Ponder over it: In our India to increase in food grain production Dr M. S. Swaminathan started green revolution In 1963. In agriculture high-yielding wheat seeds were introduced in India. Also, modern farming methods began to be used at large scale in India. So He is known as the 'Father of the Green Revolution in India.
Choose the correct option
2. The ________is an edible part of potato plant
(a) leaf (b) root (c) sternÖ (d) fruit
3 We can sprout seeds in __________
(a) rocks (b) waterÖ (c) oil (d) none of these
4. The sprouted seeds contain more
(a) carbohydrates (b) fats (c) vitamins Ö (d) water
5. The edible part of the apple plant is ___
(a) leaf (b) root (c)Stem (d) fruit Ö
6. we eat root of _______
(a) mustard (b) rajma (c) chili (d) radishÖ
7. The colour of the structures grown out from the sprouted seeds is
(a) black (b) whiteÖ (c) red (d) green
Fill in the blanks:
1. We get sugar from _Sugarcane________
2. We get milk from __Cow ____ and ___buffalo______.
3. Honeybees store honey in their ___ honey stomach _________.
4. _Rice __ and ___water___are two ingredients of boiled rice.
5. Animals that eat both plant products and flesh of other animals are called
6. Bacteria and fungi are called ____ decompose ____.
7. We should not ___waste_ food in any way.
8. Honeybees are kept in __ beehive ___ for rearing.
Very Short Answer Questions:
1. What are the animals that eat only plants and plant products called?
2. Name four food items we get from animals.
Ans: Egg, Meat, milk, Ghee
3. Name two edible stems.
Ans: Potato , sugarcane
4. What are the materials needed to prepare food items called?
5. What is the rearing of honeybees on a large scale called?
6. Name two plants whose flowers are eaten as vegetable.
Ans: Cauliflower, Braccoli
Short Answer Questions:
1. Why do we need food?
Ans: We need food
(i) to get energy
(ii) grow and replace worn out cell
(iii) protect body from diseases
2. What are edible parts? Give name of one.
Ans: Part of plants that are eaten by humans is called edible parts. Wheat, pea and rice
are plant whose edible part is seed
3. Honeybees work hard to collect nectar from flowers.
(a) Where is this nectar stored? (b) What value do you learn from honeybees?
Ans (a) bee hive (bee stomach) (b) Hard work is key of success.
4. How can food problem be solved? Give two ways.
Ans: Food problems be solved by (i) Avoid wastage of food (ii) Using modern technology
and best practices in agriculture
5. How are scavengers and decomposers useful to us ?
Ans: scavengers and decomposers feed on dead plants and animal. In this way they
decompose waste and keep our environment clean and enrich nutrients in soil.
6. What Is food chain? Give one example.
Ans: One who eats what in the environment is called food chain. Eg. Grass -> Zebra-
F. Long Answer questions:
1. How will you sprout seeds?
Ans: At first wash the seeds in water, drain the water. Keep seeds in bowl and cover it
with a wet cloth and leave them for another day. The next day, you will see the seeds have sprouted.
2. Distinguish between (a) herbivores and carnivores (b) scavengers and decomposers
Ans: (a) Animals which eat only plants or plant products are called herbivores eg cow,
goat. Animals which eat flesh of other animals are called carnivores eg lion, Tiger.
(b) An animal that feeds on dead organisms or by hunting live prey is called scavengers.
Eg. Vultures, hyenas, and wolves . They help break down or reduce organic material into
smaller pieces. These smaller pieces are then eaten by other organism called
decomposers eg, earthworm, fungi, bacteria.
HOTS (Higher Order Thinking Skills) questions:
1.Your mother makes food In the kitchen. Is she a 'producer'? Why/Why not?
Ans: No. My mother is not a producer as she uses ingredients obtain from plants
Solve the following crossword puzzle:
1. animals that eat both plants and flesh of other animals
2. Rearing of honeybees on a large scale is called
3. the materials needed to prepare food items
4. a tasty and nutritious food item we get from honeybees
5. the parts of the plant which can be eaten are called parts
Ans: edible part
 Fill in the blanks :- [Practice Questions For Chapter: Air around Us ]
1. Air occupies _________________________.
2. Harmful gases and smoke in the air causes _________________________.
3. The _______________________ and ______________________ within the nasal passage prevents entry of dust particles into our respiratory system.
4. Air helps in _________________________ of sound.
6. Air is really not one substance but a __________________.
7. The component of air that supports burning is called ________________.
8. The aquatic animals use dissolved Oxygen in water for respiration, this is possible because Oxygen ________________ in water.
