CBSE Class 7 Science Water A Precious Resource MCQs

Water: A Precious Resource

Question. World water Day ids celebrated on ( )
(a) 22 nd March 
(b) 24 th March 
(c) 28 th February 
(d) 1 March

Answer:  A

Question. Out of the following which year is was observed as the International year of Fresh water ( )
(a) 2005
(b) 2003  
(c) 2006
(d) 2008

Answer:  B

Question. Water exists in ( )
(a) Three forms
(b) Two forms 
(c) Five forms
(d) No form

Answer:  A

Question. The solid form ,snow and ice, is present ___________of the earth ( )
(a) At the poles
(b) At the equator
(c) Present in the atmosphere of the earth
(d) In the oceans

Answer:  A

Question. The process of seeping of water into the ground is called ( ) 
(a) Infiltration  
(b) Aquifer
(c) Water table 
(d) Bawri

Answer:  A

Question. The process of ground water getting stored between the layers of hard rock below the water table is known as ( )
(a) Infiltration 
(b) Aquifer 
(c) Water table 
(d) Bawri

Answer:  B

Question. Depletion of water table is due to 
(a) Increase in population
(b) Industrial and Agricultural activities
(c) Scanty rainfall
(d) All of the above

Answer:  D

Question. ________allows the water to seep in easily ( ) 
(a) Pukka floor
(b) Grass lawn 
(c) Cement floor 
(d) Marble Floor

Answer:  B

Question. Activities which involve wastage of water are ( )
(a) Washing
(b) Using the taps which are Leaking 
(c) Bathing
(d) All of the above

Answer:  D

Question. The process of recharging the ground water using rain water is known as
(a) Water harvesting 
(b) Drip Irrigation
(c) Infiltration 
(d) Bawri

Answer:  A

Question. The earth appears to be ______in colour from space ( )
(a) Red
(b) Blue
(c) Green
(d) Violet

Answer:  B

Question. Which of the following inhibits the seepage of rainwater into ground?
(a) A pukka floor
(b) playground
(c) Grass lawn
(d) Forest land

Answer:  A

Question. People obtain ground water through:
(a) wells
(b) hand pump
(c) both (a) and (c)
(d) none of these

Answer:  C

Question. Steam is which form of water?
(a) solid
(b) liquid
(c) gas
(d) none of these

Answer:  C

Question. How many forms of water are there?
(a) Only one
(b) Only two
(c) Only three
(d) None of those

Answer:  C

Question. Water is found in
(a) solid form
(b) liquid form
(c) gaseous form
(d) all of these

Answer:  D

Question. Which year was observed as International Year of Fresh Water?
(a) 2003
(b) 2004
(c) 2006
(d) 2002

Answer:  A

Question. Which of the following is traditional way to conserve water?
(a) Tube wells
(b) Bawris
(c) Rainwater Harvesting
(d) None of these

Answer:  B

Question. On which of the following day is World Water Day observed
(a) 22 March
(b) 14 November
(c) 2 October
(d) 21 December

Answer:  A

Question. The ground water bearing layer of the earth which is below the water table is:
(a) water table
(b) sea level
(c) aquifer
(d) none of these

Answer:  C

Question. Addition of harmful substance in water leads to
(a) Algal bloom
(b) Microbial growth
(c) High oxygen demand
(d) Water pollution

Answer:  D

Question. Water from which of the following sources is clean and safe to drink?
(a) Groundwater
(b) Lake water
(c) River water
(d) Ocean water

Answer:  A

Question. The gases surrounding the earth is:
(a) hydrosphere
(b) atmosphere
(c) lithosphere
(d) none of these

Answer:  B

Question. In which season water scarcity is most acute?
(a) Summer season
(b) Winter season
(c) Rainy season
(d) Autumn season

Answer:  A

Question. Which Of The Following Statement Is Or Are Correct?
(a) Water is essential for the existence of life.
(b) Without water, there would be no living things on the earth.
(c) Actually about 71% of the earth’s surface is covered with water.
(d) All the above

Answer:  D

Question. Select the one that is incorrect for vermin processing toilet.
(a) It is a new method arid has been recently tested in India.
(b) It is a novel, low water use toilet that is safe for processing of human waste
(c) In it the human excreta is treated by round worms and cockroaches
(d) In if the human excreta is completely converted to vermi-cakes

Answer:  C

Question. The large well like structure which is used in olden times for rainwater harvesting is called
(a) well
(b) bawris
(c) johad
(d) check-dams

Answer:  B

Question. There is acute water shortage due to
(a) Overuse and misuse
(b) Climate change
(c) Global warming
(d) Excess evaporation

