⭐ Part 1: Star Life Cycle Knowledge

1. Circle the correct order of a star's life cycle for a medium-sized star like our Sun:

Nebula → Protostar → Main Sequence → Red Giant → White Dwarf

Protostar → Nebula → Red Giant → Main Sequence → White Dwarf

Main Sequence → Nebula → Protostar → Red Giant → Supernova

Nebula → Main Sequence → Protostar → White Dwarf → Red Giant

2. What process occurs in the core of a main sequence star?

Nuclear fission

Nuclear fusion

Chemical combustion

Gravitational collapse

3. Which factors determine a star's final fate? (Check all that apply)

Initial mass of the star

Temperature of surrounding space

Amount of fuel available

Distance from Earth

Age of the universe

🌌 Part 2: Star Formation and Elements

4. Fill in the blanks about star formation:

Stars begin their lives in regions called _____________, which are vast clouds of _______ and dust. When gravity causes these materials to collapse, they form a _____________, which eventually becomes hot enough for nuclear _______ to begin, creating a main sequence star.

5. Match each star life stage with the elements it primarily produces:

1. Main Sequence Star

2. Red Giant/Supergiant

3. Supernova Explosion

4. Stellar Nucleosynthesis

A. Elements heavier than iron

B. Helium from hydrogen fusion

C. Carbon, oxygen, and silicon

D. All elements up to iron

6. Explain why massive stars have shorter lifespans than smaller stars:

🎨 Part 3: Create Your Star Life Cycle Diagram

7. In the space below, draw and label a complete star life cycle diagram. Include:

Requirements:

All major stages from nebula to end state
Arrows showing the progression
Labels for each stage
Two different pathways (small vs. massive stars)
At least 5 elements produced during the cycle

8. Write a brief explanation of your diagram:

🔬 Part 4: Stellar End States

9. What determines whether a massive star becomes a neutron star or a black hole?

The star's original colour

The star's final mass after the supernova

The star's distance from other stars

The star's rotational speed

10. Complete the table by filling in the missing information:

Star Type	End State	Example
Low to medium mass (like our Sun)	_____________	Sirius B
High mass (8-25 solar masses)	_____________	_____________
Very high mass (>25 solar masses)	Black Hole	_____________