Earth, Moon, and the Sun
Short Questions
1. What causes day and night on Earth?
Answer: Earth’s rotation on its axis.
2.In which direction does the Earth rotate?
Answer: From West to East.
3.How long does Earth take to complete one rotation?
Answer: About 24 hours.
4.What is the path of Earth around the Sun called?
Answer: Orbit.
5. How long does Earth take to revolve around the Sun?
Answer: About 365 days and 6 hours.
6.What causes seasons on Earth?
Answer: The tilt of Earth’s axis.
7.What is a solar eclipse?
Answer: When the Moon blocks the Sun’s light.
8.What is a lunar eclipse?
Answer: When Earth blocks sunlight from the Moon.
9.Why does the Sun appear to move across the sky?
Answer: Because Earth rotates.
10.What is the summer solstice?
Answer: The longest day in the Northern Hemisphere, around June 21.
Long Questions
1. Why do we see different stars in the night sky during different months?
Answer: Earth revolves around the Sun, so we face different parts of the sky at different times. This changes the stars we see each month.
2.How does the tilt of Earth’s axis cause seasons?
Answer: The tilt makes sunlight hit different parts of Earth more directly at different times. This changes how warm or cold it is, causing seasons.
3. Why can the Moon block the Sun during a solar eclipse even though it is smaller?
Answer: The Moon is closer to Earth, so it looks as big as the Sun in the sky. This lets it cover the Sun completely during an eclipse.
4. Why is it safe to look at a lunar eclipse but not a solar eclipse?
Answer: A lunar eclipse is just the Moon in Earth’s shadow, which is safe to see. A solar eclipse involves the Sun’s bright light, which can harm eyes.
5. How does Earth’s rotation affect the way stars appear to move in the sky?
Answer: Earth’s rotation makes stars seem to move from east to west. They appear to circle around the Pole Star, which stays nearly still.
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