Multiple-choice questions:
1. Which of the following is matter?
a) Sunlight
b) Air
c) Heat
d) Sound
2. Which property of matter determines its state?
a) Mass
b) Volume
c) Density
d) Temperature
3. The unit for measuring temperature on the Celsius scale is:
a) Kelvin (K)
b) Fahrenheit (°F)
c) Degree Celsius (°C)
d) Degree Kelvin (K)
4. Which phenomenon occurs when heat energy is transferred between two substances in contact?
a) Convection
b) Conduction
c) Radiation
d) Evaporation
5. The process by which solids or liquids change into a gaseous state is called:
a) Melting
b) Condensation
c) Freezing
d) Sublimation
Short-answer questions:
1. Differentiate between the three states of matter based on their molecular arrangement and motion.
2. Explain the difference between homogeneous and heterogeneous mixtures. Give an example of each.
3. Describe the concept of diffusion and provide a real-life example of it.
4. How do the particles behave when a substance changes from solid to liquid to gas?
5. Explain the process of sublimation using a suitable example.
Extended-response questions:
1. Discuss the properties of matter and their importance in understanding the behavior of different substances in our surroundings.
2. Write a detailed explanation of the methods used to separate mixtures, such as filtration, evaporation, and distillation, and their applications in daily life.
3. Analyze the role of temperature and pressure in changing the state of matter, and provide examples to support your explanation.