Unit Test- I
Based On chapters 1 to 4
5th Science(EVS-I) IMOPRTANT Q&A(Semi) for Unit Test-I
5th Science(EVS-I)IMOPRTANT Q&A(Semi) for Unit Test-I
Q.1. Who am I?
(a) You can see me from the earth but the lighted part of me that you see changes every day. - Moon
(b) I have my own light. It is only from me that the planets get light and heat. - Sun
(c) I turn around myself, around a planet and also around a star. - Satellite
(d) I turn around myself and revolve around the sun. - Planet
(e) No other planet has a living world like mine. - Earth
(f) I am the nearest star to the earth. - Sun
Q.2. Fill in the blanks.
(a) The motion of the earth around itself is called rotation.
(b) The motion of the earth around the sun is called revolution.
(c) The rotation of the earth gives rise to day and night.
Q.3. Give two examples of each.
(a) Weather-related events: 1. Fog 2.Storms 3. Rainfall
4. Formation of clouds
(b) Sources of water: 1. River 2. Ponds 3. Groundwater 4. Ocean 5. Rainwater 6. Glaciers.
(c) Continents: North America, South America, Europe, Africa, Asia, Australia, Antarctica.
(d) Oceans: Atlantic, Pacific, Arctic, Indian Ocean, Southern Ocean.
Q.4. In the following sentences, underline the words that refer to landforms.
(a) Anil lives at the foot of a hill.
(b) Ria lives in the plateau region.
(c) We can see many valleys near Mahabaleshwar.
1. Frog, kite, worm, snake, grass.
Grass ← worm ← Frog ← snake ← kite
2. Rat, eagle, plants, snake.
Plants ← rat ← snake ← eagle
Q.6. True or false?
(a) Micro-organisms form a part of the environment. -True
(b) It is necessary to maintain biodiversity. -True
(c) A grasshopper eats birds. -False
(d) When something is boiled, the micro-organisms in in it are destroyed. -True
(e) Our food does not get spoiled when micro-organisms begin to grow in it. -False
(f) Foodstuffs dried in summer cannot be used for the rest of the year. -False
(g) Foodstuffs get warmth when put in a fridge. -False
(h) There is only one method of farming. -False
(i) India is an agricultural country. -True
(j) Use of improved seeds does not lead to higher yields. -False
Q.7. Answer the following questions.
(a) What are the advantages of using improved seeds?
Answer: The benefits of improved seeds include:
· They give higher yield.
· They are resistant to pest attacks.
· They require less water supply.
(b) Which are the modern methods of irrigation? What are their advantages?
Answer: Drip irrigation and sprinkle irrigation are modern methods of irrigation. Due to modern methods of irrigation, the roots of the crops get enough water. One can save a lot of water through these methods. In modern methods of irrigation, full use is made of the available water.
(f) What causes the fertility of the soil to diminish?
Answer: Soil fertility decline occurs when the quantities of nutrients removed from the soil in harvested products exceed the quantities of nutrients being applied. In this situation, the nutrient requirements of the crop are met from soil reserves until these reserves cannot meet crop demands.
(h) What methods are used to preserve foodgrain?
Answer: To prevent damage by pests, chemicals are sprayed at the place of storage or all around it.
Neem leaves or some protective chemicals are mixed in the grain as their smell repels insects.
Storage places are kept dry and airy to prevent fungus formation.
(i) How is water made available for farming?
Answer: Irrigation water can come from groundwater, through springs or wells, surface water, through rivers, lakes, or reservoirs, or even other sources, such as treated wastewater or desalinated water.
(i) What are clouds made of?
Answer: Clouds are created when water vapor, an invisible gas, turns into liquid water droplets. These water droplets form on tiny particles, like dust, that are floating in the air.
(j) What are the foodstuffs obtained from the sea.
Answer: octopus, fish, shrimp, lobsters, mussels, scallops, oysters are obtained from sea.
(k) What are the different methods of preserving food?
Answer: Among the oldest methods of preservation are drying, refrigeration, and fermentation. Modern methods include canning, pasteurization, freezing, irradiation, and the addition of chemicals.
(l) Why do we avoid eating food that has got spoiled?
Answer: Spoilt food has a lot of harmful bacteria which are not good for our body. So, we should not consume such food.
(m) Why do we make jams from fruits?
