Science Std IV Chapter 8

8. Keeping Safe

A. State whether true or false.
1. It is safe to run down the stairs.
2. We should not take medicines without consulting elders.
3. We should use zebra crossing to cross the road.
4. It is safe to talk on phone while driving.
5. We should use life jacket during swimming.

B. Answer the following questions.
1. How can we avoid accidents?
2. Mention three things we should be careful about when we are in the kitchen.
3. What are the safety measures we should adopt when we are in the bathroom?
4. How can we assure our safety outside the home?
5. What first aid will you give to the following people?
    (a) A person with a minor cut     (b) A person with a burnt finger
    (c) A person bitten by a bee      (d) A person who has fainted
6. What first aid should be given to a person who is bitten by an insect?
7. How can we assure safety outside home?
8. What can happen if a staircase doesn't have a hand railing?
9. What will happen if a person who doesn't know how to swim goes to
    swimming without wearing a life jacket?

C. Fill in the blanks.
1. We should handle sharp objects like ___________________ very carefully.
2. We should not leave soap bar on the ___________________ of the bathroom.
3. Use a life jacket when ___________________ in a ___________________.
4. We should not apply ___________________ or ___________________ on the
    burnt area.
5. If a ___________________ or ___________________ stings, we should apply
    a paste of baking soda and an antiseptic cream on the affected area.
6. To avoid ___________________, we should be careful and alert.

D. Tick the correct answer.
1. We should follow safety rules
   (a) only in the kitchen   (b) only in bathroom   (c) everywhere
2. We should walk
    (a) on the road.    (b) on the pavement    (c) anywhere
3. In case of a minor burn, wash the burnt area with
    (a) hot running water   (b) cold running water   (c) warm running water.
4. Which of these can be applied in case of a cut?
    (a) calamine lotion   (b) antiseptic cream   (c) butter
5. Which cloth material should we avoid wearing while helping our mother
    to cook?
    (a) Cotton   (b) Synthetic   (c) Wool
6. Which of these can be used in case of a burn?
    (a) Antiseptic cream   (b) Baking Soda   (c) Oil   (d) Antiseptic solution
7. Calamine or antiseptic lotion should be used in case of
    (a) insect bites  (b) minor burns  (c) cuts and wounds  (d) both (b) and (c)

E. Unscramble the following words.
(a) MACALINE   (b) NADABEG   (c) NOWUD   (d) TONCOT

Science Std IV Chapter 4

4. Adaptations for Survival in Animals

A. Fill in the blanks.

1. Terrestrial animals have well-developed _____________________ system
    and sense organs which enable them to sense the changes in their
    surroundings.
2. _____________________ have sharp cutting teeth called incisors.
3. Some animals imitate or mimic other animals for _____________________.
4. _____________________ is a process by which animals confuse their
    predators.

B. Answer the following questions.
1. What is an adaptation?
2. How is a camel adapted to live in hot deserts?
3. Give three adaptations of aquatic animals.
4. How are arboreal animals adapted to their habitat?
5. Mention the characteristic features of:
    (a) Parasites     (b) Carnivores       (c) Herbivores
6. What is camouflaging? Give examples of some animals that camouflage.
7. Why do some animals mimic other animals.
8. Who do we call the carnivores which eat the flesh of dead animals only?
9. Name a disease caused by parasites.
10. What do ducks and geese swim with the help of?
11. How do aquatic animals swim?

C. Match the following.
     Column A                               Column B
1. Birds                                    (a) Sucking tubes
2. Habitat                                 (b) Zebra
3. Blubber                                (c) Moth caterpillar
4. Camouflaging animal          (d) Hollow bones
5. Parasites                              (e) A thick layer of fat under the skin
6. Mimicry                                 (f) The natural home of an animal

D. Tick the correct answer
1. Which of these is an arboreal animal?
    (a) Peacock            (b) Monkey          (c) Bear
2. Which of these animals can blend with its surroundings and confuse its
    enemies?
    (a) Polar bear         (b) Giraffe        (c) Duck
3. Carnivores have sharp, pointed and curved front teeth called
    (a) molars            (b) incisors       (c) canines
4. The long sleep of animals during the cold season is called
    (a) adaptation      (b) hibernation      (c) migration
5. Aquatic animals breathe through their
    (a) lungs       (b) moist skin      (c) gills
6. Which of these have long and strong legs to travel long distances in 
    search of food?
    (a) Deer       (b) Lion      (c) Bear
7. Which of these is not an amphibian?
    (a) Lemur    (b) Frog     (c) Toad
8. Animals that can fly are called
    (a) amphibians    (b) aerial animals    (c) arboreal animals   (d) parasites

E. Name the categories to which these animals belong.
1. frogs, toads, salamanders, newts
2. mosquitoes, fleas, lice, leeches
3. monkeys, chimpanzees, flying squirrels, lemurs

F. Define
1. Habitat  2. Extinct Animals   3. Migration and migratory birds
4. Arboreal animals

G. State whether true or false.
1. Amphibians are animals that cannot live both on land and water.

H. Complete the following web charts.
1. 

2. 

