1. 19/04/2010 (Day 3) WELCOME http://plkclscmc-timothy.viviti.com/

2. Experiment 6.13 (P.142) 1. Find out its mass 2. Find out its volume 3. Calculate its density

3. Experiment 6.13 (P.142) If I measure the volume of a floating object, what can I do?

4. Experiment 6.13 (P.142) - Block: Iron, Aluminium, Cork 1/each - Measuring Cylinder1 - Electronic Balance1 - Thread3

5. Experiment 6.13 (P.142) Precautions - To lie down the measuring cylinder in the box. - To tie the blocks tightly.

6. Experiment 6.13 (P.142) 1. Find out its mass 2. Find out its volume 3. Calculate its density TIME: 20MINS

7. Experiment 6.13 (P.142) ObjectMass(g)volumedensity Iron Aluminium Cork

8. Experiment 6.13 (P.142) 3. Arrange the objects in ascending order of density. __________________________ Cork, Aluminium, Iron

9. Sinking and floating (P.144) An object floats or sinks depends on its density.

10. Activity Corner C (P.144) 1(a) Polystyrene, oil and ice are above the water layer.

11. Activity Corner C (P.144) 1(b) These substances are floating on water because they are _____________ than water. less dense

12. Activity Corner C (P.144) 2(a) Ice, water, iron nail and mercury are below the water layer.

13. Activity Corner C (P.144) 2(b) These substances sink below oil because they are _____________ than oil. denser

14. Activity Corner C (P.144) 3. Polystyrene, oil, ice, water, iron nail, mercury.

15. Activity Corner C (P.144) If an object is denser than a liquid it ___________ the liquid. If an object is less dense than a liquid, it ___________ the liquid. sinks on floats on

16. Particle models and density (P.146) Mass of particles

17. Particle models and density (P.146) Packing of particles

18. SPECIAL QUESTION(P.145) Why do metal ships float?

19. Experiment 6.14 (P.142) Making a hot air balloon

20. Experiment 6.14 (P.142) 2. Light the Bunsen burner. What happens to the plastic bag? _________________ The plastic bag rises

21. Experiment 6.14 (P.142) Making a hot air balloon

22. Experiment 6.14 (P.142) 2.(a) The movement of air particles inside the bag becomes _________. faster 2.(b) The air particles inside the bag move _____________. further apart

23. Experiment 6.14 (P.142) 2.(c) The density of air inside the bag _________. decreases 2.(d) The density of air inside the bag is _________ than that of the air outside. lower

24. Experiment 6.14 (P.142) 3. Hot air balloons can rise because the density of air inside is smaller than that outside.

25. HOMEWORK Experiment 6.13