STAYING SAFE The school science website

1
(No Transcript)
2
STAYING SAFEThe school science website
These lessons are at www.westwightmiddle.iow.sch.u
k/sci/5_floating/floating.ppt
3
Index

• Lesson 1 How much space does a pebble take?
• Homework 1
• Lesson 2 How much does water weigh?
• Homework 2
• Lesson 3 Is salt water heavier than tap water?
• Homework 3
• Lesson 4 How well do things float in salt water?
• Homework 4
• Lesson 5 What happens when oil and water are
  mixed?
• Homework 5
• Lesson 6 What happens when you mix things with
  water?
• Homework 6
• Lesson 7 Why do things weigh less under water?
• Homework 7
• Lesson 8 Are things heavier or lighter than
  water?
• Homework 8
• Lesson 9 Can you make metal float?
• Homework 9

4
How much space does a pebble take?

• OBJECTIVES
• To learn how to measure volume.
• To learn how to use displacement cans.
• To learn how to use a measuring cylinder.
• Recording measurements in a table.

5
Equipment
6
Instructions

• Fill the can up to the overflow pipe.
• Put the pebble in the can.
• Catch the water that overflows.
• Measure how much water came out.
• Record your measurement on the table.

6. Now try some other materials.
7
Results
8
Graph
Use excel to draw a bar chart of your results
9
Homework
Describe todays science in your science notebook.
10
How much does water weigh?
What is the mass of water? How many grams?
11
OBJECTIVES

• To learn how to measure volume.
• To rectify misconceptions about MASS.
• To learn how to use a measuring cylinder.
• Recording measurements in a table.
• Writing about what you found out.

12
Equipment
scales
measuring cylinder
two plastic beakers
13
Instructions
1. Measure out 100 cm³ of tap water.
2. What is the mass of 100 cm³ of water? Measure
in grams
14
Record your measurements.
Try it again 5 times with different volumes of
water.
15
So, what did you find out?
Work in pairs. Write your ideas on a mini
whiteboard.
16
Homework
Write in your science notebook to describe what
you found out.
17
Is salt water heavier than tap water?
Does salt water have a greater mass?
18
OBJECTIVES
Writing a prediction. Planning a fair
test. Recording measurements in a table. Learning
about dissolving. Writing about what you found
out.
19
Is salt water heavier than tap water?

• The factor I will change.
• The factor I will measure.
• The factors I will keep the same.

• How much water.
• How salty the water is.
• The beaker I put the water in.
• The mass of the water.

Invite students to draw lines between the list on
the left and the list on the right.
What are variables?
20
Is salt water heavier than tap water?

• The factor I will change.
• The factor I will measure.
• The factors I will keep the same.

• How much water.
• How salty the water is.
• The beaker I put the water in.
• The mass of the water.

21
1. Prediction
22
2. Instructions
23
Fair test
3. To make the test fair, what will you keep the
same? To make my test fair I will 4. What will
you measure? I will measure the
24
Record your measurements
25
What I found out...
6. Describe what happened.   7. Try to explain
why. 8. Complete for homework.
26
How well do things float in salt water?
27
OBJECTIVES
Making a test fair.   Making careful measurements
in mm.   Recording measurements.   Making a graph
of results.   Writing about why things happen.
28
How well does the straw float?
Equipment
straw
Plasticine blob
29

• How will you know if the straw floats better in
  salt water?
• To make the test fair, what will you keep the
  same?
• What will you measure?

30
How well do things float in salt water?

• The factor I will change.
• The factor I will measure.
• The factors I will keep the same.

• How high the straw floats.
• How salty the water is.
• The straw.
• The volume of water.
• The temperature of the water.

31
How well do things float in salt water?

• The factor I will change.
• The factor I will measure.
• The factors I will keep the same.

• How high the straw floats.
• How salty the water is.
• The straw.
• The volume of water.
• The temperature of the water.

32
(No Transcript)
33
(No Transcript)
34
Homework

• Complete your learning at home.

35
What happens when oil and water are mixed?
36
OBJECTIVES Learning that there are different
types of liquid. Describing what
happened. Explaining why things happen.
37
What happens when oil and water are mixed?

• Work in a group of 4.
• Write your ideas on a mini whiteboard.

38

• Half fill the tube with tap water.
• Add a little oil.
• Shake well to mix.

4. Stand the tube on the table and watch.
39
5. Draw what you see. 6. Add labels to show the
oil and the water.
7. Write to describe what happened. 8. Try to
explain why.
40
Homework

• Complete todays description and explanation in
  your science notebook.

41
What happens when you mix things with water?
42
OBJECTIVES

• Following instructions carefully.
•  
• Using a table for your observations.

43
Question (What I want to find out)
What happens when you mix things with water?
44
Equipment

• sand
• sawdust
• salt
• chalk powder
• sugar

test tubes in a rack
45
Add a spatula of sand to the first tube. Add a
spatula of sawdust to the second tube and so on.
46
(No Transcript)
47
Homework

• Write and draw about what you noticed today.

48
Why do things weigh less under water? 
49
OBJECTIVES

• Learning about the forces that make things float
  and sink.
• Learning how to use a force meter.
• Recording measurements in a table.
• Making a graph.
• Using the idea of forces to explain what happens.

50
Equipment
objects to test
51
Method

• Weigh stones and other objects in air and in
  water.
• Record your results.

52
Results
53
Conclusion

• Use a computer to draw a graph (bar chart).
• Write to describe what you noticed.
• Write to explain why.

54
Homework

• Draw a diagram of what you did today in your
  science notebook.

55
Are things heavier or lighter than water?
56
OBJECTIVES

• Following written instructions.
• Making careful measurements of mass.
• Comparing measurements of mass.
• Measuring volume.
• Noticing patterns in results.
• Describing what happens.

57
Equipment
and objects to test
58
Instructions

• 1. Get a stone. Measure its mass in grams.
• 2. Fill a displacement can to overflowing.
• 3. Put the stone into the displacement can and
  catch the water that overflows.
• 4. The water you caught has the same volume as
  the stone.
• 5. Which is heavier, the stone or the water?
  Record your results.
• 6. Now try again with a different object.

59
Results
60
Conclusion...

• Write to describe what happened.

61
Homework

• Draw a storyboard of the experiment you did today.

62
Can you make metal float?
63
Objective

• Writing to describe what you did.

64
Instructions (method)

• 1. Use a piece of kitchen foil to make a boat.
• 2. Test it and make sure it floats.
• 3. Add masses, 1g at a time until the boat sinks.
• 4. Could you improve the boat to make it hold
  more mass?
• 5. Write to describe what you did.

65
Homework 8

• Continue your learning at home.
• Write or draw about what you did and what you
  found out.

66
(No Transcript)