Science Exercise: Properties of Matter
1. Multiple Choice Questions
Instructions: Darken the circle or select the correct option.
(i) The space occupied by an object is called:
(a) Matter
(b) Mass
(c) Volume
(d) Area
(ii) Which of the following is transparent?
(a) Wood
(b) Glass
(c) Iron
(d) Paper
(iii) Which of the following is translucent?
(a) Tumbler
(b) Mirror
(c) Oiled paper
(d) Steel glass
(iv) Find the odd one out:
(a) Gold
(b) Aluminium
(c) Copper
(d) Bamboo (Reason: The others are metals).
2. Solubility Chart
Identify whether the following substances are soluble or insoluble in water:
| Substance | Solubility |
| (a) Sugar | Soluble |
| (b) Coconut oil | Insoluble |
| (c) Sand | Insoluble |
| (d) Honey | Soluble |
| (e) Chalk powder | Insoluble |
| (f) Rice powder | Insoluble |
| (g) Salt | Soluble |
3. Short Answer Questions
Q: What is matter? Explain with examples. Ans: Matter is anything that has mass and occupies space. Examples include water (liquid), iron (solid), and air (gas).
Q: Which two properties prove that a stone is matter? Ans: We can identify a stone as matter because:
Mass: It has a measurable weight.
Volume: It occupies physical space.
Q: List four materials that can be used to make a tumbler. Ans: Tumblers can be made from:
Glass
Plastic
Ceramic
Stainless steel
Q: What is Lustre? Ans: Lustre is a physical property of a material that describes how its surface reflects light, making it appear shiny or bright. Most metals possess lustre.
4. True or False
(a) Wood is transparent, but glass is opaque. (Incorrect)
(b) Sawdust is soluble in water. (Incorrect)
(c) Salt is soluble in water. (Correct)
(d) A piece of wood floats in water. (Correct)
(e) Coconut oil is soluble in water. (Incorrect)
(f) Glycerine is soluble in water. (Correct)
(g) Copper and iron are lustrous materials. (Correct)
(h) Air is transparent. (Correct)
5. Matching Exercises
A. Match the Objects to Materials:
| Object | Material |
| Notebook | Paper |
| Nail | Iron |
| Chair | Wood |
| Tumbler | Glass |
| Thread | Cotton |
B. Match the Objects to Properties:
| Object | Primary Property |
| Steel plate | Lustrous |
| Glass bottle | Transparent |
| Wooden block | Opaque |
| Salt | Soluble in Water |
6. Fill in the Blanks
The same object can be made of different materials.
The method of arranging objects into groups is called classification.
The amount of matter present in an object is its mass.
The space occupied by an object is its volume.
7. Application & Practical Tasks
Q: If you were asked to design a new school desk that is strong, lightweight, and durable, which materials would you select?
Ans: I would select a combination of high-grade plastic and hollow steel tubing (metal). I would prioritize materials that offer a high strength-to-weight ratio to ensure the desk is durable enough for daily use but light enough to be moved easily.
Q: Record your observations for mixing the following substances in water:
| Substance | Observation |
| Sand | Insoluble |
| Salt | Soluble |
| Lemon juice | Soluble |
| Shampoo | Soluble |
9. Advanced Application Questions
Q1. Why do some heavy objects, like a large wooden log, float in water, while a tiny iron nail sinks? Ans: This happens because of a property called density. Even though a log is heavy, it is less dense than water, so it floats. An iron nail is very small but much denser than water, causing it to sink.
Q2. Classify the following materials based on their magnetic properties:
(a) Iron nail
(b) Plastic ruler
(c) Steel spoon
(d) Eraser
(e) Nickel coin
Ans: * Magnetic: Iron nail, Steel spoon, Nickel coin.
Non-magnetic: Plastic ruler, Eraser.
Q3. Fill in the blanks regarding the States of Matter:
Solids have a definite shape and a definite __________.
Liquids take the shape of the __________ they are poured into.
Gases can be easily compressed because there is a lot of __________ between their particles.
Ans: (1) Volume, (2) Container, (3) Space.
Q4. What is the difference between a Hard material and a Soft material? Give one example of each. Ans: * Hard materials are difficult to compress, cut, or scratch (e.g., Diamond or Iron).
Soft materials can be easily compressed or scratched (e.g., Sponge or Cotton).
Q5. Critical Thinking: Why is a cooking pot usually made of metal, but its handle is made of plastic or wood?
Ans: Metals are good conductors of heat, which helps in cooking the food quickly. However, plastic and wood are insulators (poor conductors), which prevents the handle from getting hot and allows us to hold the pot safely.
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