Practicing with SCERT Class 6 Basic Science Notes and Kerala Syllabus 6th Standard Basic Science Model Question Paper Set 1 English Medium will help students prepare effectively for their upcoming exams.
Class 6 Basic Science Model Question Paper Set 1 English Medium
Activity 1
Mayoori observe the cheek cells of two per-sons of different age groups.
a) Is there any difference in the size of cheek cells of the child and adult.
b) The size of organisms are different what is the reason?
c) Is die shape of different cells in our body is same?
d) Write name of any two cells in human body
Answer:
a) No
b) Different cells do different things. they have different shapes and sizes. The size of an animal depends on the size and number of cells it contains.
c) No. different cells have different sizes and shapes.
d) Cheek cells. Red blood cells
Activity 2
a) Complete the below given flow chart
b) Veni and her friends burns a magnesium ribbon. What change takes place there?
c) Find out physical changes from the following.
d) Candle burns. iron rods rust, mangoes ripen. ice melts.
Answer:
b) Burning of magnesium ribbon is chemical change.
C) Candle burns, ice melts
Activity 3
a) Draw any flower and lable its parts.
b) Gopika cuts a mango and a tomato.
i) How many seeds,are present in both?
ii) What is the reason?
c) Vanilla plant is artificially pollinated Why’?
Answer:
a) Labelled diagram of Hibiscus flower
b) (i) Mango have only one seed
Tomato have more than one seed
ii) Number of seeds depends on the number of ovules present in the ovary of a flower before fertilisation. Mango flower has only one ovule init’s ovary. So it contain only one seed. Tomato flower has more ovules in it’s ovary. So it contains more seeds.
c) Vanilla plants that grows in Mexican forests are pollinated by honey bee called melipona. When we Cultivated vanilla in our country as there were no melipona bees we had to adopt artificial pollination.
Activity 4
Observe the following motions.
Swirling a stone A rotating A ripe mango to a rops top falling down
a) Define each type of motion given in the picture
b) What is the use of blow pipes? What are the materials required to make the blow pipe?
c) Write down the uses of gears
Answer:
a) Swirling a stone tied to a rope – Circular motion
- The motion of a body along a circular path is called circular motion.
- A rotating top – Rotation
- The movement of a body about its own axis is rotation.
- A ripe mango falling down-linear motion. The motion of a body along a straight line is linear motion.
b) Blow pipe is used to observe vibrations. The materials required to make blow pipe 10 cm long pipe of one inch diameter, a balloon, the empty case of a pen, rubber band, 2m long thread and cello tape.
c) Gears are used to change speed and direction of motion.
Activity 5
Renuka was observing sky at night. She saw innumerable stars and they appears to twinkle.
a) What is the reason?
b) We can’t see stars at day time why?
c) Which one is big ‘Thiruvathira’ or sun?
Answer:
a) Stars are self luminous celestial bodies. The rays of light from the stars undergo continuous change in its direction while trarisversing through various layers in the atmosphere. That is why stars appear to twinkle.
b) Stars are present in the sky during the day time. but we are not able to see stars because of the Scattering of sunlight.
c) Thiruvathira.
Activity 6
One day saritha visited salt pan along with her friends. There she saw seawater is collected in shallow pits.
a) What is the use of salt pans?
b) Name the method used to separate salt from sea water?
C) Which other mixtures can be separated into constituents through this method?
Answer:
a) Salt pans are used to separate salt from sea water by evaporation.
b) Evaporation.
c) Sugar from sugar solution. Copper sulphate crystals from copper sulphate solution.
Activity 7
Ajith is standing in an unknown place. He can’t see the can’t see the sun due to the rains. He had a bar magnet in his bag
a) How will Ajith find out the direction?
b) Are all the magnets at rest in the same direction? Which is the direction?
c) What are the use of directive property of magnet?
d) What do you mean by poles of a magnet
Answer:
a) Suspend the bar magnet freely in the air it alings in the north-south direction. N marking on the magnet indicates North pole and S marking on the magnet indicates south pole. If your face is towards north then the right side will be towards east.
b) Yes, Freely suspended magnets always comes to rest in the North-South direction.
c) In ships to find the direction, To know the direction inside a forest.
d) The end portions of a magnet where magnetic force is strongly felt are the poles of the magnets.
Activity 8
Look at the picture given below.
a) Find out the biotic and abiotic factors from the picture.
b) If we destroyes this ecosystem what will happen?
e) What are the human activities cause destruction to the ecosystem?
Answer:
a) Biotic factors : – frog, fish, water snake, turtle, Crane, Dragonfly, deer, bird, trees Abiotic factors : -Water, Air, Soil, sunlight
b) Organisms loss their habitats
→ Increased flooding due to erosion of soil and lack of trees.
→ Disruption of an ecosystem affect the a survivl of some species
→ Results in poor air quality and undrink able water
c) Levelling of land, filling of paddy fields, pollution, deforestation, Population growth, Over exploitation.
Activity 9
a) Many of organisms are facing the threat of extinction. Name any two organisms which are facing the threat of extinction
b) Rama saw a turtle is moving. When he touches, it suddenly moves its less and head into the shell
i) What is the use of shell?
ii) The shell is known as?
c) What are the symptoms of bone fracture?
Answer:
a) → Star tortoise, Golden Beetle
b) i) → Shell help to protect the body parts of organisms
ii) Exoskeleton
→ It provides shape
→ It help to escape from enemies
c) → Pain in the injured part
→ Difficulty in moving the injured part
→ Swelling of the affected part
→ A light bending at the sight of injury
→ Structural change with respect to a similar bone
Activity 10
Protein is a major food constituent that helps the development and growth of the body.
a) Name the elements that present in protien?
b) Deficiency of protein leads to retardation of growth. Name that situation?
c) How will you check the presence of protein in egg?
Answer:
a) Hydrogen, Carbon, Oxygen, Nitrogen and sulphur
b) K washiorkar
c) Aim: To determine the presence of protein in egg
Materials required : Copper Sulphate, Water, Sodium Hydroxide, Dropper, beaker, egg white, test tube.
Procedure : Add water to egg white and stir it well. Take it upto a quarter of test tube. Add 9-10 drops of 1% concentrated Sodium hydroxide to it. Stir it and add 2 drops of 1% Concentrated copper sulphate solution to it.
Observation : Appearance of violet colour indicates the presence of protein.