 This Homework requires GRAPH PAPER! |
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| In your jotter write the DATE in the margin. Now add a TITLE for your homework. Your title should be the name of the Homework: Matter Homework Wk 5 |
Question 1. |
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 Angus noticed that when he sucked out all of the air out of a plastic milk container it collapsed. His friend Gordon said it collapsed because he had sucked it in. Angus thought Gordon was wrong and that it had something to do with air pressure.Write an explanation for Angus about what is happening to the particles on the inside and the outside of the container.Use diagrams to help. |
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Question 2. |
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| The graph below shows what happens to the mass of solid dissolving as the temperature of the water is increased.
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| a) | How does the temperature of the water affect the mass of solid dissolved? |
| b) | What mass of solid dissolves at 28°C? |
| c) | At what temperature will 45g of solid dissolve? |
| d) | Suggest a title for this graph. |
Question 3. |
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| When Julia looked up the densities of some of different substances she found the following information. | |
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| Present the data from the table as a bar chart. | |
Question 4. |
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| The diagram below shows a tall beaker with four different liquids and their densities. | |
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| If a ball that has a density of 1.73 g/cm3 is placed in the beaker, where will the ball come to rest? | |
Question 5. |
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| Floating pieces of glacial ice are called icebergs. Huge pieces of glacial ice near a coast may break off and fall into the ocean, as shown in the cross-section below. | |
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| Only about one tenth of the total iceberg is visible above the surface of the water. | |
| a) | Explain why an iceberg floats in the ocean. |
| b) | Describe one change in the environment that would occur if all the glaciers on Earth melted. |
