High Order Thinking Skills (HOTS) - Class 6 MCQ

Correct answer is A. Seeds and Germination.

- Thin strands of yarn are made by twisting shorter fibers together.
- Fibers are the basic building blocks of yarn, which can be natural (like cotton or wool) or synthetic (like polyester).
- Yarn is further woven or knitted to create fabrics.
- The correct answer is D: Yarn, fibers, because yarn is composed of multiple fibers twisted together to form a continuous strand.
- This process allows the yarn to be durable and suitable for weaving or knitting into textiles.

1. Weaving:

   • Weaving involves interlacing two sets of yarns at right angles to create a fabric. The two sets of yarns are known as the warp (the set that runs lengthwise) and the weft (the set that runs crosswise). This process is typically carried out on a loom.

2. Knitting:

   • Knitting is a process in which a single thread or yarn is used to create loops, and these loops are interlinked to form a fabric. Knitting can be done by hand or using a knitting machine.

Analyzing the Statements:

1. Swati:

   • Incorrectly defines knitting as making yarn from fibers (which is actually spinning) and incorrectly defines weaving as interlacing yarns (which is correct but does not relate to knitting).

2. Sanchit:

   • Incorrectly defines weaving as making yarn from fibers and incorrectly defines knitting as interlacing yarns at right angles (which is actually weaving).

3. Surbhi:

   • Correctly defines weaving as interlacing two sets of yarns at right angles to make a fabric and correctly states that in knitting, a thread or yarn is used to create a cloth.

4. Sakshi:

   • Incorrectly claims that weaving is done only for silk and knitting only for wool, which is not true.

- Cup B allows her to hold it for a longer time because her hand is in contact with a smaller surface area than with Cup A.
- Less surface area contact means less heat transfer from the cup to her hand, making Cup B feel cooler.
- This results in a more comfortable grip on Cup B, allowing her to hold it longer without discomfort.

- Shyam produces salt from seawater through the process of evaporation. This involves allowing the water to evaporate, leaving salt crystals behind.

- To purify the salt, Shyam uses filteration. This process involves dissolving the impure salt in water, filtering out insoluble impurities, and then allowing the pure salt to crystallize out of the solution as the water evaporates.

- These processes are effective in separating salt from seawater and removing impurities, making the salt suitable for sale.

- Composting vegetable waste involves decomposition, where microorganisms break down organic matter.
- This process is a chemical change because new substances are formed, such as carbon dioxide, water, and humus.
- It is a desirable change as it recycles organic waste into nutrient-rich soil amendment.
- Composting is irreversible because once waste becomes compost, it cannot revert to its original form.
- Thus, the correct statement is iv only: a chemical and desirable change.

- Baking bread is a chemical change due to irreversible reactions.
- Change in Odour: As bread bakes, new aromas form from reactions between ingredients.
- Change in Texture: The dough transforms into a solid, spongy structure due to heat.
- Change in Taste: New flavors develop from Maillard reactions and caramelization.
- Bread Remains Bread: While true, it doesn't indicate a chemical change.
- Thus, the correct answer is C: i, ii, and iii.

- Uses of Micro-organisms:
- Micro-organisms serve multiple purposes beneficial to humans, such as:
- Food Production: Yeasts are used in baking and brewing.
- Medicine: Bacteria and fungi produce antibiotics.
- Environmental: Aid in decomposing organic matter and bioremediation.
Thus, option A is correct as it focuses on their usefulness to humans.

statements ii and iii are true.

- Organism X has a 4-stage life cycle: egg, larva, pupa, and adult. This is known as complete metamorphosis.
- Organism Y has a 3-stage life cycle: egg, nymph, and adult, which is incomplete metamorphosis.
- The young of organism X (larva) does not resemble the adult, while the young of organism Y (nymph) looks similar to its adult form.
- The ability to fly is not confirmed for both adults based on the diagrams alone.

- When light shines on an object, it blocks light, casting a shadow.
- The size of the shadow depends on distances A (object to torch) and B (object to screen).
- Increasing distance A decreases shadow size since light spreads wider.
- Increasing distance B increases shadow size as the shadow spreads over a larger area.
- Option B correctly illustrates these changes, showing how shadow size varies with A and B.

Luminous Bodies emit their own light energy themselves.
Objects that are transparent look clear, like eye glasses or water. Light passes through transparent objects
The objects that allow some light rays but not all to travel through them are translucent objects.
An opaque object is something that allows no light through it. 
The objects, which do not emit their own light, are known as non-luminous objects. 

- In an electric circuit, electricity flows through all components that are part of the circuit and connected in a complete loop.
- The circuit includes a wire, battery, and bulb.
- The wire conducts electricity, the battery provides the electrical energy, and the bulb uses the energy to produce light.
- For electricity to flow, all these components must be connected; thus, electricity passes through the wire, battery, and bulb.
- Therefore, the correct option is C: Wire, battery, and bulb.- In an electric circuit, electricity flows through all components forming a complete loop.
- The circuit includes:
- Wire: Conducts electricity.
- Battery: Supplies electrical energy.
- Bulb: Converts electrical energy into light.
- For a complete circuit, all these components must connect, allowing electricity to flow.
- Thus, electricity passes through the wire, battery, and bulb.
- Therefore, the correct option is C: Wire, battery, and bulb.

The answer is all of the above as if the nail is magnetized, It could move the compass needle, attract the paper clip as it has iron in it , It attracted the magnet  as opposite poles attract each other and It repelled the magnet because the same poles repel each other.

- A compass needle aligns itself with the magnetic field lines.
- A bar magnet has a magnetic field with lines that emerge from the north pole and enter the south pole.
- When a compass is near a bar magnet, its north-seeking pole (usually marked) points towards the south pole of the magnet.

- The experiment demonstrates that air occupies space.
- When Arav pushed the inverted glass into the water, the air trapped inside prevented water from entering, keeping the paper dry.
- This shows that air takes up space inside the glass, creating a barrier against the water.
- If air did not occupy space, water would fill the glass and wet the paper.
- The experiment effectively illustrates this fundamental property of air.

Ans: d

Explanation: The amount of precipitation that soaks into the soil depends on several factors: the amount and intensity of the precipitation, the prior condition of the soil, the slope of the landscape, and the presence of vegetation.