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Quiz Chapter 9: Space Weather

10 questions ยท Form 3 Science Bab 9: Space Weather

Question 1 of 10Score: 0

How does space weather affect Global Positioning System (GPS) users on Earth?

Full Question List & Answer Key

Prefer reading to quizzing? All 10 questions are listed below with the answer and explanation under each one.

1. How does space weather affect Global Positioning System (GPS) users on Earth?

  1. It causes signal delays in the ionosphere, leading to positioning inaccuracies.
  2. It physically moves GPS satellites into different planet orbits.
  3. It completely blocks all mobile phone battery recharging.
  4. It changes ground geographical coordinates permanently.
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Answer: A

Geomagnetic disturbances alter ionospheric density, bending and delaying radio signals between GPS satellites and receivers.

2. Approximately how long is one complete cycle of sunspot activity (solar cycle)?

  1. 5 years
  2. 11 years
  3. 22 years
  4. 365 days
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Answer: B

Sunspot activity peaks and declines in a regular cycle lasting approximately 11 years.

3. Which chemical elements make up the vast majority of the Sun's mass?

  1. Carbon and Oxygen
  2. Hydrogen and Helium
  3. Silicon and Aluminum
  4. Nitrogen and Argon
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Answer: B

The Sun consists of roughly 73% hydrogen and 25% helium, with trace amounts of heavier elements.

4. What atmospheric phenomenon causes colorful glowing light displays near Earth's magnetic poles?

  1. Greenhouse effect
  2. Aurora
  3. Rainbow scattering
  4. Solar eclipse
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Answer: B

Auroras occur when energetic solar wind particles interact with oxygen and nitrogen gas molecules in the upper atmosphere near magnetic poles.

5. Which Earth protective structure deflects most energetic solar particles and prevents them from stripping away our atmosphere?

  1. Ozone layer
  2. Ionosphere
  3. Magnetosphere
  4. Stratosphere
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Answer: C

Earth's magnetosphere deflects solar wind and cosmic radiation, protecting the atmosphere and life on Earth.

6. Which human technology infrastructure on ground is most vulnerable to damage from severe geomagnetic storms?

  1. High-voltage electrical power grids
  2. Underground water supply pipelines
  3. Fiber optic internet cables
  4. Railway lines and tracks
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Answer: A

Geomagnetically induced currents (GICs) flow into power lines and can overload, damage, or burn out high-voltage transformers.

7. Why is high-frequency (HF) radio communication frequently disrupted during solar activity flares?

  1. Enhanced ionising radiation alters electron density in Earth's ionosphere.
  2. Solar flares absorb all atmospheric oxygen.
  3. Radio towers melt under increased ground heat.
  4. Sound waves cannot travel through vacuum space.
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Answer: A

Increased X-ray and UV radiation from solar flares ionizes the D-layer of the ionosphere, absorbing HF radio waves instead of reflecting them.

8. How can strong solar flares and coronal mass ejections (CMEs) affect artificial satellites orbiting Earth?

  1. By melting satellite outer metallic hulls immediately
  2. By causing electrical circuit glitches and increasing atmospheric drag
  3. By pulling satellites into deep space away from Earth
  4. By accelerating battery charge speeds uncontrollably
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Answer: B

Intense solar radiation expands Earth's upper atmosphere, increasing orbital drag while high-energy particles disrupt sensitive satellite electronics.

9. What causes the grainy pattern known as 'granules' on the Sun's photosphere surface?

  1. Metamorphic rock formations
  2. Convection currents of hot rising plasma and cooler sinking plasma
  3. Frequent meteoroid impacts on the solar surface
  4. Nuclear fission explosions occurring in the corona
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Answer: B

Granules are tops of convection cells in the solar mantle where hot plasma rises in the center and cools down at edges.

10. Which solar atmospheric layer is only fully visible to the naked eye during a total solar eclipse?

  1. Photosphere
  2. Corona
  3. Core
  4. Convective zone
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Answer: B

The outer corona is fainter than the bright photosphere, making it visible only when the moon completely blocks the photosphere during a total solar eclipse.

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