Extra practice sheet for the practice purpose .
Chapter :- Heat & It's Transfer
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Extra practice sheet for the practice purpose .
Chapter :- Acid ,Base & salts
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Extra practice sheet for the practice purpose .
Chapter :- Fiber and fabric
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Extra practice sheet for the practice purpose .
Chapter :- Physical and chemical changes
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Extra practice sheet for the practice purpose .
Chapter :- Motion and time
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Date :- 10\06\2022
Flow charts of Chapter 1 (Nutrition in plants)
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PODAR
INTERNATIONAL SCHOOL,MEHSANA
STD:-VII SUB: SCI
CH:- WASTE WATER TREATMENT
WORKSHEET
Q-1) Fill in
the blanks.
a) The pipes
from each house or a building are connected ________ .
b) The mainhole
are located at a distance of on an average
at _______ .
c) Waste
water flowing through the drainage pipes is called ______ .
d) Most
septic tanks are installed ________.
Q-2) What is
sewage ?
Q-3) What is
meant by grey water and black water?
Q-4) Which
sources of wastewater can be immediately controlled by us?
Q-5) Write
the composition of wastewater ?
Q-6) Why is
wastewater treatment so important ?
Q-7) Describe
the three process of primary treatment ?
Q-8) Explain tertiary wastewater treatment?
Q-9) Explain secondary treatment.
Q-10)Name two inorganic impurities present in sewage.
Q-11)Animal waste, oil and urea are some of the organic
impurities present in sewage. Name two more organic impurities
present in sewage.
Q-12)Name two alternative arrangements for sewage disposal
where there is no sewerage system.
Q-13) A man travelling in
a train threw an empty packet of food on the platform. Do you think this
is a proper waste disposal method? Elaborate.
Q-14) Why should we not throw
(a) used tea
leaves into sink?
(b) cooking oil and
fats down the drain?
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PODAR
INTERNATIONAL SCHOOL,MEHSANA
STD:-VII SUB:-SCIENSE CH:-SPARK OF ELECTRICITY WORKSHEET
Q-1) Define
the following.
a)
Solenoid c) Short circuit
b) Electric
fuse d)Voltmeter
Q-2) What
will happen if we replace the wires with rubber bands?why?
Q-3) What
will happen if you keep the wires,bulb and cell remains connected for long time
?
Q-4)What is
electromagnet ?
Q-5) Write
the applications of electromagnets ?
Q-6) How are
electromagnets useful to doctors ?
Q-7) State
three ways in which electromagnets differ from magnets.
Q-8) Draw
the symbols of cell,battery.closed switch(on),open switch(off),bulb,wire.
Q-9) What is
the use of switch in an electric circuits ?
Q-10) What
is heating effect of an electric current ?
Q-11) What
is lighting effect of an electricity ?
Q-12) What
is MCB ?
Q-13)
Difference between electric current &electric circuit ?
Q-14) Why
are fuse wire not used in circuit containing electric cell ?
Q-15) What
is magnetic field ?
Q-16) Name
the device used these days in place of electric fuses in electrical circuits.
Q-17) Write
three effects of electricity ?
Q-18) Name
the scientist who discovered the magnetic effect of electric current.
____________________________________________________________
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PODAR
INTERNATIONAL SCHOOL,MEHSANA
STD:-VII SUB:SCI CH:-DIVINE FOREST
WORKSHEET
____________________________________________________________
____________________________________________________________
Q-1) Explain how forests prevent floods?
Q-2) Explain
how forests prevent soil erosion?
Q-3) Explain
how forests maintain supply of nutrients?
Q-4) Explain
how forests serves as a source of tourism and recreation?
Q-5) What
role does decomposer play in forest?
Q-6) Explain
the importance of forest?
Q-7) Explain
the importance of forest?
Q-8) Explain
how forest affects our food chain?
Q-9) Why
forest floor seemed to be dark coloured?
Q-10) What
is a food web?
Q-11) What
do you mean by canopy?
Q-12)
Differentiate between humus and decomposers?
Q-13) Which
forests are called jewel of the Earth and world largest pharmacy &Why?
Q-14)
Explain how increase in population can cause of deforestation?
Q-15) List
the ways to conserve forests.
Q-16) Write
down the adverse effects caused by deforestation?
Q-17)
Discuss the role of forest in maintaining the balance between oxygen and
carbondioxide in the atmosphere?
Q-18) Write
down causes of global warming?
Q-19) State
the consequence when one food chain is disturbed in an ecosystem.
Q-20) What
is food web?
