The Sun Answers

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Radio communications were severely disturbed last week, and the local newspaper says that solar activity is to blame. Which types of solar activity could the newspaper be talking about?

A
auroras and solar flares
B
solar flares and prominences
C
prominences and solar winds
D
solar winds and sunspots
2
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The distance between planets varies as they move in their orbits. The minimum distance from the Earth to Mars is about 0.35 AU. About how many kilometers is that?

A
15,000,000 km
B
25,000,000 km
C
55,000,000 km
D
70,000,000 km
3

The local newspaper has published the passage below.Last week, scientists released incredible images of aurora australis, known as the northern lights. The images show a beautiful display of lights. These lights are the result of the solar activity known as solar wind. The particles of the solar wind flow along the lines of Earth’s magnetic field and collide with gas atoms in Earth’s atmosphere. Light is given off as a result of these collisions. Traces of solar wind reach well beyond Earth and have been detected as far as Saturn.Which statement is inaccurate?

A
Solar wind particles flow along the lines of Earth’s magnetic field.
B
Light is given off when solar wind particles and gas atoms collide.
C
The aurora australis is known as the northern lights.
D
Solar winds reach well beyond our planet.
4

What are the dark areas on the surface of the Sun?

A
solar flares
B
sunspots
C
prominences
D
solar winds
5

In order to recreate the process of energy production that takes place in the Sun, scientists use

A
hydrogen gas and add heat and pressure.
B
helium gas and remove heat and pressure.
C
hydrogen gas, add heat, and remove pressure.
D
helium gas, remove heat, and add pressure.
6

Which elements are the main components of the Sun?

A
carbon and oxygen
B
nitrogen and hydrogen
C
hydrogen and helium
D
helium and neon
7

Malika is writing an essay about the Sun. Below is the first paragraph in the essay.The Sun is an average-size star that is located at the center of the solar system. This hot, glowing ball of gas has a diameter of 1,393,000 km. This means 109 Earths would fit side by side across the diameter of the Sun. At the surface, the Sun’s temperature is about 550 degrees Celsius. Earth is located just under 150 million kilometers from the Sun.Malika quickly realizes this paragraph contains an error. Which statement corrects the error?

A
The Sun is a large star, not an average-size star.
B
The Sun is not a glowing ball of gas—it is solid.
C
The Sun’s surface temperature is about 5,500 degrees Celsius.
D
Earth is located over 300 million kilometers from the Sun.

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