Activity 5.1:
(A) Aim: To show that living and non-living things have mass and occupy space
Materials and apparatus: Lever balance, beaker, soil, water, bean sprouts
Instruction
1. Weigh an empty beaker with a lever balance. Record its mass.
2. Fill half of the beaker with soil. Does the soil occupy space inside the beaker?
3. Weigh the beaker with the soil by using the lever balance as shown in Figure 5.1. Does soil have mass?
4. Repeat steps 1 – 3 by replacing soil with water and bean sprouts.
5. Complete the table below.
Questions
1. Classify the materials in this activity into living and non-living things.
2. Are soil, water and bean sprouts matter? Explain your answer.
3. Give five other examples of things that are matter.
Answer:
(A)
1. Living things: Bean sprouts. Non-living things: Soil and water
2. Soil, water and bean sprouts are matter because they have mass and occupy space.
3. Book pencil, car, computer and glass
(Any other answers are accepted)
(A) Aim: To show that living and non-living things have mass and occupy space
Materials and apparatus: Lever balance, beaker, soil, water, bean sprouts
Instruction
1. Weigh an empty beaker with a lever balance. Record its mass.
2. Fill half of the beaker with soil. Does the soil occupy space inside the beaker?
3. Weigh the beaker with the soil by using the lever balance as shown in Figure 5.1. Does soil have mass?
4. Repeat steps 1 – 3 by replacing soil with water and bean sprouts.
5. Complete the table below.
Questions
1. Classify the materials in this activity into living and non-living things.
2. Are soil, water and bean sprouts matter? Explain your answer.
3. Give five other examples of things that are matter.
Answer:
(A)
1. Living things: Bean sprouts. Non-living things: Soil and water
2. Soil, water and bean sprouts are matter because they have mass and occupy space.
3. Book pencil, car, computer and glass
(Any other answers are accepted)
(B) Aim: To show that air has mass and occupies space:
Materials and apparatus: Balloons, pin, rope, cellophane tape, wooden rod.
Instruction
1. Blow up two balloons and make sure they are of the same size.
2. Stick a piece of cellophane tape on one of the balloons.
3. Attach the balloons to a wooden rod. Balance both balloons (Figure 5.2).
4. Use a pin to prick the balloon through the cellophane tape. Observe any changes.
Questions
1. Did the balloons expand when you blew them up? Why?
2. What happened to the wooden rod when one of the balloons was pricked with the pin?
3. Why do we stick a cellophane tape to the balloon that we want to prick?
Conclusion
What conclusion can you make from these activities?
Answer:
(B)
1. Yes, the balloon expands because air occupies space.
2. The wooden rod becomes imbalanced because air escaped from the balloon that was pricked with a pin and caused the balloon to become lighter. This proves that air has mass.
3. Cellophane tape is stuck on the balloon to prevent the balloon from bursting when it is pricked with a pin. This is to ensure fair comparison between the mass of both balloons.
Materials and apparatus: Balloons, pin, rope, cellophane tape, wooden rod.
Instruction
1. Blow up two balloons and make sure they are of the same size.
2. Stick a piece of cellophane tape on one of the balloons.
3. Attach the balloons to a wooden rod. Balance both balloons (Figure 5.2).
4. Use a pin to prick the balloon through the cellophane tape. Observe any changes.
Questions
1. Did the balloons expand when you blew them up? Why?
2. What happened to the wooden rod when one of the balloons was pricked with the pin?
3. Why do we stick a cellophane tape to the balloon that we want to prick?
Conclusion
What conclusion can you make from these activities?
Answer:
(B)
1. Yes, the balloon expands because air occupies space.
2. The wooden rod becomes imbalanced because air escaped from the balloon that was pricked with a pin and caused the balloon to become lighter. This proves that air has mass.
3. Cellophane tape is stuck on the balloon to prevent the balloon from bursting when it is pricked with a pin. This is to ensure fair comparison between the mass of both balloons.