Answer: Fruits are likely to spoil very easily and they do not stay in their natural and palatable form for a long period of time. So, in order to preserve them, food preservatives such as sugar are added to them. Thus, jams are made by using fruits.
(n) What are preservatives?
Answer: Food preservatives are substances that prevent food spoilage caused by microbial growth.
Food preservatives increase the shelf life of foods and help to control the growth of bacteria.
Sugar, table salt, vegetable oil, and sodium benzoate
are the most commonly used food preservatives.
(o) Find out the names of the different spices.
Answer: fennel seeds, Indian Bay Leaf, mustard seeds, cardamom, Black pepper, Cinnamon, Cloves, Cumin seeds, ginger
(p) Which are the modern methods of irrigation?
Answer: Drip irrigation and sprinkle irrigation are modern methods of irrigation.
Q.8. Match the following.
'A' Group 'B' Group
(1) Grain stored in a damp place (a) Prevents growth of fungus on the grain
(2) Adding proper chemicals to the stored grain (b) Fungus attack
(3) Grain stored in dry air (c) Prevents insect infestation
Answer:
(1) Grain stored in a damp place - (b) Fungus attack
(2) Adding proper chemicals to the stored grain - (c) Prevents insect infestation
(3) Grain stored in dry air - (a) Prevents growth of fungus on the grain
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4. ENVIRONMENTAL BALANCE
Exercises
⚫ Can you Tell?
(1) Who eats birds?
Ans. Smaller birds are killed and eaten by bigger birds. Cats and snakes may also hunt the smaller birds. Man, also kills birds for food.
(2) What is the food of plants?
Ans. Water and minerals present in the soil is food for plants. Plants take up water and minerals from soil with the help of their roots. With the help of the sunlight, they use carbon dioxide from the air and prepare their own food. Through their leaves they absorb carbon dioxide. The green coloured pigment, chlorophyll present in the leaves helps in this process of photosynthesis to prepare their own food.
. Can you Tell?
(1) What is the deer's food?
Ans. Deer is a herbivorous animal. It eats grass. In search of green grass, they move about in the jungles. It also feeds on leaves and smaller herbs and shrubs.
(2) What is the food of the tiger?
Ans. Tiger is a carnivorous animal. It feeds by hunting on small prey. Flesh of these animals is food for the tiger.
1. What's the solution?
We have to remove insects from the grain without using insecticides.
Ans. (1) Let the grain dry in the sunlight. The harsh sunlight does not allow eggs and caterpillars to grow in the grain.
(2) Keep dried Neem leaves in the container in which the grains are stored. The Neem acts as a repellent for insects.
(3) Grains like beans are smeared with mud. The mud particles keep the weevils away from infesting the grains.
(4) The place where grain is stored should be cool and dry. It should be airy. The chances of insect infestations are less in such storage places.
· 2. Use your brain power!
Make up a food chain:
Frog, kite, worm, snake, grass.
Grass → worm → frog → snake → kite
3. Answer the following questions:
(a) What is a food chain? Give an example of it?
Ans. (1) One living thing is dependent on other living thing for the purpose of feeding.
Therefore, they are interconnected with each other like a chain. This relationship is called a food chain. (2) Plants prepare food with the help of sunlight. Leaves of this plant are nibbled by a caterpillar. Grasshoppers eat these caterpillars. Grasshoppers are eaten by sparrows. This is a food chain,
Sunlight→ Plants → Caterpillar → Grasshopper → Sparrow
(b) How is the balance in the environment maintained?
Ans. (1) In any environment, the food chains and food webs are present. (2) Due to his there are interactions among different types of living things. (3) Similarly, the non- living things too move in a cyclic manner in this environment. (4) Living and non-living things give and take different materials in water cycle, carbon dioxide-oxygen cycle, etc. 5) Microorganisms bring about decomposition in the soil and add required substances in the soil. (6) When all these cycles and interactions take place in an environment without any check, then there is balance in that environment.
4. What substances in the soil are useful for the growth of plants?
Ans. (1) Plants require water, minerals and other substances in the soil for their growth. (2) The substances formed due to decomposition of dead and decaying plant and animal material are very useful for plants. (3) These substances help in the rapid growth of plants.
5. Write whether the following statements are True or False:
(a) Microorganisms form a part of the environment. -True
(b) It is necessary to maintain biodiversity. -True
(c) A grasshopper eats birds. -False
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