10 water by weight.
7
EXERCISES A. Answer in Detail 1 In what all wavs are human beings dependent on water 2What are the oles of water in plante? St some of the uses of water in various industries and for other commercial purpnses 4 How does drought afet human beings. plants and animals 5. Explain the disaster caused by floods 6. What is rainwater harvesting? How is it done? B. Answer Briefly What are the maior sources of water on carth' 2 What is water table? 3. In what all forms do you use groundwater? 4 Name two major natural disasters caused by water. 5. When does drought occur? 6. How does soil get affected due to (a) scarcity and (b) excess of water: In which condition does rain assume the shape of tlood? S. Two-thirds of the earth's surface is covered with water. Then why should we conserve water? 9 How do droughts and floods affect aquatic life? C. Answer in One Word or a Few Words Ci. State whether the following statements are True (T) or False (F). 1. One-third of the earth's surface is covered with land. F 2. Water is essential for all living organisms. 3. Droughts lead to soil erosion. 4. Floods occur due to heavy rain for a long period of time. | 5. In rooftop rainwater harvesting, water is synthesized. T C2. Fill in the blanks. 10 water by weight. . A human body has 2. Excretion of water from the human body occurs in the form of LheatE lnc Gnound waHe AainWae lujfau wale 3. The major sources of water are EEKS 4. laH Fabl is the leyel of water under the ground. and 5. Excessive rainfall causes gW CS C3. Multiple Choice Questions (MCQs): Choose the correct answer for each of the following. . Water level goes down during (d) both (a) and (b). (a) flood. 2. Which of the following happens to soil during drought? (a) Drying up r drought. (c) none. (b) Hardening (c) Cracking Lt) All of these 224
Transcript of 10 water by weight.
EXERCISES
A. Answer in Detail 1 In what all wavs are human beings dependent on water
2What are the oles of water in plante? St some of the uses of water in various industries and for other commercial purpnses
4 How does drought afet human beings. plants and animals 5. Explain the disaster caused by floods
6. What is rainwater harvesting? How is it done?
B. Answer Briefly
What are the maior sources of water on carth'
2 What is water table?
3. In what all forms do you use groundwater? 4 Name two major natural disasters caused by water.
5. When does drought occur? 6. How does soil get affected due to (a) scarcity and (b) excess of water:
In which condition does rain assume the shape of tlood?
S. Two-thirds of the earth's surface is covered with water. Then why should we conserve water?
9 How do droughts and floods affect aquatic life?
C. Answer in One Word or a Few Words
Ci. State whether the following statements are True (T) or False (F).
1. One-third of the earth's surface is covered with land. F
2. Water is essential for all living organisms.3. Droughts lead to soil erosion. 4. Floods occur due to heavy rain for a long period of time. |
5. In rooftop rainwater harvesting, water is synthesized. T C2. Fill in the blanks.
10 water by weight. . A human body has 2. Excretion of water from the human body occurs in the form of
LheatE lnc Gnound waHe AainWae lujfau wale
3. The major sources of water are EEKS
4. laH Fabl is the leyel of water under the ground.
and
5. Excessive rainfall causes gW CS
C3. Multiple Choice Questions (MCQs): Choose the correct answer for each of the following.
. Water level goes down during (d) both (a) and (b). (a) flood.
2. Which of the following happens to soil during drought?
(a) Drying up
r drought. (c) none.
(b) Hardening (c) Cracking Lt) All of these
224
f the following is/are the effects of floods?
H hich ot
the.
a) Soil erosion
Scarcity of groundwater
(b) Outbreak of epidemics
be conserved by gBoth (a) and (b)
)rainwater harvesting.
disposing rmful waste in water bodies.
Niter can
(b) using judiciously.all of these.
ater is
essential
because it
helps in digestion 1J in digestion, (ii) helps in excretion, (ii) maintains body temperature
not tial because it
)(i) and (i) only
) (i) and (iii) only.
(b) (i) and (ii) only.
d all of these.
'hat percentage of plant body weight is water?
70%
b 30% (c) 10%
(d) 15%
Groundwater is found in
(b) wells. a) springs.
(c) lakes. both (a) and (b).
Water is needed
a) in agriculture.
(6) for producingelectricity
c) in many
industries.
(dall of them.
ach the two columns.
