China builds massive radio antenna facility

China builds massive radio antenna facility

Assessment

Interactive Video

Science, Engineering

11th Grade - University

Hard

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The video discusses a radio antenna covering 3700 square kilometers, as reported by the South China Morning Post. This antenna can emit extremely low frequency (ELF) radio waves ranging from 0.1 to 300 Hertz. These waves can be detected by Chinese military submarines deep in the ocean. Additionally, the antenna has potential applications in detecting earthquakes and minerals.

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5 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the size of the land where the radio antenna is located?

3700 square kilometers

5000 square kilometers

2500 square kilometers

4200 square kilometers

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the frequency range of the ELF waves emitted by the radio antenna?

1 to 1000 Hertz

5 to 200 Hertz

10 to 500 Hertz

0.1 to 300 Hertz

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which military equipment could potentially use the ELF waves?

Drones

Chinese military submarines

Tanks

Military aircraft

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Besides military use, what is another application of the radio antenna?

Detecting earthquakes

Weather forecasting

Satellite communication

Traffic monitoring

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What else can the radio antenna detect apart from earthquakes?

Forest fires

Volcanic eruptions

Minerals

Tsunamis