6th Science Second Mid Term Test 2024 - Official Question Paper with Solutions
6th Science
This post provides the complete solutions for the Class 6 Science Second Mid Term Test 2024. Refer to these answers to check your performance and for exam preparation.
I. Choose the correct answer (5x1=5)
1. When an Object is heated, the Molecules that make up the Object _________
- (a) Begin to move Faster
- (b) Lose Energy
- (c) Become heavier
- (d) Become lighter
2. Drying of wet clothes in air is an example of _________
- (a) Chemical change
- (b) Undesirable change
- (c) Irreversible change
- (d) Physical Change
3. Bursting of fire Crackers is a _________
- (a) Slow change
- (b) Fast Change
- (c) Irreversible Change
- (d) Reversible Change
4. Which one of the following is not an Unicellular organism?
- (a) Yeast
- (b) Amoeba
- (c) Spirogyra
- (d) Bacteria
5. Most organelles in a eukaryotic cell are found in the _________
- a) Cell Wall
- b) Cytoplasm
- c) Nucleus
- d) Vacuole
II. Fill in the blanks (3x1=3)
6. The SI unit of temperature is _________
7. I am Like a policeman Who am I _________
8. The Instrument used to observe the cell is _________
III. Answer any 6 of the following (6x2=12)
9. What is Temperature.
10. Make a list of electrical equipment at home which we get Heat From.
- 1. Electric Iron / Iron Box
- 2. Water Heater / Geyser
- 3. Electric Stove / Induction Stove
- 4. Toaster
- 5. Hair Dryer
11. What is a Solution?
12. What happens when Canesugar is strongly heated? Mention any Two changes in it?
- It melts and turns brown, a process called caramelization.
- Upon further heating, it turns into a black, solid substance, which is carbon. This is called charring or carbonization.
13. Circle the odd one out. Give Reason for your Choice.
i) Rotting of an Egg, condensation of Water Vapour, Trimming of Hair, Ripening of Fruit.
Odd one out: Condensation of Water Vapour.
Reason: Condensation of water vapour is a reversible physical change, where water changes from a gaseous state to a liquid state. The other options (Rotting of an Egg, Trimming of Hair, Ripening of Fruit) are all irreversible changes.
14. Draw a neat labelled diagram of a Prokaryotic Cell.
Key labels:
- Capsule (outermost layer)
- Cell Wall
- Plasma Membrane
- Cytoplasm
- Ribosomes
- Nucleoid (contains genetic material)
- Flagellum (for movement)
15. Analogy:
i) Prokaryote : Bacteria :: Eukaryote : Amoeba / Plant Cell / Animal
ii) Spirogyra : Plant Cell :: Amoeba : Animal Cell
16. Match the following.
- i) Heat - Joule
- ii) Thermal Equilibrium - No heat flow
- iii) Ice Cube - 0°C
- iv) Boiling Water - 100°C
IV. Answer briefly. (any Two) (2x5=10)
17. Distinguish between Heat and Temperature.
| Heat | Temperature |
|---|---|
| Heat is the total kinetic energy of the molecules in a substance. | Temperature is the measure of the average kinetic energy of the molecules. |
| It is a form of energy that flows from a hotter body to a colder body. | It is the degree of hotness or coldness of a body. |
| The SI unit of heat is Joule (J). | The SI unit of temperature is Kelvin (K). |
| It is measured using a calorimeter. | It is measured using a thermometer. |
18. Give one example for each case that Happens around you.
- a) Slow and Fast Change
Slow Change: Rusting of iron.
Fast Change: Burning of paper. - b) Reversible and Irreversible change
Reversible Change: Melting of ice.
Irreversible Change: Cooking rice. - c) Physical and Chemical Change
Physical Change: Tearing a paper.
Chemical Change: Burning of wood. - d) natural and Man - Made change
Natural Change: Ripening of a fruit.
Man-Made Change: Constructing a building. - e) Desirable and Undesirable change
Desirable Change: Ripening of fruits.
Undesirable Change: Rotting of fruits.
19. Tabulate any five Cell organelles and their Functions.
| Cell Organelle | Function |
|---|---|
| Nucleus | Controls all the activities of the cell ("Brain" of the cell). |
| Mitochondria | Produces energy for the cell ("Powerhouse" of the cell). |
| Ribosomes | Responsible for protein synthesis. |
| Cell Membrane | Controls the movement of substances in and out of the cell. |
| Vacuole | Stores water, food, and waste products. |