9. Nitrogen of the air is used on a large scale to manufacture ________________.
10. ________________ is the place in nature for gaseous exchange.
 Choose the correct answer :-
1. The height of the atmosphere is (120 km/240km)
2. The volume of oxygen (increases/decreases) with increase in altitudes.
3. (Carbondioxide/Oxygen) is taken in by the plants for photosynthesis.
4. Air contain approximately (78 percent/80 percent) of Nitrogen.
 II. True or False statements :
1. Air is a compound but not an element.
2. Air is an opaque material.
3. Air contains water vapour.
4. The major part of air is Nitrogen.
5. Plants produce Oxygen through photosynthesis.
 Name the following :-
1. The two scientists who proved air is a mixture of gases :
2. The lightest gas in the air.
3. The gas essential for combustion and respiration.
4. The substance in presence of which photosynthesis takes place :
 Define the following :-
Answer these Questions
1. How do earthworms increase fertility of soil?
2. Rag pickers always suffer from diseases why?
3. Why does composting of leaves better than burning them?
4. Why should plastic food containers be avoided?
5. Why we should not throw away any things that can be recycled?
6. Why recycled plastic are not recommended for storing food in?
8. What is waste management and why it is so important?
9. Which garden worm generally used for Vermi composting.
10. Why worm box aerated in the process of vermi composting?
11. Fill in the blanks:
a ._______ is generated in homes, industries, agricultural fields and in other human activities. This is called _______.
b. Sewage is a liquid waste which causes ______ and ____ pollution.
c. Wastewater is treated in _______ treatment plant.
d. By-products of wastewater treatment are ______ and _______.
e. ________ of water can be removed by boiling it or treating it with washing soda.
f. Cleaning of waste water is commonly known as ________.
Ans: a. waste water sewage. b. water, soil. c. sewage. d. sludge, biogas. e. hardness. f. sewage treatment.
Class 6th Chapter-Waste (Garbage In, Garbage Out )... View
Class VI LESSON: ELECTRICITY AND CIRCUIT MCQ’S
Choose the correct answer from the bracket.
1. In electric bells electric energy transform in to ____________energy.
(a)Mechanical energy (b) Magnetic energy (c) Sound energy (d) Light energy
2. ----------- is the positive terminal of an electric cell.
(a) Metal disc (b) Metal case (c) Metal cap (d) Metal base
3.The tiny coiled metal wire present inside the bulb is called____________.
(a) Element (b) Conductor (c) Filament (d) None of these
4. A combination of two or more electric cells is called___________.
(a) Electric circuit (b) Battery (c) Terminals (d) None of these
5. An electric bulb has ____________terminals.
(a) 3 (b) 4 (c) 1 (d) 2
6 ----------- is an electric device which easily closes or opens an electric circuit.
(a) Filament (b) Electric bulb (c) Electric switch (d) Electric cell
7. A material which does not allow the electricity to pass through it is___________.
(a) Conductor (b) Electric cell (c) Insulator (d) None of these.
8. Non metals like __________and __________are conductors of electricity.
(a)Wood and paper (b) Graphite and gas carbon (c) Glass and rubber (d) None of theses
9. A material which allows the electricity to pass through it is ________.
(a) conductor (b) Insulator (c) Transistor (d) None of these
10. Electric energy is produced from the____________ within the cell.
(a) Chemicals (b) Metals (c) Terminals (d) None of these
ANSWER KEY FOR ELECTRICITY & CIRCUITS
1)B 2)C 3)C 4)B 5)D 6)C 7)C 8)B 9)A 10)A
Visit given links for further study:Solved Questions 1 to 10 visit link:
Solved Questions 11 to 21 visit link:
6th Electricity and Circuit CBSE Test paper-1
6th Electricity and Circuit CBSE Test paper-2
1. Describe at least three rules of measuring length correctly.
Ans: a. The scale that you are using to measure the object must be greater than the length of the object.
b. The eye should be placed just above the points that you are reading otherwise there will be error due to parallax.
c. If the zero mark of the scale is damaged or edge of scale is not smooth, then start measuring from another mark.
2. Name two devices used to measure length.
Ans: The two devices that can be used to measure length are:- Metre scale ad Screw gauge.
3. Describe the correct method of measurement of length.
Ans: (i) we must choose a suitable device for measuring the length of an object, like measuring scale
(ii) we should place the scale in contact with an object along its length and align the zero mark of the scale with the starting position of the object.
(iii) While taking the reading, eye must be placed vertically above the point where the measurements have to be taken; otherwise there will be an error in the reading which is taken due to parallex.