I. Complete the given crossword puzzle with the help of the clues.
     Across
2. The natural home of an animal (7)
3. Changing body colour to blend with the surroundings (10)
6. Cows belong to this category (9)
    Down
1. An animal that survives on other living organisms (8)
4. Animals whose feet and hands are adapted for seizing, grasping and holding
    objects (8)
5. The act of imitating another organism (7)

Science Std IV Chapter 15

15. Measuring things

1. Give the name of the standard unit for measuring:
1) length    2) mass    3) capacity   4) temperature

2. Answer the following questions.
1) Define:   (a) Mass   (b) Temperature   (c) Capacity   (d) Length
2) How will you measure the length of a line using a ruler?
3) Write a note on temperature.
4) Mention the devices and standard units which are used to measure the following:
    (a) length    (b) capacity   (c) mass   (d) temperature
5) Which of these units will you use to measure the length of your pencil box?
    (a) metres   (b) centimetres
6) Which of these will you use to weigh yourself?
    (a) Beam balance     (b) Weighing scale
7) How is an electronic balance better than a beam balance to measure mass of
     an object?

3. Match the following
        Column A                       Column B
(1) Mass                          (a) Temperature
(2) Degree Celsius          (b) Metres
(3) Length                        (c) Beam balance
(4) Capacity                     (d) Weighing scale
(5) Body weight                (e) Measuring cylinder

4. State whether the following statements are true or false.
1) A measuring tape is most commonly used by a cloth dealer.
2) Utensils like spoons, glasses and cups are used to measure capacity in 
    non-standard units.
3) The normal temperature of human body is 37°F
4) Mass of an object tells us how heavy or light that object is.
5) A ruler has markings in centimetres and inches.
6) We use any thermometer to measure the temperature of our body.

5. Unscramble the given words.
1) APCITYAC     2) URERL    3) PERATMETURE     4) MAGRS

6. Tick the correct answer
1) The normal body temperature of a human being is
    (a) 37°C       (b) 45°C      (c) 28°C     (d) 52°C
2) Which of these is used by a cloth dealer to measure the length of the cloth?
    (a) Ruler    (b) Electronic scale      (c) Meter rod    (d) Beam balance

7. Answer in one or few word/s
1) An instrument which is used to measure the weight of a human being.
2) The measure of amount of liquid that a container can hold

Science Std IV Chapter 11

11. Matter and Water

1. Fill in the blanks.
1) The change of state of matter occurs because of ___________________
     changes.
2) ___________________ are the smallest particles of which matter is made of.
3) The fast conversion of a liquid to a gas is known as ___________________.
4) The molecules in ___________________ are not so closely packed as in solids
     and are ___________________ to move about.

2. Name four solids that are (1)hard and (2)soft.

3. Define the following.
1) Fog   2) Snow   3) Solute    4) Frost    5) Dew   6) Hail   7) Solution  8) Insoluble
       substance.

4. State whether the following statements are true or false.
1) The best and safest method of water purification is boiling.
2) Water should not be purified before we use it for drinking and cooking.
3) Insoluble impurities like sand settle at the bottom of the container.
4) Germs present in water cannot be killed by using chemicals like chlorine.
5) A solute dissolves faster in cold water.
6) The molecules are packed very close to each other in solids.
7) The process of cooling down a gas so that it becomes liquid is known as freezing.
8) Filtration is the safest method of water purification.
9) Sand is insoluble in water.
10) Germs present in water can be killed by using chlorine.

5. Answer the following questions.
1) On what factor do the properties of a substance depend?
2) What is the arrangement of molecules in solids and gases?
3) Liquids do not have a fixed shape and can flow easily. Why?
4) What happens during evaporation and condensation of water in nature ? Explain.
5) Define the terms (a) solute (b) solvent   (c) solution.
6) Under which conditions does a solute dissolve faster in water?
7) Differentiate between soluble and insoluble substances.
8) What are the different methods of purification of water?
9) What is a solution?
10) What is meant by sedimentation?
11) Name two qualities of solid.
12) How is liquid different from solid?
13) Mention the qualities of gas. Give examples of gases.
14) What are the qualities of powders?

