CLASS TEST, CLASS 6,Water CHAPTER 14

 MULTIPLE CHOICE QUESTIONS  (1 marks each)

1. Which of the following activity does not involve use of water? 

(a) Washing clothes (b) Bathing (c) Cleaning utensils (d) Drying wet clothes 

2. In which of the following activities will you use minimum amount of water? 

(a) Bathing (b) Brushing teeth (c) Washing clothes (d) Mopping a room 

3. The quantity of water required to produce one page of your book is

 (a) one bucket (b) ten buckets (c) two glasses (d) few drops

4. Water in our tap comes from a 

(a) river (b) lake (c) well (d) river, lake or well 14 Water 

 5. In which of the following case evaporation of water will be slowest? 

(a) A tray of water kept in sunlight. (b) A kettle of water kept on a burner. (c) A glass of water kept in a room. (d) A bucket of water kept on rooftop. 

6. Transpiration is a process in which plants 

(a) receive water from soil. (b) absorb water vapour from air. (c) prepare food from water. (d) release water vapour.

 7. Clouds are 

(a) tiny drops of water floating in air. (b) mixture of dust and water vapour. (c) particles of water vapour. (d) rain drops in air. 

8. Wells are fed by

(a) pond water. (b) lake water. (c) rain water. (d) ground water.

 9. Floods cause extensive damage to 

(a) crops. (b) property and human life. (c) domestic animals. (d) all of the above.  

10. “Catch water where it falls” is the basic idea behind 

(a) recycling of water. (b) making dams to store water. (c) rain water harvesting. (d) condensation of water vapour.

SHORT ANSWER QUESTIONS

11. Why do wet clothes placed on a clothes line get dry after some time? Explain.  (2)

12. Water kept in sunlight gets heat from sun and is evaporated. But how does water kept under the shade of a tree also gets evaporated? Explain.   (2)

13. How do the areas covered with concrete affect the availability of ground water?(3)

14. 18. Fill in the blanks selecting words from the following list snow, rain, clouds, vapour, evaporation, transpiration. Water, as _____ goes into atmosphere by the processes of ______ and _____ and forms ________, which on condensation fall in the form of ______ and _______.   (3)

CLASS TEST, Pollution of Air and Water, CLASS 8

MULTIPLE CHOICE QUESTIONS (1 MARK EACH) 

1. Air is a mixture of various gases. One of the gases is 21% part of the air and is essential for the survival of human beings. This gas is 

(a) nitrogen (c) ozone (b) oxygen (d) argon 

2. Which of the following is not a source of air pollution? 

(a) automobile exhaust (c) windmill (b) burning of firewood (d) power plant 

3. Boojho wishes to contribute in reducing air pollution. Which vehicle should he use for going to school? 

(a) car (c) autorickshaw (b) school bus (d) scooter

4. Which of the following is not a way to conserve water? 

(a) replace (c) reuse (b) reduce (d) recycle 

5. The type of pollution which is likely to affect Taj Mahal in Agra to a greater extent is

 (a) air pollution (c) soil pollution (b) water pollution (d) noise pollution 

6. Incomplete combustion of fuel such as petrol and diesel gives

 (a) nitrogen oxide (c) carbon monoxide (b) sulphur dioxide (d) carbon dioxide 

7. The phenomenon of marble cancer is due to 

(a) soot particles (c) fog (b) CFCs (d) acid rain

 8. Potable water is the water which is

(a) obtained from a river. (c) pure and fit for drinking. (b) obtained from a lake. (d) used only for washing clothes. 

9. Which of the following procedures will give you water free from all impurities? 

(a) adding chlorine tablets (c) boiling (b) distillation (d) filtration 

10. A pond contains clean water. Which of the following activities will produce least pollution of water? 

(a) washing clothes in the pond (b) animals bathing in the pond (c) washing motor vehicles in the pond (d) swimming in the pond. 

