Question

1. choose the best answer.

what carries particles from the sun to earth and to the very edges of the solar system?
rotation
solar wind
the photosphere
the corona

1. choose the best answer.

stars are classified by color, magnitude, and ______.
size
shape
elements
rotation speed

Explanation:

Question 18

To solve this, we analyze each option:

• Rotation: Refers to the sun's or a planet's spinning, not particle transport.
• Solar Wind: A stream of charged particles (plasma) emitted from the sun's corona, carrying particles throughout the solar system.
• Photosphere: The sun's visible surface, not a particle - carrying mechanism.
• Corona: The sun's outer atmosphere, not what carries particles.

So the correct answer is the option related to solar wind.

We evaluate each option for star classification:

• Size: Stars are classified by color (related to temperature), magnitude (brightness), and size (e.g., dwarf, giant, supergiant).
• Shape: Stars are generally spherical, so shape isn't a main classification factor.
• Elements: While stars are made of elements, it's not a standard classification criterion with color and magnitude.
• Rotation Speed: Not a primary classification factor with color and magnitude.

So the correct answer is the option related to size.

Answer:

B. solar wind (assuming the second option is labeled B; if the original labels were different, adjust accordingly. Based on the order, the second option is "solar wind")

Question 19