NST1501 Assignment 2 (DETAILED ANSWERS) 2025 - DUE 17 June 2025; 100% correct solutions and explanations.

NST1501
ASSIGNMENT 2 2025

UNIQUE NO.
DUE DATE: 17 JUNE 2025

, NST1501 Assignment 02 2025

QUESTION 1

1.1 Matter is anything that takes up space and has mass.
(Matter is simply the stuff that makes up everything around us.)

1.2 Molecules are groups of atoms bonded together.
(Think of atoms like tiny building blocks that join to form molecules.)

1.3 In a solid, particles are closely packed together.
(They are very close and don’t move around much. That’s why solids keep their shape.)

1.4 Particles of matter move at any temperature above 0 Celsius.
(Even when it’s cold, particles still move a little unless it’s freezing.)

1.5 When temperature changes, the state of matter can change from one form to
another.
(For example, heating can turn ice into water and then steam.)

1.6 When a substance freezes, the particles slow down and stick together.
(They stop moving freely and become solid.)




QUESTION 2 – True or False


2.1 ✅ True – (Temperature changes can make solids melt or liquids freeze.)


2.2 ❌ False – (Water only freezes at 0°C or lower, not just at any cooler temperature.)


2.3 ❌ False – (That’s called sublimation. Vaporization is turning liquid into gas.)