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Primary 4 Science Materials Quiz
Free P4 Science Materials quiz, Ox Exam version, with questions, answers, and syllabus-aligned practice for Singapore students.
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Answers
Primary 4 Science Quiz - Materials — Answer Key (Version 1)
Teaching notes are written for students new to the topic. Matter means anything that has mass and occupies space.
Answer 1.
C) Air (1 mark)
Teaching note: Matter must have mass and occupy space. Air does both, even though it is invisible. A shadow, sunlight and heat are forms of energy, not matter — they have no mass and do not take up space.
Common mistake: Choosing sunlight or heat because they are "real things". Energy is real, but it is not matter.
Answer 2.
B) Its volume (1 mark)
Teaching note: A liquid has no definite shape, so it takes the shape of whatever container holds it. However, a liquid has a definite volume — 100 cm³ stays 100 cm³ in any container. Only the shape changes.
Answer 3.
B) A measuring cylinder (1 mark)
Teaching note: Volume of a liquid is measured with a measuring cylinder. A ruler measures length, a thermometer measures temperature, and a balance measures mass.
Answer 4.
B) It occupies space (1 mark)
Teaching note: The pebble pushed water out of the way because the pebble takes up room (space). Anything that takes up space and has mass is matter. The overflowing water is the evidence that the pebble occupies space.
Answer 5.
C) Gases take the shape of their container (1 mark)
Why the others are wrong: Solids DO have a definite volume (so A is wrong); liquids do NOT have a definite shape (so B is wrong); solids and liquids have definite volumes, so not all three states have definite shapes (so D is wrong).
Answer 6.
Completed table (2 marks):
| State of matter | Definite shape? | Definite volume? |
|---|---|---|
| Solid | Yes | Yes |
| Liquid | No | Yes |
| Gas | No | No |
Marking: Award 1 mark for any two fully correct rows; 2 marks for all three rows correct.
Teaching note: A solid keeps both its own shape and its volume. A liquid keeps its volume but takes the container's shape. A gas spreads out to fill the whole container, so it has neither a definite shape nor a definite volume.
Answer 7.
(a) Beam balance (or electronic/digital balance) (1 mark) (b) Measuring cylinder (1 mark)
Teaching note: Mass is measured with a balance; volume of a liquid is measured with a measuring cylinder. Always match the apparatus to what is being measured.
Answer 8.
Any TWO of the following, each correctly linked to mass or space (1 mark each):
- An inflated balloon is firm and pushes outward — shows air occupies space.
- Pumping air into a flat bicycle tyre makes it firm — shows air occupies space.
- An inflated balloon tips down on a balance compared with a flat one — shows air has mass.
- Pushing an upside-down cup into water keeps most water out — shows air occupies space.
Marking note: The observation alone earns no mark; the student must link it to "has mass" OR "occupies space".
Answer 9.
(a) mass; space (1 mark) (b) solid, liquid, gas (1 mark)
Teaching note: This is the definition of matter: anything that has mass and occupies space. Every object around us is one of the three states.
Answer 10.
(a) 55 cm³
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Primary 4 Science Quiz - Materials — Answer Key (Version 1)
Teaching notes are written for students new to the topic. Matter means anything that has mass and occupies space.
Answer 1.
C) Air (1 mark)
Teaching note: Matter must have mass and occupy space. Air does both, even though it is invisible. A shadow, sunlight and heat are forms of energy, not matter.
Common mistake: Choosing sunlight or heat because they are "real things". Energy is real, but it is not matter.
Answer 2.
B) Its volume (1 mark)
Teaching note: A liquid has no definite shape, so it takes the shape of its container. However, a liquid has a definite volume — 100 cm³ stays 100 cm³ in any container. Only the shape changes.
Answer 3.
B) A measuring cylinder (1 mark)
Teaching note: Volume of a liquid is measured with a measuring cylinder. A ruler measures length, a thermometer measures temperature, and a balance measures mass.
Answer 4.
B) It occupies space (1 mark)
Teaching note: The pebble pushed water out of the way because the pebble takes up room (space). The overflowing water is the evidence that the pebble occupies space.
Answer 5.
C) Gases take the shape of their container (1 mark)
Why the others are wrong: Solids DO have a definite volume (A wrong); liquids do NOT have a definite shape (B wrong); solids and liquids have definite volumes, so D is wrong.
Answer 6.
Completed table (2 marks):
| State of matter | Definite shape? | Definite volume? |
|---|---|---|
| Solid | Yes | Yes |
| Liquid | No | Yes |
| Gas | No | No |
Marking: 1 mark for any two fully correct rows; 2 marks for all three rows correct.
Teaching note: A solid keeps its own shape and volume. A liquid keeps its volume but takes the container's shape. A gas fills the whole container, so it has neither.
Answer 7.
(a) Beam balance (or electronic/digital balance) (1 mark) (b) Measuring cylinder (1 mark)
Teaching note: Mass is measured with a balance; volume of a liquid is measured with a measuring cylinder. Always match the apparatus to what is being measured.