Answer:  A

Question. The water bearing layer of the earth is called
(a) conifer
(b) hydrosphere
(c) aquifer
(d) water table

Answer:  C

Question. Seas and oceans are full of water on earth. However a very small percentage of water present on earth is available for us. This percentage is roughly.
(a) 0.006%
(b) 0.06%
(c) 0.6%
(d) 6%

Answer:  A

Question. Water is chlorinated to
(a) Kill germs
(b) Change colour
(c) Soften it
(d) Improve its taste

Answer:  A

Question. Which one of the following is the cause of the depletion of water table?
(a) Increasing population
(b) Agricultural activities
(c) Increasing industries
(d) All of these

Answer:  D

Question. Raj has to measure the volume of the jug shown using the measuring cylinder. The jug is heavy but delicate. What is the FIRST STEP he should take?

(a) Fill only the measuring cylinder to the brim from the tap.
(b) Fill only the measuring cylinder to its marked capacity from the tap.
(c) Fill only the jug to the brim with water.
(d) Fill the jug to the brim and the measuring cylinder to its marked capacity.

Answer:  B

Question. Carefully study the device shown alongside. It can probably be used for:

(a) drawing water from a lake
(b) peeling the skin of a potato
(c) drilling a hole in a wall
(d) opening a sealed tin

Answer:  A

Question. Given below are the ball-and-stick models of a few molecules. Which one of them represents a water molecule?

Answer:  B

Question. Identify the gas to fill in the blank in the block diagram given here

(a) Nitrogen
(b) Oxygen
(c) Carbon dioxide
(d) Water vapor

Answer:  A

Question. Which organism corresponds to the alphabet 'Q'?
Study the table and food chain given below and answer the question. Plankton are small plants that float in the sea. Seaweed are plants that grow in the sea or sea bed.

(a) Mussel
(b) Lobster
(c) Seal
(d) Mullet

Answer:  B

Question. If the organism represented by 'Z' decreases, what will be the immediate consequence?
Study the table and food chain given below and answer the question. Plankton are small plants that float in the sea. Seaweed are plants that grow in the sea or sea bed.

(a) Periwinkles will increase.
(b) Mullets will increase.
(c) Seals will increase.
(d) Limpets will increase.

Answer:  B

Question. Which of these is UNLIKELY to result in a reduction in wildlife in a region
(a) pollution in the region
(b) deforestation in the region
(c) a new factory in the forest
(d) heavy monsoon rains

Answer:  D

Question. Zaheeda put the following items into a big polythene bag. She took each of them out after two weeks. She made a table and put them under heads as Decomposed and Not decomposed'. Which item(s) have been put under incorrect headings?

(a) Stainless steel vessel only
(b) Grass only
(c) Both tin can and cucumber
(d) Both key chain and bread

Answer:  C

Question. If a mineral is defined as follows:
Which of the following is a mineral?

(a) Coal
(b) kerosene
(c) Glass 
(d) Diamond

Answer:  D

Question. Organisms are classified into kingdoms, phyla, classes, orders, families, genera and species. Which among them would be common to animals from groups P and Q shown here?

(a) kingdom, phylum
(b) kingdom, phylum, class
(c) kingdom, phylum, class, order
(d) kingdom, phylum, class, order, family

Answer:  B

Question. Which highly toxic pollutant is emitted due to the incomplete combustion of petrol in a car?
(a) Carbon dioxide
(b) Sulphur dioxide
(c) Ozone
(d) Carbon monoxide

Answer:  D

Question. In a rain forest, the thick forest canopy restricts the amount of sunlight reaching plants at the lower levels. Which of these characteristics might help a plant at the lower level survive in a rainforest?
(a) Bright flowers
(b) Large leaves
(c) Short stems
(d) Long roots

Answer:  B

Question. Why is the size of each level of the pyramid much bigger than the level above it?
Study the pyramid shown below and answer the question. It shows the feeding relationships within a food chain

(a) The energy required by an individual organism is higher at the lower levels.
(b) The number of organisms at a given level is more at the lower levels.
(c) The average size of an organism is higher at the lower levels.
(d) This is just an artistic representation - there is no specific reason for it

Answer:  B

Question. At which level in this pyramid would one find organisms capable of preparing their own food?
Study the pyramid shown below and answer the question. It shows the feeding relationships within a food chain

(a) Level 1
(b) Level 2
(c) Level 3
(d) Level 4

Answer:  A

Question. If the number of crickets in this food web was to reduce drastically, the most likely result will be_________________.

(a) more competition between frogs
(b) an increase in the number of frogs
(c) a decrease in available grain
(d) a decrease in the number of mice

Answer:  A