S8GU1L2 - Stars

S8GU1L2 - Stars

Lesson Vocabulary

Multiple Choice

The brightness of a star as seen from earth

• apparent magnitude

• luminosity

• absolute magnitude

• star

Multiple Choice

a measure of how bright a star would be if it were seen from a standard distance

• apparent magnitude

• luminosity

• absolute magnitude

• star

Open Ended

What do you know about our sun?

What do you know about the sun?

Answer:

• The sun emits light and energy and it is the center of the solar system.

• It is extremely hot and is made up mostly of gases.

• Plants use sunlight to make their own food during the process of photosynthesis. 

Open Ended

How is Earth different from the sun?

• The sun is a star made of gases. It is extremely hot and extremely large compared to the Earth. 

• Earth is a relatively small planet with a surface covered with soil, rocks, and water. Earth's atmosphere provides the gases that animals and plants need in order to survive. The sun's atmosphere is made up of extremely hot gases that would be deadly to any living things on Earth.

Open Ended

How does the sun support life on Earth?

• The sun provides the energy that warms Earth.

• The sun's light is used by plants to make their own food.

• Without the sun, life as we know it would cease. 

How do astronomers use solar radii as a unit of measurement?

• Astronomers use the radius of the sun as a "yardstick" or benchmark to measure the size of other stars.

• The size of a star is expressed in solar radii.

Open Ended

What could scientists learn from a probe sent to the sun?

• Scientists could learn about the sun's atmosphere and surface and the changes that take place there.

• They could learn about the sun's radiation and how it affects Earth.

• If the probe could be sent into the sun, scientists could learn about the properties of some of the sun's layers before the probe burned up.

What is the relationship between the star's apparent magnitude and its brightness in the sky?

• The lower the star's apparent magnitude number, the brighter the star appears.

• The higher the number, the dimmer the star appears.

Other than luminosity and distance, what could affect how a star appears in the night sky?

• A star's position next to a very bright star could make it appear dimmer than it is.

• 
  

End of Presentation

to be continued