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প্রাথমিক শিক্ষা সমাপনি পরীক্ষা Elementary Science's Short Questions(M.C.Q), Class 5 (P.E.C.)

                    Science (Chapter-1-5)
Written by : Mohammad Arif Mohiuddin               Phone : 01553516901
Chapter _ 1
1)     What are the two kinds of environment?
Ans: Biotic environment and abiotic environment.
2)     By which environment biotic environment is influenced?
Ans: Abiotic environment.
3)     Which are the elements of abiotic environment?
Ans: The abiotic environment includes hills, ponds, rivers, sea, towns and villages etc.
4)     Which are the elements of biotic environment?
Ans: Plants, animals, birds, micro-organisms etc.
5)     Which influence the lives of animals and plants in many ways?
Ans: The sunlight, air, water, heat, soil etc. influence the lives of animals and plants in many ways.
6)     Which cannot survive without air or water?
Ans: Plants and animals.
7)     Which depend on each other?
Ans: Plants and animals.
8)     Which contain green pigments?
Ans: Leaves of plants.
9)     What is chlorophyll?
Ans: The leaves of plants contain green pugments.These pigments are known as chlorophyll.
10)Which helps in food production of crops?
Ans: Chlorophyll
11)What is photosynthesis?
Ans: The process in which plants in presence of light and water produce food with the help of chlorophyll is called photosynthesis.
12)Why plants use foods?
Ans: Plants use foods for their survival.
13)What does the plants intake and release?
Ans: Plants intake carbon-di-oxide and release oxygen.
14)What does the animals intake and release?
Ans: The animals intake oxygen and release carbon-di-oxide.
15)All animals release excreta.
16)The pollination of plants is dependent upon insects, birds etc.
17)Plants and animals are interdependent for survival.
18)Which is the source of energy?’
Ans: The sun
19)The green plants produce food by the process of photosynthesis.
20)There is immense need for conservation of plants and animals.

                     Chapter-2
                                               
21)What is called environmental pollution?
Ans: we use environment in various various ways to survive in this world. As a result the environment got changed. When these changes become harmful for us we call them, “environmental pollution.”
22)What is the impact of air pollution?
Ans: Air pollution has impact on the human health.
23)Pesticides are used in crops.
24) Why air becomes polluted?
Ans: The air becomes polluted due to unplanned housing and industry establishment, vehicle emission, smoke from brick fields etc.
25)By suing polluted water people are exposed to water-borne disease.
26)Which cause soil pollution?
Ans: Use of excess fertilizers and pesticides in the agricultural land causes soil pollution.
27)Soil pollution causes loss of productivity of soil.
28)Healthy environment is necessary for the survival of human and living beings.
29)Who are affected by various diseases?
Ans: Slum dwellers
30)Why the conservation of forest is important?
Ans: To protect the environment.
31)Why mass public awareness should be created?
Ans: Mass public awareness should be created to conserve environment.

                     Chapter-3

32)We cannot live without water.
33)How plants get water and nutrition?
Ans: Plants get water and nutrition from soil.
34)Which is used as a median for digestion?
Ans: When we eat food,water is used as a median for digestion
35)Water is essential to maintain the proper temperature of our body.
36)Water is obtained from different sources.
37)What is hail?
Ans: When the water particles in the cloud become extremely cold, the particles turn into ice and falls down on earth as hails.
38)Rain water flows on over the soil and mixes with river water.
39)River water flows on and falls into the sea water.
40)Water moves on earth from one source to another source in cycles.
41)How water vapour reach to the mountain peaks?
Ans: Water vapour reach to the mountain peaks as clouds.
42)Why in summer the ice melts?
Ans: In summer the ice melts into water due to the heat of the sun.
43)What is called water cycle?
Ans: The cyclic order in which water returns back is called a water cycle.
44)  Which colour is used to mark the tube well with arsenic?
Ans: red colour
45)There is mineral of Arsenic down in the earth.
46)Which diseases are occurred due to polluted water?
Ans: Cholera,dysentery,typhoid and diarrhea.
47)What is called arsenicosis?
Ans: Drinking of Arsenic polluted water for a long time causes a kind of disease or scar in the hands and legs called arsenicosis.
48)We need to drink and use safe water for a healthy living.
49)Water needs to be boiled to make it fully free from germs.
50)What is sedimentation?
Ans: The process of separating clean water from river’s or pond’s water is called sedimentation.