(iv) if the zero mark on the scale is damaged, then start the measurement from another mark.
4. Circle odd one
(a)Table; fan; falling stone; Parked car
(b)Bee ; butterfly; Grazing Cow; Sleepy Donkey
(c)Pendulum; Earth revolving around the Sun; Moon revolving around the earth; Bee revolving on flowers
(d)Moving fan; merry go round; A bus moving on road; a stone moving along circular track
Ans: (a) falling stone (b) Sleepy Donkey (c) Bee revolving on flowers (d) A bus moving on road
5.Fill in the blanks
1.One meter is --------------cm
2.one centimeter is -----------------mm
3. Four km is ---------m
4. The motion of moving bicycle is ----------------
5. The motion of drill machine is ----------
6. Motion of child on swing -------------
7. The motion of a top is ----------
Ans: 1. 100 2. 10 3. 4000 4. Rectilinear 5. rotatory 6. oscillatory
6. Say true or false
(a)Rectilinear and curvilinear cannot happen at the same time
(b)Rupa can move in rectilinear and rotationary motion at the same time
(c)A child on swing has only circular motion
(d) Periodic motion is always rectilinear
(e) A foot step is used as a standard unit of length.
Ans: (a)False (b)True (c) False (d) False (e)False
1. Can an object be in motion and rest simultaneously for different observer? Give an example and consequence?
Ans: Yes. A person driving a car is in rest with respect to other person in car but in motion with respect to a person standing road side. Tate of motion and rest depend on the observer or a fix point called reference point.
2. Can a body be in translational and rotational motion? Give some examples
Ans: yes, combination of translation and rotation is rolling motion like the motion of the wheel , the motion of the earth, drilling.
3. Why do we need standard unit of measurements for a quantity?
Ans: The unit used like hand span ,foot, cubit differ from person to person or even in different countries so for a uniform measurement we need standard unit of measurements.
4. Is it correct to say all periodic motion are oscillatory motion and all oscillatory motion are periodic. Give reason for answer?
Ans: In oscillatory motion body repeat its action in equal interval of time so, all periodic motion are oscillatory motion and vice versa. For example motion of swing, pendulum, motion of earth on its axis.
Post related to this chapter:
Short Questions and Solution : Motion and Measurement of Distances
Long Questions and Solution : Motion and Measurement of Distances
VI 6th Science Assignments:: CH-6 Measurement and Motion
Fill in the blanks : Chapter:Habitat
(i)In the sea plants and animal surrounded by -------------------------(saline water)
(ii) The place where living beings live is called their -------------(Habitat)
(iii) In Cactus plant, ---------------are reduced to spines (Leaves)
(iv) Global warming increases the concentration of ------in the atmosphere(carbon dioxide)
(v) ------------are examples for Decomposers (Bacteria and fungus)
(vi) Living component of a habitat is called as -------------- (Biotic)
(vii) Anything which produce and response in an organism is called as -----------(Stimulus)
(viii) A potted plant is kept in a card board box with a small slit of sun light exhibits ----- Movement (Phototrophic)
(25 questions total)
The surroundings where organisms live naturally are called its habitat.
Plants and animals have special features that help them to survive in their own habitat
Habitat can be terrestrial or aquatic.
Terrestrial habitat: the land where all plants and animals survive is called territorial habitat .For example: deserts, forests and grasslands, as well as coastal and mountain regions. Camels and cactus plants live in deserts only.
Aquatic habitat: The water where plants and animals survive is known as aquatic habitat like rivers, ponds, lakes, ocean and swamps. For example, fish live in water.
Adaptation: Plants and animals develop certain habits that help them survive in their surroundings, and this is known as adaption.
Acclimatization: The small adjustments by the body to overcome small changes in the surrounding atmosphere for a short period of time are called acclimatization.
Biotic and Abiotic components: These are living and non living components of a habitat .
Biotic components include all the livings organisms in a habitat like plants and animals .it is further classified into producers ,consumers , scavengers’ and decompose
Abiotic components include all the non-living things in a habitat like air, water, soil, sunlight and heat.
Q. What is the name for food producer?
Q. Is desert habitat terrestrial or aquatic?
Q. What is the term used to describe the response of plant and animals to light?
Ans: Photo tropism
Q. What we name the Plants growing in dry desert area ?
Q. What is decomposer?
Ans: Organism that feed on the dead and decay remains of plants and animal is called decomposer. Eg. Microorganism like bacteria and fungi.
