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As the negative charge races down, the air surrounding it heats up. The spark is very hot at almost 20,000 degrees Celsius, and it rapidly heats the air to create a shock wave.
Considering light travels very fast – about 300 million meters per second and that sound only travels at 300 meters per second; light is a million times faster than the sound produced. To find out how far away the storm is, you can count how long you hear the sound after the lightning. For every 4 seconds between the flash and the rumble, the thunderstorm is 1 mile away.
4. What does the text tell us about?
A. Electricity.
B. Lightning.
C. Cloud.
D. Storm.
Kunci jawaban: B
5. The fourth paragraph is about… .
A. the general phenomena of lightning
B. the way how the shock wave is created
C. the speed of the light which is very fast
D. the process of changing water and ice into clouds
Kunci jawaban: B
6.“Clouds may look fluffy and innocent, but they are actually active things”. The underlined word is closest in meaning to ….
A. delicate
B. elastic
C. silky
D. soft
Kunci jawaban: D
The text is for number 7-9
