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WorksheetsSCIENCE_CHAP_1&2
Total questions: 25
Worksheet time: 13mins
Name the process of irrigation used in the picture.
Chain pump
Moat
Dekli
Rahat
The instrument COMBINE is used for ______________.
Sowing of seeds
Harvesting of crops
Threshing
Both threshing and harvesting.
Bacteria and Fungi are both used for
Manufacturing of different antibiotics
Preparing yogurt
Fermentation
All the above
Which of the following is an example of fertilizer?
2,4-D
Compost
Potash
Soda lime
What is the name of the nitrogen-fixing bacteria which is available in the roots of plants?
Blue green algae
Nitrosomonas
Azotobacter
Rhizobium
Farmers adopt many ways to remove weed and control their growth. Choose the incorrect one.
Tilling before sowing of crops help the killing of weeds.
Removal of weeds is done before they produce flowers and seeds.
Weeds are also controlled by using certain chemicals.
Weedicides are sprayed during the vegetative growth of weeds after flowering and seed formation.
Boojho Wants To Know Which Of The Following Statement Is Or Are Incorrect?
Housefly Carries the parasite inside its body.
Aedes mosquito carries the plasmodium parasite of malaria.
Anopheles is an example of Housefly.
All the above
A good seed will always __________ in water
Float in water.
Sink in water.
Dissolve in water.
React with water.
What are the important steps in the preparation of soil?
Loosening and sowing
Loosening and weeding
Turning and sowing
Turning and loosening
Which of the following diseases can be cured using antibiotics?
Mumps
Dengue
Typhoid
Common Cold
Which of the following nutrients replenishes after growing leguminous plants?
Oxygen
Nitrogen
Phosphorus
Potassium
Following is the example of
Algae
Fungi
Bacteria
Protozoa
Which among the following statements is not associated with food preservation?
Prevention of decay or spoilage
Decreased shelf life
Air-tight sealing
Storage for future use
Complete the following table:
(i)Bacteria (ii)Air (iii)Virus (iv) Air/Contact
(i)Protozoa (ii)Air (iii)Virus (iv) Water
(i)Bacteria (ii)Contact (iii)Fungi (iv) Air/Contact
(i)Protozoa (ii)Contact (iii)Bacteria (iv) Water
Match the Column:
1-C, 2-B, 3-A, 4-D
1-B, 2-C, 3-D, 4-A
1-D, 2-C, 3-A, 4-B
1-A, 2-B, 3-D, 4-C
Choose the incorrect statement.
Protozoa are a group singled-celled microorganism.
Amoeba is an example of protozoa.
Amoeba is a protozoan which causes a disease known as malaria in humans.
Can we say that protozoan is classified as plants.
Above is the picture of Yellow vein mosaic of bhindi. Which microorganism causes it and what is its mode of transmission?
Virus, Seed
Bacteria, insect
Virus, Insect
Bacteria, air
Following is the list some climatic data of an area:
1. Heavy rainfall
2. High humidity
3. High average temperature.
Which crop can be sown in such conditions?
Gram
Wheat
Maize
Mustard
A farmer after sowing the seeds adds manure to his field. What should be the immediate
next agricultural practice after addition of manure and fertilizers?
Irrigation of soil
Storage of crops
Preparation of soil
Harvesting of crops
Ritika observes that her father before storing the grains always dries them under the Sun.
What is the likely reason for this activity?
to keep the grains warm
to prepare the grains for germination
to increase the size of the grains
to reduce the moisture content of the grains
What makes viruses different from the bacteria?
microscopic size
requirement of moist conditions
dependency on living cells
requirement of food
Some nitrogen fixing bacteria help increase the fertility. This makes the soil more productive. What activity of bacteria helps make soil more productive?
Supplying compounds of nitrogen to the plant roots.
Taking up nitrogen from the air and converting it into compounds of nitrogen.
Breaking down compounds of nitrogen to release nitrogen gas.
Breaking down nitrogen rich waste into nitrogen gas.
Ridha observed that fishes were coated with salt and kept in tray in the fish market. What is the likely use ofcoating fish with salt?
It increases the moisture content of the fish allowing it to survive longer.
It increases the salt content of the fish that enhances its taste.
It reduces the weight of the fish making the transport easier.
It stops the growth of bacteria by reducing the moisture content.
What is true about the communicable disease ‘dengue’?
It occurs due to male Anopheles mosquitoes that act as carrier of dengue virus.
It occurs due to male Aedes mosquitoes that act as carrier of dengue virus.
It occurs due to female Aedes mosquitoes that act as carrier of dengue virus.
It occurs due to female Anopheles mosquitoes that act as carrier of dengue virus.
A farmer wishes to use a tool for sowing seeds that protects the seed from being consumed by animals. Which type of tool should the farmer choose?
seed drill as it coats a chemical above the seeds
traditional tool as many seeds are sown together
seed drill as it covers the seeds with soil after sowing
traditional tool as seeds passes through a funnel-shape tube
