Homework Challenge: Science (Core Stability #8)

Science Homework (Year 11):  Core Stability #8

Please answer the following questions in your exercise book (entitled 'Core Stability #8')

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