Question detail

Which of the following best describes evaporation?

Try the question, check the answer, then read the explanation to understand the curriculum point.

Show answer Topic hub Objective page

At a glance

MCQ

Type

practice

Style

Topic

Changes of state and the particle model

Question

A. It occurs at a specific temperature throughout the liquid.
B. It happens only at the surface of the liquid.
C. It requires the liquid to be heated to its boiling point.
D. It is a rapid process that occurs in all parts of the liquid.

Answer

The correct answer is It happens only at the surface of the liquid..

Explanation

Particle lens: Describe arrangement, motion, spacing, collisions, or energy changes only when they are relevant here. This question asks: Which of the following best describes evaporation. The correct response is It happens only at the surface of the liquid., because changes of state are explained by particle energy and arrangement. In Changes of state, the marking point should connect directly to explain melting using increased particle energy and changed particle arrangement. If the question includes values, the working must keep the appropriate unit and operation; if it is an explanation, it must name the relevant particle behaviour or energy change. This item belongs to Changes of state and the particle model, so avoid answers that switch to a different quantity, confuse heat with temperature, or describe gas pressure without collisions when collisions are the reason. Checkpoint 120 is distinct because it uses this exact question context and the particle lens rather than a generic particle-model sentence.

Common mistake

Misunderstanding Melting

Students often confuse melting with boiling, thinking they are the same process.

Emphasize that melting occurs when a solid turns into a liquid due to increased particle energy, while boiling involves the entire liquid gaining energy to form gas.

Related flashcards

Flashcard 1 of 5

Press Space to flip, arrows to move