| Homework |
|
Topic: |
| Question 1 |
Nanotechnology controls structures which range in size from 1 to ____ nm in size. |
C2 |
| Question 2 |
As the distance from the source of EM radiation increases the intensity (stays the same/ increases/ decreases). Delete the wrong ones! |
P2 |
| Question 3 |
1000J of energy is put into a motor and we get 850J of useful movement out of the motor. What is the efficiency of the motor? |
P3 |
| Question 4 |
The absorption/ reflection of infra-red radiation by gases in the atmosphere when it is given out by the Earth causes the Earth's temperature to (increase/ stay the same/ decrease). |
P2 |
| Question 5 |
Why are the telescopes that are in orbit around the Earth much better for viewing stars than those on the Earth? |
P1 |
| Question 6 |
Selective breeding and natural selection are similar. Why is the selective breeding more dangerous for the organism? |
B3 |
| Question 7 |
Fatty deposits in the blood vessels supplying the heart can result in which event? |
B2 |
| Question 8 |
Name a natural way in which gases and particulates may be released into the Earth's atmosphere. |
C1 |