6. Tick the correct answer.
1) Which of these is a soft solid?
    (a) Cloth    (b) Diamond    (c) Gold
2) When a thick cloud of water drops is formed just above land or water, it is called
    (a) hail   (b) dew    (c) fog
3) The liquid in which a solid dissolves completely is called
     (a) solute    (b) solvent   (c) solution
4) Which of these is a process of purification of water which kills germs?
     (a) Decantation     (b) Filtration    (c) Boiling   (d) Evaporation
5) When raindrops freeze and fall on the earth as small pellets of ice, they are called
    (a) fog   (b) hail   (c) frost
6) Which of these is a soluble substance?
    (a) Sand    (b) Stone   (c) Sugar

7. Complete the web chart.

1)

2)

8. Each of the following clues describe processes which end with 'on'. Name them.
1) The slow conversion of a liquid into a gas
2) The process of settling down of insoluble substances in water
3) The process in which insoluble substances remain in a filter paper and clear
    water is obtained

9. Answer in one or few words.
1) Molecules are composesd of small particles called ___________________.

Science Std IV Chapter 6

6. Food and Nutrition

A. State whether the following statements are true or false.
1. The process by which living beings obtain and utilize food for their growth and development is
     called nutrition.
2. Proteins are also called protective food.
3. The fibre present in our food is known as roughage because it has got food value and can be
     digested easily.
4. The food that we eat on a regular basis forms our diet.
5. We should drink one to two litres of water everyday.
6. Eating too much or too little of any nutrient can cause diseases.

C. Answer the following questions.
1. Why do we need food?
2. What are nutrients?
3. What are carbohydrates? Name some sources of fat.
4. Why do growing children require more proteins? Name some protein-rich food.
5. Why do we need fats? Name some sourcesof fats.
6. What are vitamins and minerals?
7. Why do we need roughage? Name some food rich in roughage.
8. What is a balanced diet?
9. What are bodybuilding foods?
10. Why should we eat required amount of carbohydrates?
11. Why should growing children have milk?
12. How much water does make up for our body weight?
13. Name some food items that contain water.
14. Write the methods of preserving food so that it does not get spoilt easily and can be consumed later.
      Give examples

D. Fill in the blanks.
1. The process by which living beings obtain and utilize food for their growth and development
    is called ______________________.
2. People like ______________________ and  ______________________ do a lot of physical
   work and therefore, require more carbohydrates.
3.  ______________________ are also called bodybuilding foods.
4. Our body stores extra  ______________________ for future use.
5. Green leafy vegetables are a rich source of  ______________________.

E. Tick the correct answer.
1. Food items rich in vitamins and minerals are
    (a) fresh fruit    (b) dry fruit     (c) butter and oil.
2. The nutrients which keep our body warm are
    (a) carbohydrates    (b) proteins    (c) fats.
3. Bread, wheat and potato are rich in
    (a) fats   (b) carbohydrates    (c) roughage
4. Calcium, iron, potassium and iodine are some of the
    (a) minerals    (b) vitamins    (c) proteins
5. The other name for bodybuilding food is
    (a) roughage    (b) mineral    (c) protein
6. The food that we eat on a regular basis forms our 
    (a) balanced diet   (b) diet    (c) nutrition
7. We get energy to work from
    (a) fats   (b) proteins    (c) minerals    (d) carbohydrates
8. Brown rice, oatmeal and fruit are rich in
    (a) fats   (b) roughage    (c) minerals    (d) protein

F. Complete the web chart

G. Find seven words related to this chapter in the given grid. The words may read forward,
    backward and across.

H. Answer in one word or few words.
1. The common term for vitamins and minerals.
2. Found in spinach, meat and milk
3. Energy giving foods.
4. Thick layer of fat under the skin of some animals.
5. Minerals required by our body in small amounts.
6. Mineral that helps in the formation of our bones and teeth

I. Define
1. Nutrients

J. Write the sources of the vitamins given below.
1. Vitamin A
2. Vitamin B
3. Vitamin C
4. Vitamin D
5. Vitamin E
6. Vitamin K

Science Std IV Chapter 14

14. Our Neighbours in Space

A. Choose the correct answer to complete the statement.
1. _______________ is the seventh planet from the sun. (Uranus/Mars)
2. Mars is also known as the ________________ planet. (yellow/red)
3. Pluto is one of the ________________ planets which was earlier considered
    as a planet. (giant/dwarf)
4. The earth is the only planet on which water exists in ________________ form.
    (liquid/gaseous)

B. State whether the following statements are true or false.
1. The earth has mountains, valleys, old volcano sites and many bowl-like holes
    called craters on its surface.
2. The earth's axis runs from the north pole to the south pole.
3. The region of the earth near the equator receives almost the same amount of
    sunlight throughout the year.
4. Ursa Major, Ursa Minor and Orion are some of the galaxies.
5. The hemisphere near the sun has shorter and warmer days because the sunrays
    fall directly on it.

C. Answer the following questions.
1. Name all the planets of the solar system in the right order.
2. Give information about the following:
    (a) Jupiter  (b) The sun   (c) Pluto   (d) The moon   (e) Mercury
3. How is the earth different from the other planets?
4. Explain the following terms:
    (a) Equator    (b) Axis   (c) Orbit   (d) Poles
5. How does rotation of the earth cause day and night?
6. How is revolution of the earth responsible for change in seasons? Explain with a
    diagram.
7. What is a star?
8. What is an equator?
9. Why is the earth known as the blue planet?