11. Trees help in reducing the pollution of our environment. Lakhs of trees are planted by people in the month of July every year. The occasion is called

 (a) forest Conservation Day (c) Van Mahotsav (b) plantation month (d) wildlife week 

12. Which of the following is not a green house gas? 

(a) nitrogen gas (c) methane gas (b) water vapour (d) carbon dioxide 

VERY SHORT ANSWER QUESTIONS (2 MARKS EACH)

13. Name the chemicals which are used in refrigerators and air conditioners and damage ozone layer when released in air. 

14. Name any two sources which cause air pollution due to suspended particulate matter. 

15. Name two gases which are mainly responsible for acid rain? 

16. The quality of air at various locations is monitored regularly by government and other agencies? In what way can you use these data? 

17. Combustion of fossil fuels generates a lot of air pollution. Can you suggest any two alternative sources of energy which do not cause any pollution? 

18. Name any two water pollutants which are toxic for plants and animals

Class test, Class 6, AIR AROUND US

Q1.  Fill in the Blanks:      (5)

1. The layer of air around the earth is known as ………………….. .
2. The component of air used by green plants to make their food, is ………………… .
3. Air is a gaseous …………….. .
4. …………….. is used to inflate tyres of vehicles.
5. The ………………… present in air helps in the formation of clouds.

Q2.Tick (✓) the Correct Option:      (6)

1. Air is a/an:
(a) mixture
(b) compound
(c) element
(d) none of these

2. Which is the largest component of air?
(a) Oxygen
(b) Nitrogen
(c) Carbon dioxide
(d) Water vapour

3. Air occupies space and has:
(a) colour
(b) smell
(c) mass
(d) none of these

4. ……………….. is a device which measures the air pressure.
(a) Barometer
(b) Thermometer
(c) Anemometer
(d) Ammeter

5. Which gas is released in respiration

(a) Nitric acid

(b) Carbon monooxide

(c) Carbon dioxide
(d) Sulphur dioxide

6. To release some of the air from the bottle shown in the given diagram, we should:

(a) push the glass further down

(b) tilt the glass
(c) pour more water into the basin
(d) blow bubbles into the glass

Q3. State True or False:        (5)

1. Air has no mass. ………………….
2. Air is a mixture of gases. ……………….
3. Air exerts pressure. ……………….
4. Nitrogen supports burning. ………………
5. Sound can travel only in air. …………….

Q4. Match the following:      (4)

‘A’	‘B’
1. Breeze	a. Moving air
2. Storm	b. Slow moving air
3. Smoke	c. Air with very high speed
4. Wind	d. Air with ash particles

Q5. Arrange the jumbled words given below in proper form:  (4)

1. DILLMWIN ………………..
2. YNOGXE ……………….
3. TUDS ………………..
4. MESKO ………………

Q6. What is the composition of air?            (2)

Q7. Which gas in the atmosphere is essential for respiration?       (2)

Q8. Why the transparent glass of windows, if not wiped off regularly, appears hazy?  (2)

Stars And The Solar System, Class 8 Science Chapter 17, CLASS TEST

 1. Morning star is the name given to    (1)

(a) pole star

(b) star Sirius

(c) planet Jupiter

(d) planet Venus

2. Which of the following figures depicts the position of pole star correctly?   (1)

3. Sun appears to move from east to west around the earth. This means that earth rotates from  (1)

(a) east to west

(b) west to east

(c) north to south

(d) west to north

4. An astronaut standing on the surface of the moon throws a ball upwards. The ball would  (1)

(a) directly fall down from the point it is released.

(b) hang in space.

(c) go up and then come back to the surface of the moon.

(d) keep going up never to come back.

5. Suppose a new planet is discovered between Uranus and Neptune. Its time period would be  (1)

(a) less than that of Neptune.

(b) more than that of Neptune.

(c) equal to that of Neptune or Uranus.

(d) less than that of Uranus.

6. The change in seasons on the earth occurs because   (1)

(a) the distance between the earth and the sun is not constant.

(b) the axis of rotation of the earth is parallel to the plane of its orbit.

(c) the axis of rotation of the earth is perpendicular to the plane of its orbit.

(d) the axis of rotation of the earth is tilted with respect to the plane of its orbit.

7. The first of a month is the new moon day. On fifteenth of the same month, which of the following figures would represent the phase of the moon?   (1)

8. Do stars emit light only during night?   (1)

9. Paheli and Boojho observe a bright object in the night sky which was not twinkling. Paheli says, it is a star and Boojho says it is a planet. Who is correct?  (1)

10. State whether the following statements are ‘True’ or ‘False’.  (3)

(a) The planet nearest to us is Jupiter.

