Abeka 8th Science Quiz 20 L91

The doughnut-shaped regions of charged particles encircling the earth's equator are called the __________ radiation belts.

• Van Allen
• Hubble
• Fermi
• Karman

The extremely powerful radiation that comes from deep space is _______ rays.

• cosmic

• x-ray
• beta
• alpha

Atmospheric pressure at sea level is normally _______ millibars.

• 1000

• 1013

• 2013

• 500

On the side away from the sun, Earth's magnetic field stretches out to form the ________.

• magnetosphere
• ionosphere
• radiation belt
• magnetotail

What is a special state of matter made of a mixture of electrons and positive ions?

• Solid
• Liquid
• Plasma
• Gas

What is the stream of harmful, charged particles sent out by the sun?

• solar flare
• stellar wind
• solar wind
• cosmic rays

What term refers to either of the two locations where an object's magnetism is located?

• Magnetic poles
• Magnetic fields
• Magnetic centers
• Electromagnetic zones

What is the region of the earth's magnetic field that is influenced by the solar wind?

• Lithosphere
• Stratosphere
• Ionosphere
• Magnetosphere

Why do auroras only occur at high latitudes?

• Auroras can occur anywhere on Earth due to weather patterns.
• Charged particles enter the atmosphere only near the magnetic poles.

• The magnetopause deflects charged particles away from Earth.

• Auroras are caused by volcanic activity near the equator.

How does the ionosphere affect radio communications?

• The ionosphere reflects radio waves to make them stronger.

• The ionosphere only enhances local radio communication.
• The ionosphere has no impact on radio signals.
• The ionosphere only affects satellite communications.