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# Buoyancy - Cody

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### Buoyancy - Cody

1. 1. Floating and sinking
2. 2. Floating and sinking Made by Cody
3. 3. An investigation - what ﬂoats and what sinks?
4. 4. An investigation - what ﬂoats and what sinks? Object Predict What happened My thinking Tennis ball Both Half in the water and half out because it has some air Apple Sink 1/4 is out the water and 3/4 tiny little holes in the water Peg Float It sank!!! it has metal Chalk Sink Float for 2 sec then sank it has tiny holes Pumice Rock Sink 1/4 is out the water and 3/4 it has holes in the water itʼs old Tinfoil Both 1/4 in and 1/2 out itʼs light Sponge Float We pushed it down it has holes we took the bubbles out Lid Float We pushed it down water can carry weight Ping pong ball Float We pushed it down but it itʼs light went back up
5. 5. Float means to stay on the water.
6. 6. Float means to stay on the water. The ball is ﬂoating
7. 7. Float means to stay on the water. The ball is ﬂoating The ball is ﬂoating
8. 8. Float means to stay on Sink means to go under the the water. water. The ball is ﬂoating The ball is ﬂoating
9. 9. Float means to stay on Sink means to go under the the water. water. The ball is ﬂoating The ball is ﬂoating The ball is sinking
10. 10. What happens when you push a balloon into water?
11. 11. What happens when you push a balloon into water? The water is 111cm high. The balloon is ﬂoating It’s full of air
12. 12. What happens when you push a balloon into water? The balloon is being pushed down by my The water is hand.It’s full 111cm high. of air.The water is trying The to push the The water is balloon is balloon back 175 cm high. ﬂoating up It’s full of air
13. 13. What happens when you push a balloon into water? The balloon is being pushed down by my The water is hand.It’s full 111cm high. of air.The water is trying The to push the The water is balloon is balloon back 175 cm high. ﬂoating up It’s full of air Scientists use the word displacement to describe this idea.
14. 14. Archimedes was a man who lived a long time ago in Greece. He found out about water displacement. They say it happened when he got into his bath.
15. 15. Archimedes was a man who lived a long time ago in Greece. He found out about water displacement. They say it happened when he got into his bath.
16. 16. Archimedes was a man who lived a long time ago in Greece. He found out about water displacement. They say it happened when he got into his bath.
17. 17. Archimedes was a man who lived a long time ago in Greece. He found out about water displacement. They say it happened when he got into his bath. He jumped out the bath and ran out shouting, “Eureka!” This means “I have found it!” People said he was so happy
18. 18. Archimedes was a man who lived a long time ago in Greece. He found out about water displacement. They say it happened when he got into his bath. He jumped out the bath and ran out shouting, “Eureka!” This means “I have found it!” People said he was so happy
19. 19. Archimedes was a man who lived a long time ago in Greece. He found out about water displacement. They say it happened when he got into his bath. Our class read a book written by He jumped out the bath and ran out Pamela Allen about Mr shouting, “Eureka!” This means “I have Archimedes and his bath. found it!” People said he was so happy
20. 20. How much space does a balloon take in the water?
21. 21. How much space does a balloon take in the water? Our method:
22. 22. How much space does a balloon take in the water? Our method: 1.We ﬁlled a container with water right to the top. 2.We put the container in a large bowl. 3.We gently pushed the balloon into the container using a ﬂat board. 4.we poured the water that over ﬂowed in a measuring jug. 5.The amount of water that displaced was 1000mls.
23. 23. How much space does a balloon take in the water? Our method: 1.We ﬁlled a container with water right to the top. 2.We put the container in a large bowl. 3.We gently pushed the balloon into the container using a ﬂat board. 4.we poured the water that over ﬂowed in a measuring jug. 5.The amount of water that displaced was 1000mls.
24. 24. Hypothesis If an object weighs less than the water it displaces,than the object will float so... if an object weighs less than the water it displaces,than the object will sink.
25. 25. Hypothesis If an object weighs less than the water it displaces,than the object will float so... if an object weighs less than the water it displaces,than the object will sink. We tested the hypothesis We designed an experiment
26. 26. Hypothesis If an object weighs less than the water it displaces,than the object will float so... if an object weighs less than the water it displaces,than the object will sink. We tested the hypothesis We designed an experiment 2.Carefully put the object 3. Pour the 1.weigh in a full bucket displaced the water carefully 4. Weigh the of water. Make object into a small water sure the bucket of container. water is sitting in a large 5. Compare bowl. the weight
27. 27. objects weight of the object weight of the water it displaces
28. 28. big candle 1702 g objects 1739 g weight of the the object water is heavier weight the of the candle is water it lighter displaces the candle ﬂoated
29. 29. big candle 1702 g big rock objects 1739 g 1989 g weight the 1350 g of the object water is the rock heavier is weight the heavier of the candle is the water it lighter water is displaces the lighter candle the rock sank ﬂoated
30. 30. big candle tin of 1702 g big rock objects tomatoes 1739 g 1989 g weight 475 g the 1350 g of the 331 g object water is the rock heavier is the tin is weight the heavier heavier of the candle is the the water it lighter water is water is displaces the lighter lighter candle the tin the rock sank ﬂoated sank
31. 31. we big recorded candle the results tin of 1702 g big rock objects tomatoes 1739 g 1989 g weight 475 g the 1350 g of the 331 g object water is the rock heavier is the tin is weight the heavier heavier of the candle is the the water it lighter water is water is displaces the lighter lighter candle the tin the rock sank ﬂoated sank
32. 32. we big recorded candle the results tin of 1702 g big rock objects eureka! tomatoes 1739 g 1989 g weight the 475 g the 1350 g hypothes of the 331 g object water is the rock is is heavier is the tin is weight correct the heavier heavier of the candle is the the water it lighter water is water is displaces the lighter lighter candle the tin the rock sank ﬂoated sank