D. Match the following.

             Column A                 Column B

     1. Venus                        (a) Eighth planet

     2. Saturn                       (b) Dwarf planet

     3. Mars                          (c) Evening star

     4. Neptune                     (d) Planet with a system of rings

     5. Pluto                           (e) Red planet

E. Tick the correct answer.

1. Which of these is the largest planet in the solar system?

     (a) Jupiter     (b) Saturn    (c) Uranus

2. The imaginary line around the earth which is at equal distance from both the

    poles is

     (a) axis      (b) orbit     (c) equator

3. Which of these is the smallest planet in the solar system?

     (a) Neptune    (b) Mercury    (c) Venus

4. Which of these is the brightest planet in the solar system?

     (a) Earth     (b) Mercury    (c) Venus

5. Which of these planets is known as evening star?

    (a) Mercury   (b) Earth      (c) Venus    (d) Jupiter

6. Which of these is a dwarf planet?

    (a) Saturn    (b) Uranus    (c) Pluto    (d) Jupiter

F. Give one word for the following.

1. Number of days to complete one revolution

2. Smallest planet of the solar system

3. Planet with a system of rings

4. Groups of stars in the sky

5. Natural satellite of the earth

6. The largest planet in the solar system

7. Imaginary line which divides the earth into two equal parts

G. Complete the following series in which planets are arranged in increasing order

     of their distance from the sun.

H. Find out eight words related to planets in the given grid. The words may read

     forward, backward and across.

     















I. Define rotation.

J. Write an experiment to prove that rotation of the earth causes day
    and night with a neat labelled diagram.

Science Std IV Chapter 12

12. Force, Work and Energy

A. Fill in the blanks.
1. A pulley is used to ________________, lower or ________________ a load.
2. ________________ is done when force applied on an object moves it.
3. ________________ is the force with which the earth pulls objects towards itself.
4. Muscular force is the force exerted by our ________________.
5. ________________ is a grooved wheel with a rope or a cable around it.

B.Answer the following questions.
1. What is force? What changes can force bring in an object?
2. What are the different types of forces?
3. Define work.
4. How does machine help us?
5. What are the different kinds of simple machines?
6. What is energy? Name the various forms of energy.
7. What is solar energy? How is it useful to us?
8. Define atomic energy.
9. What is a wedge?
10. How can we generate electricity?
11. What is muscular force?
12. Name a part of the human body which is an example of lever.
13. Name two devices in which electricity from solar energy is used.

C. Match the following.
         Column A                              Column B
1. Screwdriver                          (a) Pulley
2. Can opener                          (b) Wedge
3. Lift                                        (c) Wheel and axle
4. Axe                                       (d) Lever

D. Tick the correct answer.
1. The energy released on joining or breaking of atoms is known as
    (a) atomic energy   (b) solar energy   (c) magnetic energy
2. See-saw is an example of
    (a) pulley    (b) screw    (c) lever
3. Which of these is not an effect of force?
    (a) Change in colour    (b) Change in size   (c) Change in direction
4. The energy possessed by which of these is not used to turn turbines?
    (a) Wind    (b) The sun    (c) Water
5. Which of these is used by plants to prepare their own food?
    (a) Wind energy    (b) Solar energy    (c) Water energy
6. Falling of an apple from a tree is an example of
    (a) gravity    (b) work    (c) friction
7. Knife is an example of
    (a) screw     (b) wedge    (c) pulley     (d) lever
8. The ability to do work is called
    (a) energy    (b) force    (c) friction    (d) gravity
9. Escalator is an example of
    (a) inclined plane   (b) lever    (c) wedge    (d) screw
10. Windmill works due to the energy generated from
      (a) water   (b) wind     (c) sun    (d) both (a) and (b)

E. Complete the following web charts.

F. Complete the crossword using the given clues.
Down:    1. The ability to do work (6)
              2. The smallest particle of matter (4)
              5. The main source of energy on earth (3)
Across:  3. The force by which the earth pulls everything towards itself (7)
              4. Muscular force is the force exerted by our ___________. (7)
              6. Its energy is used to turn windmills (4) 

G. Answer in one word or few words.
1. Energy obtained from the sun.

H. Name the type of force responsible for the following.
1. A stone falling from a height
2. A man pushing a car
3. A ball thrown up in the air comes down
4. A girl slowing down her bicycle
5. A ball rolling on the ground comes to rest

I. Identify whether work is done or not in the following cases.

1. Rohan is pedaling his bicycle.
2. Aarushi is trying to push a tree.
3. Vishal has thrown a ball.
4. Sukriti is holding a flower vase.