Answer 8.
Any TWO of the following, each correctly linked to mass or space (1 mark each):
- An inflated balloon is firm and pushes outward — shows air occupies space.
- Pumping air into a flat bicycle tyre makes it firm — shows air occupies space.
- An inflated balloon tips down on a balance compared with a flat one — shows air has mass.
- Pushing an upside-down cup into water keeps most water out — shows air occupies space.
Marking note: The observation alone earns no mark; the student must link it to "has mass" OR "occupies space".
Answer 9.
(a) mass; space (1 mark) (b) solid, liquid, gas (1 mark)
Teaching note: This is the definition of matter: anything that has mass and occupies space. Every object around us is one of the three states.
Answer 10.
(a) 55 cm³ (1 mark)
Teaching note: Read the scale marking at the bottom of the curved surface (meniscus) of the liquid. Here it lines up exactly with 55 cm³.
(b) Place the eyes level with the bottom of the meniscus when reading (or: read the scale at the bottom of the liquid's curved surface). (1 mark)
Teaching note: Reading from above or below gives a wrong value because of the viewing angle.
Answer 11.
(a) Yes. Both containers hold exactly 250 cm³ of water. A liquid has a definite volume, so its volume does not change when the shape of the container changes. (1 mark)
(b) Yes. Water is a liquid and liquids have no definite shape, so the water takes the shape of whichever container holds it — tall and thin in Container A, short and wide in Container B. (2 marks)
Teaching note: Shape depends on the container; volume stays the same for a given amount of liquid.
Answer 12.
The ice cube melted because it gained heat. The heat came from the warmer surroundings — the air in the room (and the plate) around the ice cube. (2 marks)
Teaching note: Heat always flows from a warmer place to a cooler place. Room temperature is higher than freezer temperature, so heat flows into the ice and melts it.
Answer 13.
It shows that air has mass. The inflated balloon is heavier than the uninflated one because the added air has mass, so that end of the rod tips downwards. (2 marks)
Common mistake: Saying "air has weight" only. State clearly that air has mass (and therefore weight), which is why the balance tips.
Answer 14.
(3 marks — ½ mark per correct item)
| Solid | Liquid | Gas |
|---|---|---|
| chalk | honey | oxygen |
| stone | cooking oil | water vapour |
Teaching note: Honey and cooking oil flow and take their container's shape, so they are liquids even though they are thick (viscous).
Answer 15.
The particles in a gas are far apart and can move freely in all directions, so they spread out to fill the whole container. The particles in a solid are packed closely together in fixed positions and cannot move about, so a solid keeps its own shape. (3 marks)
Marking: 1 mark for gas particles free to move/spread; 1 mark for solid particles closely packed/fixed; 1 mark for linking particle behaviour to filling container vs keeping shape.
Answer 16.
Working: Volume of stone = reading in Cylinder Q − reading in Cylinder P = 65 cm³ − 50 cm³ = 15 cm³
Volume of stone = 15 cm³ (2 marks: 1 mark for correct method/subtraction, 1 mark for correct answer with unit)
Teaching note: The stone pushes aside (displaces) water equal to its own volume, so the water level rises by exactly the stone's volume.
Answer 17.
I do not agree with Ben. Matter is anything that has mass and occupies space. Clean air has mass and occupies space (for example, an inflated balloon is heavier than a flat one), so clean air IS matter even though we cannot see it. (2 marks)
Teaching note: Being visible is NOT a requirement for matter. Many kinds of matter, like air, are invisible.
Answer 18.
(a) It shows that a gas does not have a definite volume — its volume can be reduced (the gas can be compressed) when squeezed. (1 mark)
(b) No. Water is a liquid and liquids have a definite volume that cannot be compressed, so the plunger would hardly move down. (1 mark)
Teaching note: Gases can be compressed because their particles are far apart; liquids cannot be compressed noticeably because their particles are already close together.
Answer 19.
Step 1: Put some water in a measuring cylinder and read the starting volume. Step 2: Count out a number of identical beads (e.g., 20) and drop them ALL into the cylinder. Read the new volume and find the rise: new reading − starting reading. Step 3: Divide the rise in volume by the number of beads (e.g., rise ÷ 20) to get the volume of ONE bead. (3 marks — 1 mark per step)
Teaching note: Using many beads makes the total rise large enough to read accurately; dividing then gives the volume of one bead.
Answer 20.
At first, the bottle was sealed except for the opening covered by the balloon. The air already inside the bottle occupied space, so when Mei blew, there was no room for the balloon to expand — the trapped air pushed back on the balloon.
After the teacher made a hole, the trapped air could escape through the hole as the balloon grew. With the air no longer trapped inside, the balloon had room to expand, so Mei could blow it up easily. (3 marks)
Marking: 1 mark for identifying trapped air occupying space; 1 mark for explaining air escaped through the hole; 1 mark for linking this to the balloon being able to inflate.
Teaching note: This experiment shows that air occupies space — the key idea behind Question 8 and Question 4 as well.
END OF ANSWER KEY