11.1 - The Sun

Question 1

Approximately how much of the mass in the solar system is contained in the Sun?

Answer 1

99%

Question 2

This Sun is primarily composed of which TWO of the following elements?

Answer 2

Hydrogen & Helium

Question 3

What do we call the “cool” patches on the surface of the Sun?

Answer 3

sunspots

Question 4

When the Sun has more sun spots it is more active? T or F

Answer 4

true

Question 5

Which features of the Earth protect all life on the surface from the effects of the sun?

Answer 5

Ozone layer & Magnetic field

Question 6

What feature on the Sun’s surface emits large amounts of energized particles and radiation?

Answer 6

solar flares

Question 7

This carries high energy particles to the Earth and can potentially interfere with satellites and power grids.

Answer 7

Solar winds

Question 8

Which of the following are possible hazards associated with large quantities of solar wind and radiation?

Answer 8

Astronauts are exposed to more radiation than usual, putting them at risk for cancer & Sensitive equipment in satellites orbiting the Earth could be damaged & Power grids on Earth’s surface could be overloaded and damaged.

Question 9

Why might it be important to predict when the Sun is about to emit a solar flare in the Earth’s direction?

Answer 9

1. If solar flares are pointed in our direction there is an increase in radiation and solar wind travelling toward the Earth.
2. astronauts in the path of that radiation and solar wind can seek additional protection if they are given some warning.
3. sensitive equipment in satellites or other equipment in space that could be damaged by the energized particles in the solar wind
4. Steps could be taken to protect power grids on Earth from being overloaded by a burst of solar radiation and solar wind.

Question 10

how much mass does the sun have?

Answer 10

300 000 times more mass than Earth