Practicing with SCERT Class 6 Basic Science Notes and Kerala Syllabus 6th Standard Basic Science First Term Question Paper 2022-23 English Medium will help students prepare effectively for their upcoming exams.
Class 6 Basic Science First Term Question Paper 2022-23 English Medium
Activity 1
Observe the cartoon
Ohh ….How big will be his cells!
A. Do you agree with Mosquito’s thought? Give reasons.
B. Different stages of observation of cheek cells is given below. Arrange them in the correct order.
Observer the specimen through the micro scope.
1. Wash the mouth thoroughy with clean water
2. ………………..
3. ……………….
4. ……………….
5. ……………….
6. Observe the specimen through the micro scope.
Answer:
A. No
As the body grows the numbers of cells increases size of cells remains the same. Different cells have different sizes.
The size of an animal depends on size of different cells and number of cells.
B. 1. Wash the mouth thoroughly with clean water.
2. Scrap the internal surface of the cheek cells using a new tooth brush.
3. Place the cheek scrap in a drop of water taken on the slide
4. Add a drop of stain
5. Cover it with the cover glass.
6. Observe the specimen through the microscope.
Activity 2
A. Complete the table related to the various changes taking place in the kitchen.
| (i) ………. | Chemical Changes |
| Ghee Melts | Milk turns to curd |
| (ii) ………. | (iv) ……………. |
| (iii) ………… | (v) ……………. |
B. Both chemical and physical changes are taking place while burning a candle. Do you agree with this statement? Justify your answer.
Answer:
A i) Physical Change
iv) LGP burns (cooking gas)
ii) Candle burns
v) Paper bums/wood bums
iii) Cutting Vegetables
B) Wax undergoes both physical and chemical changes when a candle bums. Melting of candle is a physical change. The wax vapours then bums at the wick to leave behind soal and water vapour, while emitting heat and light. The burning of wax vapours is a chemical change.
Activity 3
Observe the picture given below.
A. Identify and name the organisms?
B. What is the common feature of these organ-isms?
C. Describe the procedure to observe these or-ganisms.
Answer:
A Picture 1-Amoeba
Picture 2- Euglena
B. These organisms are unicellular. They contain only one cell.
C. Aim: To observe microorganisms like amoeba and euglena
Materials required: Microscope, Slide, Cover glass, hay soaked water.
Procedure: Take a drop of hay-soaked water on a slide. Place the cover glass and then observe it through the Microscope.
Observation: We can observe micro organisms like amoeba and euglena.
Activity 4
Observe the following situations.
A. Complete the table.
| Situation | Forms of energy that undergoes change | Forms of energy Produced | Forms of energy we make use of |
| 1 | Chemical Energy | (i) ……………. | Light, sound |
| 2 | (ii) ……………. | Heat, light sound, | (iii)……….. |
| 3 | Chemical Energy | (iv) ………….. | |
| 4 | (v) …………….. |
B. Analyse the table and write any two findings
Answer:
1) i) Light energy, heat energy, sound energy
2) ii) Chemical energy
iii) Heat energy
3)iv) Heat energy, Light energy
v) Light energy
4) vi) Heat energy, Light energy
B) → Energy can neither be created nor destroyed. One form of energy can be converted to another form energy.
→ When forms of energy that undergoes change to produce another forms of energy. We can make use of the desired forms of energy.
Activity 5
Observe the picture
A. Identify the cells and write their names.
B. Write the names of parts marked as 1 and 2 in the picture of muscle cell given below.
C. Parts of the cell and their peculiarities are given in the table below. Match them suit-ably.
| Parts of the cell | Peculiarities |
| Cytoplasm | Centre of the cell |
| Nucleus | Helps in photosyntheis |
| Cell Membrane | Matrix filled inside the cell |
| Chloroplast | Covering of the cell |
Answer:
A. Picture 1 – Check Cells
Picture 2 – Neuron
B. 1. Cell Membrane
2. Cytoplasm
C. Cytoplasm – Matrix filled inside the cell
Nucleus – Centre of teh cell
Cell Membrane – Covering of teh cell
Chloroplast – Helps in photosynthesis.
Activity 6
Observe the picture of a device which can glow an LED bulb using minimotor.
When the shaft of minimotor is rotated fast using a twine, the LED bulb glows.
A. List out the energy changes taking place in this activity.
B. What are the energy changes taking place while a cell is used instead of minimotor?
C. Write any other situation in which energy changes takes place?
Answer:
A. Mechanical energy is used to rotate mini motor.
Minimotor → Electrical energy + Sound energy + Heat energy.
Electrical energy produced by the minimotor is used to light the LED bulb.
B. When a cell is used instead of minimotor Chemical energy of the cell converted to Electrical energy. The Electrical energy lights the LED bulb.
C. In a generator mechanical energy converted to Electrical energy.
Activity 7
Parts of a flower and their functions are given in the flash cards.
A. Complete the flash cards.
Observe the picture of the flower given be-low.
B. Is the flower, unisexual or bisexual ? Why?
Answer:
A. i) Pedicel – Forms a connection between flower and plants
ii) Thalamus
(iii) Corolla – Provides colour, fragrance and attractiveness to the flower.
(iv) Gynoecium
(v) Male reproductive organ.
(vi) Protects the flower when it is a bud.
B. The flower is bisexual flower
Hibiscus flowers having both androecium and gynoecium in the same flower. So it is a bisexual flower.
Activity 8
Examine the table
| Part of the cell | Plant Cell | Animal |
| Cell Wall | Yes | No |
| Nucleus | Yes | Yes |
| Vacuole | Large | Small |
| Cytoplasm | Yes | Yes |
| Chloroplast | Yes | No |
A. Which are the common parts seen in plant cell and animal cell?
B. Analyse the table and write any three findings.
Answer:
A. Nucleus, Vacuole, Cytoplasm
B. i) Plant cell contain cell wall
ii) Both plant and animal cell having Vacuole. Plant cell having large Vacuole while animal cell having small Vacuole.
iii) Both plant and animal cell having nucleus, Cytoplasm and Vacuole.
Activity 9
Different stages of the experiment related to state of change of water are given below.
A. Write any three findings of this experiment.
B. On the basis of this experiment, explain how rains is formed?
Answer:
A i) Ice absorbs heat energy and changed its state. It converted into water.
ii) Water absorbs heat energy and changed its state. It converted to water vapour.
iii) By absorbing heat energy a substance get changed its state to another state.
B. By absorbing heat energy from the sun, the water converted to water vapour and rises up to the atmosphere, where this water vapour loses its heat energy and converted back to water. This water drops down as rain.
Activity 10
Observe the picture given below.
A. Draw the picture and label the parts.
B. Where are the male gametes seen in a flower? Explain.
Answer:
B. male gametes are seen in the pollen grain found in the anther of the androecium.