As the age of star increases

Options

A. Helium quantity increases
B. Helium quantity decreases
C. Helium quantity doesn.t change
D. Helium, Hydrogen both quantities increases

Answer

To answer the question "As the age of a star increases, what happens?", we can break it down into a step-by-step solution:

### Step 1: Understanding the Composition of Stars
Stars are primarily composed of hydrogen and helium. In the case of our sun, hydrogen is the most abundant element.

**Hint:** Remember that the primary elements in stars are hydrogen and helium.

### Step 2: Nuclear Fusion Process
In stars, nuclear fusion occurs, which is the process where hydrogen nuclei combine to form helium nuclei. This process releases a significant amount of energy, which is what powers the star.

**Hint:** Focus on the process of nuclear fusion and its role in energy production in stars.

### Step 3: Age of the Star and Hydrogen Consumption
As a star ages, it consumes hydrogen in its core through nuclear fusion. Over time, the amount of hydrogen decreases as it is converted into helium.

**Hint:** Consider how the consumption of hydrogen affects the star's composition over time.

### Step 4: Increase in Helium Concentration
As hydrogen is converted into helium, the concentration of helium in the star's core increases. This means that as the star ages, the amount of helium present becomes greater.

**Hint:** Think about the relationship between the burning of hydrogen and the formation of helium.

### Step 5: Conclusion
Thus, as the age of a star increases, the quantity of helium increases due to the continuous nuclear fusion of hydrogen into helium.

**Final Answer:** The quantity of helium increases as the age of the star increases.