Question

name:
gizmos h - r diagram exam:
period:
part 1: please write the number of correct questions from the gizmo (q. 1 to 5) right here. these are the 5 multiple choice questions directly under the gizmo launch window. remember, to do this quiz you must have your gizmo lab packet handy. # of correct answers:

1. consider for the moment the following colors - if these colors match the stars in our lab; please place them in order from coolest to hottest: a) yellow, b) blue, c) orange, d) red, e) white.
2. what two attributes of a star contribute most directly to its luminosity (brightness)?
3. consider the h - r diagram in the lab; name a star that qualifies as a red dwarf from this gizmo activity?
4. a star with a temperature of 7000 k, and a luminosity of 0.001 would fit within what classification group on the h - r diagram?
5. our sun is a main sequence star right now, but when it runs out of hydrogen fuel and begins to fuse helium it will move to which classification of stars on the h - r diagram?

bonus: the star \3y3 brn bryt3\ has a luminosity of 20,000 and a temperature of 3000 k. what would be its a) classification and b) color?

Explanation:

Step1: Recall star - color temperature relationship

Cooler stars are redder, hotter stars are bluer.

Step2: Order colors from coolest to hottest

The order is Red, Orange, Yellow, White, Blue.

Step3: Identify star - luminosity factors

The two main attributes contributing to a star's luminosity are its surface temperature and its radius. A larger radius and higher temperature mean more energy is radiated.

Step4: Know red - dwarf characteristics

A red - dwarf is a small, cool, low - mass star. Examples in the Gizmo could vary depending on the specific data in the Gizmo, but they are typically small and have low temperatures.

Step5: Use H - R diagram knowledge

A star with a temperature of 7000 K and a luminosity of 0.001 is a White Dwarf. White Dwarfs are hot but have low luminosities due to their small size.

Step6: Understand stellar evolution

When the Sun runs out of hydrogen fuel and starts fusing helium, it will become a Red Giant.

Step7: Analyze bonus star

A star with a luminosity of 20000 and a temperature of 3000 K is a Red Giant (classification) and has a red color.

Answer:

1. Red, Orange, Yellow, White, Blue
2. Surface temperature, Radius
3. (Depends on Gizmo data, but generally small, cool stars)
4. White Dwarf
5. Red Giant

Bonus: a) Red Giant, b) Red