Question

1. why do distant stars appear dimmer than the sun? * 10 points

a. they are smaller in size.
b. they give off less light.
c. their light spreads out as it travels
d. they are covered by clouds.

1. the example of the flashlights in the story helps readers understand- * 10 points

a. why stars twinkle
b. how distance affects brightness
c. why stars move at night
d. how stars are made

1. which statement best supports the main idea? * 10 points

a. the sun gives off light that helps plants grow.
b. the stars at night are made of the same materials as the sun.
c. the sun looks brighter than other stars because it is much closer to earth.
d. the sun changes color as it moves across the sky.

Explanation:

• Question 4:
• The inverse - square law of light states that the intensity of light decreases with the square of the distance. As distant stars' light travels a long way, it spreads out.
• Option A: Some distant stars may be larger than the Sun.
• Option B: Many distant stars give off more light than the Sun.
• Option D: Clouds do not cover distant stars.
• Question 5:
• A flashlight's brightness decreases as the distance from it increases. Similarly, the brightness of stars (including the Sun) is affected by distance.
• Option A: Flashlights do not explain why stars twinkle (which is due to atmospheric refraction).
• Option C: Flashlights have no relation to why stars move at night (which is due to Earth's rotation).
• Option D: Flashlights do not explain how stars are made.
• Question 6:
• The main idea is likely about the brightness of stars and the Sun. The Sun is brighter because of its proximity.
• Option A: Talks about the Sun's role in plant growth, not brightness.
• Option B: Material composition does not directly support the main idea about brightness.
• Option D: Color change of the Sun is not relevant to the main idea about brightness.

Answer:

1. C. Their light spreads out as it travels
2. B. how distance affects brightness
3. C. The Sun looks brighter than other stars because it is much closer to Earth.