Explanation

• Paper Chromatography is a method used to separate and identify colored substances, especially dyes in a mixture.
• It works based on different rates of movement of substances through absorbent paper with a solvent.

Additional information:

• Filtration – separates solids from liquids.
• Sublimation – separates a solid that sublimes from a mixture.
• Distillation – separates liquids based on boiling points.

Last verified on 08-03-2026

Explanation

The correct answer is: Molecules do not collide with one another

Gas molecules:

• Are widely separated
• Have low attractive forces
• Are free to move in any direction
• Collide with one another

Last verified on 08-03-2026

Explanation

Explanation

• Decomposers are organisms that break down dead and waste products, releasing useful elements such as carbon, nitrogen, and phosphorus back into the soil and environment.
• This process is called decomposition, and it's an essential step in the nutrient cycle.

Decomposers include organisms like:

• Bacteria
• Fungi (such as mushrooms)
• Detritivores (such as earthworms and insects)

By breaking down organic matter, decomposers help to:

• Recycle nutrients
• Improve soil structure and fertility
• Support plant growth and development

Last verified on 07-03-2026

Explanation

• A parachute increases air resistance (drag) when it opens in the air.
• This slows down the falling speed of a skydiver, allowing a safe landing.

Forces acting on a skydiver:

• Gravity (pulls downward)
• Air resistance (pushes upward)

Last verified on 07-03-2026

Explanation

• An iron nail/steel rod can be magnetized by passing an electric current around it, a process known as electromagnetic induction.
• This is the principle behind electromagnets.

Last verified on 07-03-2026

Explanation

• Friction is a force that opposes motion between two surfaces in contact.
• It slows down or stops objects when they move against each other.
• Friction helps us walk, write, and hold objects without slipping.
• Too much friction can cause heat and wear in machines.

Last verified on 07-03-2026

Explanation

• Apples contain about 0.3 grams of protein medium-sized fruit.
• Watermelon: 0.6 grams of protein per cup.
• Mango: 1.4 grams of protein per cup.
• Peanuts: 20.5 grams of protein per 100 grams.

Last verified on 06-03-2026

Explanation

• An aqueous solution is one where water acts as the solvent, dissolving the solute.
• This type of solution is common in many chemical reactions and biological processes.

Last verified on 06-03-2026

Explanation

• Sublimation is the process by which a solid substance transitions directly into a gas or vapour, without going through the liquid phase, and then condenses back into a solid.
• Examples include iodine, dry ice, and naphthalene.

Last verified on 06-03-2026