2 main process of the water cycle?

Answer 26

Evaporation and condensation

Question 27

How are clouds formed?

Answer 27

The cold air in the sky cools the water vapour and it condenses to form water droplets which joins to form clouds.

Question 28

clouds may be carried to other places by____.

Answer 28

wind

Question 29

As more water vapour condenses, water droplets in the clouds grow _____and____. Eventually, they become so heavy that they fall as ___, ___, ___

Answer 29

larger, heavier,rain,snow,hail

Question 30

what factors affect the rate of evaporation

Answer 30

1. temperature of surrounding 2. humidity 3. presence of wind 4. volume of water 5. surface area exposed

Question 31

does the rate of evaporation increase or decrease when the temperature is higher?

Answer 31

Yes

Question 32

does the rate of evaporation increase or decrease when thehumidity is hight?

Answer 32

decrease

Question 33

does the rate of evaporation increase or decrease when the surface area is smaller

Answer 33

decrease

Question 34

does the rate of evaporation increase or decrease when there is wind?

Answer 34

increase

Question 35

does the rate of evaporation increase or decrease when the volume of water is low

Answer 35

increases