PODAR INTERNATIONAL SCHOOL
STD:-VII
SUB:-SCIENCE CH:- RADIENCE OF
LIGHT
Q-1) What is
bioluminescence ? Give two examples.
Q-2) Design
an activity to show that light always travels in a straight
line.
Q-3)Write
the difference between specular reflection and diffused reflection.
Q-4) State
the characteristics of image formed by a concave convex mirror.
Q-5) What do
you mean by reflection ?
Q-6 ) State
the characteristics of image formed by a plane mirror?
Q-7) Why the word ‘AMBULANCE’ is painted left right
inversed on vehicle?
Q-8) State
the principle used in creating a mirror
image?
Q-9) State
the uses of concave and convex mirror?
Q-10) What
is virtual image? Give example.
Q-11) What
is real image? Give example.
Q-12) What
is other name for concave lens?
Q-14) What
kind of image is formed by concave lens?
Q-15) What
kind of image is formed by convex lens?
Q-16) State
various applications of lenses?
Q-17) What
is a lens?
Q-18) Write
the difference between mirror and lens?
Q-19) Write
uses of concave and convex lens?
Q20) What is
the principal focus of a lens?
Q-21) Define
the following.
a) Centre of curvature
b) Radius of curvature
c) Pole
d) Principal axis
e) Focus and focal point
f) Focal length
PODAR INTERNATIONAL
SCHOOL ,MEHSANA
STD:- VII
SUB:- SCI CH:- DURATION OF MOTION
Q-1) Write
the difference between rest and motion ?
Q-2) Write
the difference between slow and fast motion? give example.
Q-3) What is
the full form of FPS system of measurement?
Q-4) What is
the full form of CGS system of measurement?
Q-5) What
kind of motion is exhibited by
a) Earth during rotation and revolution
b) A moving swing
Q-6) What is
the full form of MKS system of measurement?
Q-7) Define
the following.
a) Sundial
b) Sandclock
c) Water clocks
d) A day
e) A night
Q-8) What is
time period of simple pendulum?
Q-9) Write
the formulae to calculate speed?
Q-10) What
is speedometer and write its uses.
Q-11) A bus
moving at an average speed of 55 km/h takes 6 hours to reach its
destination.Find the distance covered by the bus.
Q-12) What
is odometer and write its uses?
Q-13) Arman
takes 50 minutes to travel to school by car. The odometer of the car shows that
car has travelled at a 55 km distance. Calculate the speed of the car.
Q-14) Fill
in the blanks.
a) The standard unit of length is
__________.
b) The standard unit of mass is
_________.
c) The standard unit of time is
_________.
d) The standard unit of temperature is
________.
e) The sand clock is also called an
___________.
PODAR
INTERNATIONAL SCHOOL
STD:-VII
SUB:- SCI CH:THE TREASURE BENEATH OUR FEET
Q-1) Define
the following.
a) Humus
b) Weathering
c) Soil horizons
d) Soil Profile
e) Bedrock
f ) Absorption capacity
g) Percolation of water
Q-2) Explain the different types of soil and give example?
Q-3)Write the properties of soil and explain it?
Q-4) Define soil erosion and soil pollution and write its
causes.
Q-5) Describe the different ways of soil conservation.
Q-6) Which crop grows well in clayey soil ?
Q-7) What are the natural causes if soil erosion ?
Q-8) Which type of soil has the greatest percolation rate?
Q-9) How to calculate rate of percolation?
Q-10) How to calculate absorption capacity of soil?
Q-11) Which type of soil is considered the best for
agriculture and gardenging?
Q-12) Which type of soil has the largest particles?
Multiple Choice Questions
1. The microorganisms
present in the soil require moisture (water) and nutrients for growth and
survival. Choose from the options below the habitat (place) where the soil
has plenty of water and nutrients.
§ (a) Desert
§ (b) Forest
§ (c) Open field
§ (d) Cricket ground
2 Availability of water and minerals in the soil for
maximum absorption by roots is in the
§ (a) B-horizon
§ (b) C-horizon
§ (c) A-horizon
§ (d) surface of soil
3.Soil conservation measures are mainly aimed at
protecting which of the following?
§ (a) Plants
§ (b) Top soil
§ (c) Sub soil
§ (d) Soil organisms
4.Read the following statements with reference
to soil.
(i) Weathering is a very fast process of soil formation.
(ii) Percolation of water is faster in sandy soils.
(iii) Loamy soil contains only sand and clay.
(iv) Top soil contains the maximum amount of humus.
(i) Weathering is a very fast process of soil formation.
(ii) Percolation of water is faster in sandy soils.
(iii) Loamy soil contains only sand and clay.
(iv) Top soil contains the maximum amount of humus.
