Question

3 Read the sentences and then choose the correct timekeeping device (a-c). 1 This device burns fat to mark the passing of time. a atomic clock b candle clock c hourglass 2 In this device, electricity is used to make a crystal vibrate to measure time. a quartz wristwatch b water clock c mechanical clock 3 This device uses a shadow on a flat surface to tell the time. a pendulum clock b hourglass c sundial 4 A long metal weight swings from side to side to measure time. a atomic clock Wob candle clock c pendulum clock 5 This device uses water filling up and emptying from a vessel to measure time. a water clock b mechanical clock c hourglass 6 This device measures time by using the electromagnetic signals of electrons when they change energy levels. a quartz wristwatch b atomic clock

Answer 1

c hourglass

a quartz wristwatch

c sundial

c pendulum clock

a water clock

b atomic clock

Answer 2

1. This device burns fat to mark the passing of time. - b candle clock
2. In this device, electricity is used to make a crystal vibrate to measure time. - a quartz wristwatch
3. This device uses a shadow on a flat surface to tell the time. - c sundial
4. A long metal weight swings from side to side to measure time. - c pendulum clock
5. This device uses water filling up and emptying from a vessel to measure time. - a water clock
6. This device measures time by using the electromagnetic signals of electrons when they change energy levels. - b atomic clock