(b) All the stars are at the same distance from us.

(c) The planets do not emit light of their own.

(d) The planets keep changing their position with respect to stars.

(e) The planet Venus appears in the eastern sky before sunrise.

(f) The plane in which the earth revolves around the sun is called the equatorial plane of earth.

11. Explain with a diagram of how you can locate pole star with the help of the constellation Great Bear (Ursa Major).  (3)

Garbage In, Garbage Out, Ch 16, class 6

 1. The method of preparing compost with the help of earthworms is called   (1)

(a) composting
(b) vermicomposting
(c) manuring
(d) decomposing

2. If you dump kitchen waste in a pit, it may, after sometime    (1)
(a) convert into compost
(b) convert into vermicompost
(c) remain as such
(d) remain forever in its dried form.

3. Which of the following activities does not reflect responsible behaviour with regard to waste disposal?   (1)
(a) Goods carried m paper bags or cloth bags.
(b) Waste collected in polythene bags for disposal.
(c) Waste separated into those that degrade and those that do not.
(d) Making handicrafts with used up notebooks.

4. Paheli gave the following ill effects of the practice of burning dried leaves and other plant parts.
(i) Burning degrades the soil.   (1)
(ii) Burning produces harmful gases/fumes.
(iii) Precious raw materials to obtain manure at a low cost is lost.
(iv) Lot of heat is generated unnecessarily.
The correct reasons of why we should not burn leaves are
(a) i, ii and iv only
(b) i, ii, iii and iv
(c) ii and iii only
(d) ii, iii and iv only.

5. A garbage collector separate items mentioned below in the garbage into red, green and blue containers for their transfer to landfill, composting pit, and recycling unit respectively.
Items:     (2)
(i) Plastic bags
(ii) Newspaper and journals
(iii) Screw and nuts
(iv) Vegetable peels
(v) Metal chips
(vi) Eggshells
Which item was transferred to which bin?

RED	GREEN	BLUE
(a)	(i) and (iv)	(ii) and (iii)	(v) and (vi)
(b)	(i) and (iii)	(ii) and (v)	(iv) and (vi)
(c)	(i), (iii) and (v)	(iv) and (vi)	(ii) only
(d)	(i) and (v)	(ii) and (iv)	(iii) only

6. The steps required for conversion of kitchen garbage into manure are given below in a jumbled form.                                                   (1)
(i) Put garbage in a pit.
(ii) Cover the bottom of the pit with sand.
(iii) Cover the pit loosely with a gunny bag or grass.
(iv) Add worms.                
Which of the following shows the correct sequence of the above steps?
(a) (ii); (i); (iii); (iv)
(b) (i); (ii); (iii); (iv)
(c) (ii); (iv); (i); (iii)
(d) (iv); (i); (ii); (iii)

7. Read the items mentioned in columns-l and II and fill in the related process in column III.  (3)

Column I	Column II	Column III
(a) Organic waste	Earthworms	(i) ……………
(b) Garbage	Dig pit and fill with garbage	(ii) ……………
(c) Old newspaper	Paper bags	(iii) ……………

8. Correct the definitions of certain terms given below by changing only one word.      (3)
(i) Compost: Substances converted into manure for use in industries.
(ii) Landfill: Garbage buried underwater in an area.
(iii) Recycling: Reuse of unused material in the same or another form.

9. Provide a suitable term that expresses the meaning of each of the following statements.     (2)
(a) Greeting cards made from newspaper.
(b) Contents of the waste bins.
(c) Worms converting certain kinds of waste into manure.
(d) An area where a lot of garbage is collected, spread out and covered with soil.

10.Put a tick (✓) against the garbage items given in Table 16.1 which could be converted into manure. Put a cross (X) against the others.                                (5)

	Garbage Items	Make manure or not
(i)	Eggshells
(ii)	Straw
(iii)	Dry flowers
(iv)	Pebbles
(v)	Broken pieces of glass
(vi)	Nails and screws
(vii)	Plastic bangles
(viii)	Leftover food
(ix)	Steel broken vessel
(x)	Dead animals