Explanation

Fractional distillation separates the components of petroleum based on their boiling points.

It produces useful products like petrol, diesel, kerosene, and more.

Explanation

Water is actually a polar molecule, not non-polar.

Due to the difference in electronegativity between hydrogen and oxygen.

Its polarity allows it to be a universal solvent, dissolving many substances.

Explanation

Trypsin works best in a basic (alkaline) environment like the small intestine.

The stomach is highly acidic, which inhibits trypsin’s activity.

Explanation

A hypothesis is a testable and specific explanation for a scientific observation or question.

It can be confirmed or rejected through experiments and data collection.

Explanation

Mixing vinegar (acetic acid) with baking soda (sodium bicarbonate) produces carbon dioxide gas, water, and sodium acetate.

This is a chemical reaction with visible fizzing, showing a new substance is formed.

Explanation

A catalyst speeds up a chemical reaction without being consumed in the process.

It lowers the activation energy, allowing the reaction to occur faster.

Explanation

Water is crucial for vital biological processes like digestion, circulation, and temperature regulation.

It also acts as a solvent, transporting nutrients and waste in living organisms.

Explanation

The nucleus is the dense center of an atom, containing protons (positively charged) and neutrons (neutral).

Electrons orbit around the nucleus in electron shells.

Explanation

Filtration is used to separate an insoluble solid (like sand) from a liquid (like water).

The sand stays on the filter paper, while the water passes through.

Explanation

Carbon dioxide (CO₂) is a major greenhouse gas that helps trap heat in the Earth’s atmosphere.

It plays a key role in maintaining Earth’s temperature but excess CO₂ leads to global warming.