Column A
Column B
(i) Method of water conservation3
(ii) Saline water
(ii) A water plant
(iv) Leads to soil erosionb
Groundwater
Drought Rainwater harvestin8
Sea water
Whale
(v) Purest
form of water 8
6Flood
(vi) Obtained from handpumps
and tube wells
(vii) Scarcity of water lor a long time 2
(vii) An aquatic animal 5
.Hydrilla &Rainwater
Uurganize a SAVE WATER poster-making
competition
in your
school.
DO AND LEARN
aking a Poster
estigate and Interpret
st the way Which
you will
save
water at your home
and school.
I nr
droughts
or floods
in India, their history
and their effe
Present in your class.
esParch and Praiect
ffects on
Ctass-6 Ch-16 Tmpurlana 4tWaten Page No
Date
ANUON etl An-1 D HAman beings_depond pon e
gultulkauhl 2uxpues.
peEuleun Helineuw'eu CndIn seufz (89E Ct as o4lant in pouw GneHaHO SLsEd tHLALYt{qJuumas
(5 Stuneeded in me ctyes deh as ete
ton2K _l atn in lants aH-
ag awount teu Oatr JsmEdesl dusngphatoyntheuis 18t0ess
12)lakef Allp uanakatiew mlnal
(3) alue help u quXminatbr o KeLds
ant ale loA LAatu tougl tu kaes (
Date / Page No.
nr 3 U o_ La in Tndtiues
Waleu uCh as Chemical fudL Lues
wed in ma ny induutUeL
DetMoleum ape mill deel millk etHokeum
neie ex zen Cnel HoLyta
ielust oues alaley iialsg ued' us a L
nerating LnLNAy_ IE alesaet LX a LeOLa nt in poe qentlate
LZa atu 'in am meiCal punpaMe- laeL LA'ALL Ln hatels, es
ndhtuth 9ns XLAtaunats
d aw katip iinknd_ bathing_in 1ECH0atfnal
acHoffie nmning ete
eopla n kasbhmr ano keuala le naats fn_uic&_yaalu G medium.
y edect o puaugt on Human Beings ()suing Bsaught, fatnexd ther
in wme L)Many human I die cu to
ddyadsailor (1) Thaaaler ahl Go0s olow is
Water
Date / Page N.
Ecct uaught on llonts= ()Aai begins t dsy and Get atka Gw Acil bétemu fnhestil tat elect Gu0fh plantat () vegitaiew ama loat
tuirmas 1) u als tautdkiq duuth deyduate 2) ack s tod and nkin�_oae fota .chantt
n ild Cumalu migatien a wLalfe
Ins 5 AaTR CLued y_ls0ols -Elead dsil eHoon (2 deutuoya the (HOD and dtoued yeod maksial. 13 t kads theshastage a pod ()eing heayHaÍns, Huthan tar chana
epidem C,diarh gla maauia eto (5 Ca &haseAbuildings_et 6 loacls_ditunb fhe dainagAyf
Date: /1
Page No.
u-6 7ka methsol Lons using aP y Lollect saln uohfe and Nfoiy it Aote Ae_Juis s CaLled
Kan Oculek Haat £an o dine leikchusque
(D Kooltep Rainley Hoieatihen us meMsdAninuatex is colltcid
m h oeltop_ad alsuNd into a ddohageanp thipugw pe
Ecan pe dibectly allw p_ GE in the gaund tkougu Aue ladesL
Av dowLes Watt-KainJaleRLAURut UKU lakesAtHeay and'amds and R8ndIate
hyn-2 lale able eclwakA LAoley_bu
dainkirgmuniihaluoes
D.ate
Pge No
Varwta dwadens by wate ougtat andflodd
u-5 uwnlal a Jong perueol t ead 4U/aus brsblen Je buougut
Acasitu L dues p_CemAete ad ond. (2 begins dp (ack and become nutu.
bcemes
w extes5 ate Kunming uoRH Wadhes CUay u
Aw7 hen thw is hecuy_and Centnusu
tho&le hould ConwAAN_a bicauu mast a tho 9QTeuaailakl ontue CsLAump-H?n eath
h 1_clugugat_ill duy p tha uIalex becly vatleal o_deatn & ma Y anumal SuingLeool udatey uuh_juh0y-tuCguicLe ks_tha a ohscumoy be Kled du o humevntocatOn.
