These are UNCOUNTABLE NOUNS or MASS NOUNS that represent abstract concepts, fields of study, or mass substances. Even though they end in 's', they are singular because they represent single concepts. Example: 'Mathematics is difficult.' 'The news is good today.' 'Physics requires careful study.' Other examples: economics, politics, measles, mumps. They don't have plural forms.

Break down complex topics into smaller, manageable chunks for easier recall.

Zambia

• Joseph Soko – 101 pts

• Distance of A Straight Line
• Mid-point of A Line
• Equation of a Straight Line
• Parallel and Perpendicular Lines
• COMMUNICATION SYSTEMS