 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: Heat Homework Wk 5 |
Question 1.
The table below shows the ways in which heat is lost from a house.
a)What was the percentage heat loss for the floor?
b) Use the table of results, including your value for heat loss from the floor, to draw a graph that shows how heat is lost from the home.
Question 2.
What are the major parts of the Space Shuttle’s thermal protection system?
Question 3.
What temperature do the tiles and blankets need to withstand?
Question 4.
What temperature can the cement that holds the tiles and blankets onto the Space Shuttle withstand?
Question 5.
What must be done to the Thermal Protection System in between Space Shuttle missions?
Question 6.
If you were a NASA engineer trying to improve on the design of the TPS for the Space Shuttle, what would you try to improve?
Question 7.
Look at the drawing below of two matches.
Match X lights before match Y because….
| A. | air does not conduct heat | |
| B. | metal does not conduct heat | |
| C. | metal is a better conductor of heat than air | |
| D. | metal is a poorer conductor of heat than air | |
Question 8.
A man fell overboard from a yacht. His friend rescued him from the sea 20 minutes later. The sea temperature was 8 C and the air temperature was only 4 C, yet the man in the sea developed hypothermia, but the man in the yacht did not, despite them both being dressed the same. The man in the sea developed hypothermia because
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| A. | he swallowed some seawater | |
| B. | air is a better conductor of heat than water | |
| C. | the sea convected his heat away | |
| D. | water is a better conductor of heat than air | |
Question 9.
The same volume of water is put into the two cups in the diagram below. Which line in the table shows the temperatures after 10 minutes?
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| A. | A | ||
| B. | B | ||
| C. | C | ||
| D. | D | ||
Question 10.
The coffee in a coffe cup with a lid on, stays hotter longer because……
| A. | the lid stops heat conducting out of the cup | |
| B. | the lid stops heat convecting out of the cup | |
| C. | you can fill a coffee cup higher when the lid is on it | |
| D. | the lid keeps out the cold | |
Question 11.
The diagram below shows an experiment investigating heat conduction.
From the results, what is rod Y made from?
| A. | iron | |
| B. | glass | |
| C. | copper | |
Question 12.
A glider can fly for hours using
| A. | a dull metal surface | |
| B. | conduction currents in the air | |
| C. | convection currents in the air | |
| D. | radiation currents in the air | |