                    Chapter-4
51)Air surrounds us from all sides.
52)What is called atmosphere?
Ans: The air that surrounds us is called atmosphere.
53)Air is an important element of environment.
54)What contain air?
Ans: Air contains nitrogen, oxygen, carbon di oxide and water vapours.
55)Which gas breaks down the foods we eat?
Ans: Oxygen breaks down the foods we eat and creates energy.
56)Which keeps our body warm?
Ans: Energy keeps our body warm.
57)Fish lives on taking oxygen from the air contained in water.
58)We cannot make fire without oxygen.
59)How we cook our foods?
Ans: We cook our foods and boil water using fire.
60)What is it in the wheels of bicycles, rickshaws and cars?
Ans: There is air in the wheels of bicycles, rickshaws and cars.
61)Patients with breathing problems are given oxygen from cylinders.
62)There is less oxygen on peaks of mountain.
63)Which is used to produce urea?
Ans: Nitrogen of air is used to produce urea.
64) Which gas is used to preserve food?
Ans: Nitrogen                                             
65)Carbon dioxide is mixed under high pressure with soft drink of the bottle.This gives a sharp taste.
66)Carbon-di-oxide is heavier than air.
67)The airflow of air is used to rotate big wheels or turbines to generate electricity.
68)Which absorbs heat?
Ans: Flow of air
69)Air is very useful to us.
70)What is called air pollution?
Ans: The change in the natural composition of air is called air pollution.
71)A hearth or a cooker is another source of producing carbon monoxide.
72)How air becomes polluted?
Ans: Air becomes polluted if carbon dioxide increases in the air.
73)Which are the reasons behind the increasing of carbon-di-oxide?
Ans: The burning of coal, petroleum and natural gas is the reason of carbon di-oxide in the air.
74)When coal is burnt what is produced?
Ans: Sulphur di-oxide
75)When a patient of tuberculosis or pox sneezes or coughs he also spreads germs into the air and pollutes it.

                     Chapter- 5
76)Which is the cause or agent of changes?
Ans: Energy
77)Which are the two important concepts for describing natural events?
Ans: Two concepts: matter and energy.
78)What is matter?
Ans: The thing which cover space and which has weight and occupy a space is called a matter.
79)Heat, light, sound, electricity all these has no weights.
80)Matter may be of different forms and may have different states.
81)Which cannot be created or destroyed?
Ans: Energy
82)Energy is changes only from one state to another.
83)Why energy is applied to a body?
Ans: Energy is applied on a body to increase its speed or temperature.
84)What is called energy?
Ans: The capacity to do work is called energy.
85)Energy has different forms and different forms.
86)From where we get heat and light?
Ans: From sun
87)What is solar energy?
Ans: The energy which we get from the sunlight is called solar energy.
88)Which is an important energy in modern civilization?
Ans: Electricity
89)Sound is a kind of energy.
90)Industries use electric motors to do different works.
91)How we listen to music?
Ans: We listen to music through sound energy.
92)The current of water is used to generate electricity.
93)When coal or wood is burnt to produce heat,chemical energy transforms into heat energy.
94)The heat energy transform into kinetic energy.
95)What is called nuclear energy?
Ans: the energy which sun creates is called nuclear energy.
96)Heat is transferred from a high temperature zone to low temperature zone in three process.Such as: conduction,convection and radiation
97)How light is transmitted?
Ans: Light is transmitted through radiation.


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