SI units quiz, Physics grades 9-10 (free)

Quick answer: SI units are the internationally agreed units for measurement: metre for length, kilogram for mass, second for time, ampere for current and kelvin for temperature. This Physics 9-10 quiz checks SI units with 10 multiple-choice questions and instant feedback; every answer comes with a short explanation.

SI units quiz for GCSE physics: 10 questions with answers

This SI units quiz for physics grades 9-10 has quick multiple-choice questions with instant feedback. Need a refresher first? Read the lesson or do the worksheet on SI units.

Choose the best answer for each question. Each has one correct option, and the wrong options come from mistakes students often make with prefixes, powers of ten and significant figures.

Level: Physics grades 9-10 (GCSE · IGCSE · O Level · Class 9-10) · Curriculum: GCSE WS, IGCSE 1.1

Contents

SI units quiz: the questions

Which is the SI base unit of mass?

What is 5 mA in amperes?

How many cm² are there in 1 m²?

Which is 0.00045 in standard form?

How many significant figures does 0.0206 have?

How should 12.5 × 3.2 be quoted?

Readings of 9.8, 9.9 and 9.8 against a true value of 12.0 are...

What is the uncertainty in readings 4.2 s, 4.6 s and 4.4 s, using half the range?

What does the resolution of a ruler marked in mm tell you?

Which prefix means 10⁻⁹?

SI base unit of length? — The metre (m).

SI base unit of mass? — The kilogram (kg).

What does kilo mean? — 10³, or 1000.

What does milli mean? — 10⁻³, or one thousandth.

What does micro (µ) mean? — 10⁻⁶, or one millionth.

Standard form pattern? — a × 10ⁿ with a from 1 up to (not including) 10.

Do leading zeros count as significant figures? — No, they never count.

Define accuracy. — How close a result is to the true value.

Define precision. — How close repeated results are to each other.

Uncertainty from repeats? — Half the range: (largest − smallest) ÷ 2.

SI units quiz for GCSE physics: 10 questions with answers

SI units quiz: the questions