Q. How are decomposes helpful to us?
Ans: Decomposer help to break down dead plants and animal into organic matter that increase fertility of soil .
Q. What are scavengers?
Ans: Living organism feed on dead animals helps to clean environment are called scavengers like vulture, crow , jackal etc.
Q. What type of consumer are carnivores?
Ans: Secondary consumer as the feed indirectly on plants for example tiger , lions, wolves etc
Q. State any two flight adaptation seen in areal animals?
Ans: Two flight adaptations seen in areal animals are: (a) Body modified like boat to minimize air resistance
(b) The limbs are modified into wings
Q. Define: (a) Epiphytes (b) Pneumatic bones (c) Nictitating membrane
Ans: (a) Roots of some plants like Spanish moss and some fern grow on other plants or tree to get sunlight is known as Epiphytes.
(b)The animals that can fly have hollow bones that are called Pneumatic bones. Like bones of birds
(c) The membrane that protect eyes of fish under water is called Pneumatic bones
Q. What are the adoptation seen in desert plants?
Ans: The adaptations seen in desert animals are:
(a) Store extra water in their body
(b) Lives in deep borrow
(c) Try to avoid body contact with hot ground
(d) Having long eye lash to protect eyes from sand
Q. How does temperature affect plants and animals?
Ans: Temperature affects the structure of leaves and stem of plants. Temperature affects the colouration of some birds and animals. Temperature also affects the size and body parts of animals.
Q. Biotic and abiotic component are dependants on each other Explain?
Ans: Animals depends on plants for food. Plants depend on light, air, soil and water for preparation of food. Therefore, biotic components directly or indirectly depend on abiotic components. Decomposers break down dead biotic components into organic matter that enrich soil. Photosynthesis help to maintain balance of gases in air and water in nature.
Q.What we call the plants that grow in moist habitat?
Q. what is the meaning of oviparous and viviparous
Ans: Oviparous are those animals which lay eggs example- crow, lizard where as viviparous are those animals which do not lay eggs and give birth to young ones for example- lion, dog.
Q. How is a cactus adapted to survive in a desert?
Ans: Cactus has a waxy surface with lots of water in it. it also has thorns to prevent loss of water. This is how it lives in the desert. it also lives just because of its thick fleshy stem.
Q. What is acclimisation?
Ans: The small problems some time occur in the body of organism over short period , The process of overcoming small changes in the surroundings is called acclimisation.
Q. How do plants and animals adapt themselves?
Ans: Plants and animals adapt themselves to different surroundings with the help of adaptive features they have. For Example: Presence of wings, flight muscles and a stream-lined body helps birds in flight. Birds also have hallow bones that make their body light. Presence of fur on the body of the polar bear which protects it from the cold temperature.
Q. Write two adaptive features in frog which help them to stay both of them water and land.
Ans: Frogs have moist skin for exchange of gases in water and they have lungs to breath in air
Q. Give reasons:
(a) Why are deep sea worms blind?
(b) Why are some marine creatures living in the deep sea give out light of there of own? (c) Why the upper surface of the leaves of lotus have a thick cuticle ?
Ans: a. As we move deep into seas and oceans the amount of light or the visibility decreases. Deep sea worms are blind because of the lack of requirement. Some worms have large eyes but those are not for the purpose of seeing. These worms have developed strong sense of smell to encounter these problems.
b. Since there is lack of light in deep seas, some organisms can give out light to assist them in finding their way in the dark. This also helps them in finding prey to feed on and can also be used to find a mating partner.
C. Lotus is an aquatic plant. The leaves of the lotus plant have a thick waxy cuticle that helps in repelling water and keeps the stomata open so that water transport occurs effectively in plant
Q. why do cockroaches hide their face when sunlight falls on them?
Ans: Cockroaches have some light receptors cells in their eyes which cannot tolerate the high intensity light. This is the reason why they run toward darker areas during sunlight.
Things, which do not grow, move, or respond are called non-living things.
Things that grow, breathe, and respond are called living things.
PROPERTIES OF LIVING THINGS
(a) All living things grow: Infant grows into a child, Plants grow from seeds, Puppies grow into dogs, and kittens grow into cats.
(b) All living things can move: Living things move from place to place in search of food iscalled Locomotion
(c) All living things need food to live: Living things eat food to get energy to live.
(d) All living things Respire: Living things eat and digest foods that get oxidized in body to release energy. This process is called Respiration. Respiration occurs inside body. Exchange of carbon dioxide and oxygen in living body is called breathing. Breathing occur outside the body. Plant breath through stomata and animal through nose. Small animal and microbes exchange gases by diffusion.
