A student investigated the rate of heat transfer from four identical containers of water. The water was heated to different temperatures (shown below) and she noted the temperature drop during the first two minutes of cooling. Which answer puts them in the correct order, from lowest rate to highest rate? Container A: 35 C Container B: 55 C Container C: 45 C Container D: 80 C
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A, B, C, D
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D, C, B, A
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A, C, B, D
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D, B, C, A
Q.2.
During the winter, moisture often condenses on the inside of windows of old houses. This rarely happens during the summer. Which of the following is likely to be the main reason for this?
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There are no plants actively growing in the winter to absorb the moisture for photosynthesis
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The glass of the window is colder in the winter than it is in the summer
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Central heating systems used in winter give off moisture
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Winters are cloudier than summers
Q.3.
The rate at which an object transfers thermal energy depends on what?
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Its surface area
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Its volume and what it is made from
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The nature of the surface with which it is in contact
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All of the above
Q.4.
Which of the following statements is ?
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Conduction involves thermal energy being passed between vibrating particles
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Solids are better heat conductors than liquids and gases
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Plastic is a good insulator because it contains free electrons
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When a liquid is evaporating it cools down
Q.5.
At the back of a refigerator there is a condenser which is designed to change the hot refrigerant gas into a liquid. The tubes of the condenser are attached to hundreds of small metal 'fins'. Why?
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To make the process of condensation work more efficiently
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To make the refrigerator look good
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For insulation so that the food inside stays cold
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To protect the condenser tubes
Q.6.
Based on the information that " ", which of the following statements is true?
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Ether must be a colourless liquid
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Ether must be a colourless solid
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Ether will make a surface cooler than water would
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Water will make a surface cooler than ether would
Q.7.
Why are cooling fins thin and flat?
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To give them a small surface area
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To make them as light as possible
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To make them fit into place better
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To give them a large surface area compared to their volume
Q.8.
In which direction does thermal energy (heat) flow?
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Cold to hot
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Hot to cold
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All directions
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It depends on the exact situation
Q.9.
A student investigated the rate of heat transfer from four identical containers of water. The water was heated to different temperatures (shown below). She then placed containers B and C in a freezer at -5 C and containers A and D in a room with a temperature of 20 C, and noted the temperature drop during the first two minutes of cooling. Which of the following statements is correct? Container A: 35 C Container B: 55 C Container C: 45 C Container D: 80 C
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Container D cooled the fastest
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Container B and container D cooled at the same rate
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Container A cooled the fastest
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Container B and container C cooled faster than all of the others
Q.10.
During the cold weather, birds can often appear bigger than they do when the weather is warm. Which of the following is the most likely explanation?
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Muscles in their skin lift their feathers further away from their body than in the summer
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People put out food for the birds so they eat more
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They do it to try to attract a mate
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There are no leaves on the trees so they just look bigger when really they are the same size
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