Term 2G2 / G3

Sec 1 Science WA2 practice paper

WA2 is usually the Term 2 Science assessment. In the common G2/G3 scheme it checks elements, compounds and mixtures, separation techniques, and the start of the ray model of light. Yishun Secondary’s Sec 1 outlines list Chapters 3, 4 and 5 for WA2.

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Total marks: 30
Time: 40 min
Covers: Chapters 3–5
Format: 10 MCQ + 4 structured

The paper and mark scheme

Set out like a school paper, with a separate mark scheme for checking.

Question paper

WA2 Practice Paper

30 marks · 40 min · 5 pages

10 multiple-choice questions and structured questions with answer lines. Chapters 3–5.

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Mark scheme

PRO

WA2 Practice Paper — mark scheme

Answers · Marking points · 3 pages

Model answers with a mark for each creditworthy point — for marking at home or in class.

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What’s tested

Commonly Chapter 3 (chemical composition), Chapter 4 (separation techniques) and Chapter 5 (ray model of light). Some schools stop before light, so check your school’s assessment outline.

How to use this paper

1Print the paper, or open the PDF and write on paper.
2Set a timer for 40 min and work without notes.
3Mark your answers with the mark scheme, one point at a time.
4Redo every question you lost marks on, then revise that topic.

Preview

The first questions of Section A, as they appear on the paper.

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Section A: Multiple choice[10 marks]

Answer all questions. For each question, write the letter (A, B, C or D) of the correct answer in the brackets provided.

1
Which substance is a compound?
1. Apure water
2. Bair
3. Ciron filings
4. Dsea water
( )
2
A student wants to compare the dyes in three black marker pens. Which technique should she use?
1. Afiltration
2. Busing a magnet
3. Cpaper chromatography
4. Devaporation to dryness
( )
3
A ray of light passes from air into a glass block and bends towards the normal. What is this called?
1. Areflection
2. Brefraction
3. Cdiffusion
4. Dconduction
( )
4
Which list contains only elements?
1. Awater, salt and sugar
2. Bair, brass and sea water
3. Ccarbon dioxide, rust and glass
4. Dcopper, oxygen and iron
( )

Revision checklist

Sort substances into elements, compounds and mixtures, and say why.
Choose a separation method and give the steps in order: filtration, evaporation, distillation, chromatography or a magnet.
Name the solute, solvent, residue, filtrate and distillate in an unfamiliar mixture.
Measure angles of incidence and reflection from the normal, and describe how a ray bends when it enters glass.
Sit this paper in 40 minutes and mark it with the mark scheme.

Exam tips

A compound has a fixed composition. A mixture can be separated by physical methods.
For “describe how to separate”, name each step and what is collected.
Angles at a mirror are measured from the normal, not from the mirror.
A 2-mark explanation needs two separate points.

Questions about the WA2

What is tested in Sec 1 Science WA2?

Many schools test Chapter 3 (elements, compounds and mixtures), Chapter 4 (separation techniques) and some or all of Chapter 5 (the ray model of light). Yishun Secondary’s G2/G3 content outlines use that scope. Your school’s Term 2 outline is the one that counts.

How long is the WA2 paper?

Formats vary by school. This practice paper has 30 marks and takes 40 minutes, with multiple-choice and structured questions.

Is light always in WA2?

Not in every school. Some classes finish separation in Term 2 and start light in Term 3, when it can also appear in WA3. This paper includes a short ray-model section because that is a common WA2 scope.