1. What is matter? A) Anything that has a shape A) Amything that takes up space and has mass C) Amything that can be seen D) Anything that is a solid 2. What happens to the mass of a balloon when it is inflated? A) It decreases B) It stays the same C) It increases D) It changes shape 3. What is thermal conductivity? A) The ability to hold heat B) The ability to conduct heat C) The ability to create heat D) The ability to resist heat 4. Which of the following is a thermal insulator? A) Copper B) Iron (C) Wood D) Aluminium 5. What is the boiling point of water? A) 50^circ C (B) 100^circ C C) 150^circ C D) 200^circ C 6. Which material is commonly used for electrical wires? A) Plastic (B) Copper C) Wood D) Rubber

Here are the answers and explanations for the questions:**1. What is matter?****Answer:** **(B) Anything that takes up space and has mass****Explanation:** Matter is anything that has mass and takes up space. This means it has volume. **2. What happens to the mass of a balloon when it is inflated?****Answer:** **(B) It stays the same****Explanation:** When you inflate a balloon, you are adding air (which has mass) to the balloon. However, the mass of the balloon itself doesn't change. The air inside the balloon simply displaces the air that was previously in the balloon.**3. What is thermal conductivity?****Answer:** **(B) The ability to conduct heat****Explanation:** Thermal conductivity is a measure of how well a material can transfer heat. Materials with high thermal conductivity transfer heat quickly, while materials with low thermal conductivity are good insulators.**4. Which of the following is a thermal insulator?****Answer:** **(C) Wood****Explanation:** Wood is a good thermal insulator because it has a low thermal conductivity. This means it does not transfer heat easily. Copper, iron, and aluminum are good conductors of heat.**5. What is the boiling point of water?****Answer:** **(B) 100°C****Explanation:** The boiling point of water is the temperature at which it changes from a liquid to a gas (steam). At standard atmospheric pressure, this temperature is 100°C (212°F).**6. Which material is commonly used for electrical wires?****Answer:** **(B) Copper****Explanation:** Copper is a good conductor of electricity, which makes it ideal for use in electrical wires. It is also relatively inexpensive and easy to work with.