(e) All living things reproduce: Living things can produce young one of similar kinds. This process is called reproduction. Some animal give birth to young ones like dog, cow; Some animal lay eggs like bird, hen ; Plant grow from seeds ,stem and root etc.
(f) All living things respond: Living things can respond against touch, heat, light and gravity called stimulus. Change in our surrounding that make living things respond to them, are called stimuli. Touch me not plant show response to touch and its leaves hang down.
(g) All living things are made up of different kinds of cells. Group of cell is called tissue. Group of tissue is called organ. A group of organs is called organ system that work together to keep our body live.
(h) Living things excrete: Living Things throw waste outside body like sweat, urine, faeces. This process is called excretion. Plants excrete gum, leaves, latex etc
Q. What is habitat?
Answer: The surroundings where plants and animals live, is called their habitat. The presence of specific features, which enable a plant or an animal to live in particular habitat, is called adaptation.
Q. Which organism grow throw their lives
6th CBSE Science Material of Daily Use/Shorting of material into group
· The word material is related to things that are around us.
· Matter is any abject around us that occupy space and has mass
· Matter can found in around us in three state Solid , liquid and Gas
· In solid state, particles of matter are tightly packed and having no gap between them. Due to this reason Solid have definite shape and volume.
· In liquid state , particles of matter are loosely packed together have some space between then .due to this reason liquid have fix volume but no fix shape .
· In Gas particles of matter are far from each other due to this gas have no fix volume and shape.
· Both liquid and gas are called fluids as they can flow due to weak force of molecular attraction between particles.
· We have large numbers of material around us and we need to know about their properties. To make study of the nature of different substance easy we have to divide it into group.
· Shorting of material into group on the basis of similarity of different substance is called Classification.
· Material around us classified on the basis of their properties:
(a) Appearance or luster
(b) Hardness or softness
(f) Conductivity of heat and light
Q. What is luster?
Ans: Materials around us have a particular type of shine called Luster like gold, silver, aluminum etc
Q. Some metal can hammered into thin sheet without breaking into pieces. Name this property of metals?
Q. Some metal drawn into thin wire. Name this property of metals?
Q. Name material used to make chalk?
Ans: Calcium carbonate
Q. Why do houses have cement floor?
Ans: Houses have cement floor because it can polished to make attractive.
Q. Define soluble and insoluble substance?
Ans: Material that mixed with water is called soluble e.g. acid, base, milk, lemon juice, sugar and alcohol. Material that do not mixed with water is called insoluble like oil, sand, alum etc
Q. what will happen if you drop piece of chalk and sponge in to glass of water?
Ans: Chalk and sponge absorb water due to gap between their particles.
Q. Which material you prefer to use for furniture?
Ans: Wood and Metal as they can polished and hard to break.
Q. Classify material on the basis of conductivity?
Ans: Materials have property to conduct electricity through them. This property is called conductivity. On the basis of that it can be divided into Good conductor and bad conductor.
A substance which conducts electricity is called good conductor like silver, copper, aluminum.
Q. Name the best conductor metal?
Ans: Silver is best conductor.
Q. Name a non metal that conduct current?
Ans: Graphite is only non metal that conduct electricity.
Q. What is the name of material that can scratch easily?
Q. Name hardest and softest substance
Ans: Diamond and talcum powder
Q. What does cold drink contains.
Ans: carbon dioxide gas, sugar and flavored syrup.
Q.Why axe head is made up of iron?
Ans: Because iron is cheap, hard and malleable.
Q. Defines: Solute, solvent and solution?
Ans: Solution: The mixture of two or more substance is called solution. Solute: A substance that is being dissolved is called Solute. Solvent: The substance in which solute dissolve.
Q. Why ice floats on water?
Ans: The density of ice is lower than water so, Ice floats on water.
Q.What is transparency?
Ans: The property of substance to allow light to pass through is called transparency.
Q. What is Opaque object?
Object that do not allow light to pass is called opaque like wood, metals etc.
Object that allow light to pass partially is called Translucent. Glass, water, Oil paper etc.
Q. Why handle of utensils made up of Plastic or wood?
Ans: because Plastic or wood
Q. What kind of substance do we see around us?
Ans: we have two types of substance like man Plastic or wood made and natural.
Q. Why do some substance sink or others floats to the beaker field with water?
Ans: Some substances do not dissolve in water so they float unless sink.
Q. Why we can smell something e.g. perfume?
Ans: we can smell something e.g. perfume because smell the liquid floats in the air when evaporated.
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