Page 176 - Science Coursebook
P. 176
Unit 11
Unit 11 End of unit questions
11.1 Here is a list of four different fuels:
wood coal uranium natural gas
a Which one is an example of a nuclear fuel? [1]
b Which one is an example of a biofuel? [1]
c Which two are examples of fossil fuels? [1]
d Which one is an example of a renewable resource? Explain your answer. [2]
11.2 The diagram shows a photovoltaic cell (a solar cell).
a What energy change takes place when the cell absorbs sunlight? [2]
b State one other way in which sunlight can be used as an energy resource. [1]
c Explain why sunlight is described as a renewable energy resource. [1]
11.3 Here are three ways in which energy may be transferred from a hotter place to
a colder place:
conduction convection radiation
For each of the statements below, decide which method of transfer it describes.
a Warm air rises above a hot road surface. [1]
b The planet Venus is warmed by energy from the Sun. [1]
c Energy travels quickly along a steel rod but more slowly along a glass rod. [1]
d When a fluid is heated, its density decreases and it floats upwards. [1]
e Energy is passed from one vibrating particle to the next. [1]
f Energy is transferred through a vacuum (empty space). [1]
174 11 Energy
