Explanation

The bubble in a spirit level is formed by leaving an air gap inside a sealed liquid vial.

This air gap naturally moves to the highest point, helping indicate level alignment.

Explanation

The set of whole numbers includes both odd and even numbers, making it larger and more inclusive.

Therefore, it can act as a universal set containing odd numbers and even numbers as subsets.

Explanation

A learning outcome describes what a learner should be able to do after completing a course or module.

It focuses on observable and measurable skills or knowledge.

Explanation

A test is an instrument with structured items to measure specific learning objectives or skills.

It is widely used in educational assessments to evaluate performance.

Explanation

Psychology is the scientific study of behavior and mental processes (thoughts, emotions, etc.).

It explores how people think, feel, and act in different situations.

Explanation

"Wisdom" is an abstract noun because it refers to a quality or idea that cannot be seen or touched.

It represents a state of mind, not a physical object.

Explanation

This house was built by them in 1990.

The sentence is in past simple tense ("built"), so passive voice becomes "was built."

The object "this house" becomes the subject in passive voice.

Explanation

Ball has a long vowel sound (/ɔː/) as in "ball."

Dog has a short vowel sound (/ɒ/ or /ɔː/ depending on dialect, but generally short).

Hat has a short vowel sound (/æ/).

Big has a short vowel sound (/ɪ/).

Explanation

Plasticine was invented in 1897 by William Harbutt, an English artist and teacher.

It is a soft, oil-based modeling material used widely in art and education.

Explanation

Tar (Tarkol) was used to waterproof the floor and walls of the Great Bath in Mohenjo-Daro.

This shows the advanced engineering skills of the Indus Valley Civilization.