Short & Long Questions: Matter | Eureka Plus Class 5: Book Solutions, Notes & Worksheets PDF Download

Short Answer Questions

Q1: What are the two things that matter has?
Ans: Matter has mass and volume.

Q2: What are molecules made of?
Ans: Molecules are made up of even smaller particles called atoms.

Q3: Give an example of a substance that is an element.
Ans: Oxygen is an example of an element.

Q4: Explain what a compound is.
Ans: A compound is a substance made of more than one kind of atom.

Q5: Name one element and its symbol.
Ans: Hydrogen - H.

Q6: In a ball and stick model, what do different colored beads represent?
Ans: Different atoms are represented by different colored beads.

Q7: What determines the state of matter?
Ans: The arrangement of molecules and the force of attraction between them.

Q8: Which state of matter has molecules that are tightly packed?
Ans: Solids have tightly packed molecules.

Q9: Explain a physical change with an example.
Ans: Melting wax is a physical change because it can be reversed by cooling.

Q10: Give an example of a chemical change.
Ans: Heating sugar until it turns into a black substance (carbon).

Long Answer Questions

Q1: Describe the three states of matter and explain their differences.
Ans: Matter can exist as solids, liquids, and gases. Solids have tightly packed molecules, liquids have molecules that can move but stay close, and gases have molecules that can move freely and spread out.

Q2: Explain how molecules change their arrangement when a substance is heated.
Ans: Heating adds energy to molecules, making them move further apart. This changes a solid into a liquid and a liquid into a gas.

Q3: Differentiate between an element and a compound, giving examples.
Ans: An element is made of only one kind of atom, like oxygen (O). A compound has different kinds of atoms, like water (H₂O).

Q4: Why is water an exception when it comes to states of matter?
Ans: Water can exist as a liquid and a gas at room temperature, unlike most substances.

Q5: Draw a ball and stick model of a compound and explain what it represents.
Ans: Draw atoms represented by colored beads to show how different atoms join to form a compound.

Q6: What happens to molecules in a gas when compared to molecules in a solid?
Ans: In a gas, there is hardly any force of attraction between molecules, allowing them to move freely. In a solid, molecules are tightly packed.

Q7: Explain why a physical change is reversible with an example.
Ans: Melting wax is a physical change. When warm liquid wax cools, it becomes solid again, showing reversibility.

Q8: Discuss the role of heating and cooling in changing states of matter.
Ans: Heating makes molecules move apart, changing a solid to a liquid and a liquid to a gas. Cooling does the opposite.

Q9: Give two examples each of an element and a compound, stating their symbols.
Ans: Element examples: Hydrogen (H), Oxygen (O). Compound examples: Water (H₂O), Carbon Dioxide (CO₂).

Q10: Explain why a chemical change is irreversible with an example.
Ans: When sugar is heated continuously, it changes into a new substance (carbon). We cannot get the sugar back from the carbon, making it irreversible.