E Short answer type questions.
1. What is a planet? Name any four planets of the solar system.
2. What causes day and night?
3. Name the planets of our solar system that have more than sixty moons.
4. What is a solar year?
F. Long answer type questions.
1. Distinguish between stars and planets.
2. Life exists only on the earth and not on other planets. Explain.
3. Describe the structure of the earth's crust.
4. What causes changes in the seasons?
5. Why is the season in the northern hemisphere always different from that
in the southern hemisphere?
HOTS (Higher Order Thinking Skills)
C1
Answers
Answer:
1.A very large round object in space that moves around the sun or another star.
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
2.The Earth orbits the sun once every 365 days and rotates about its axis once every 24 hours. Day and night are due to the Earth rotating on its axis, not its orbiting around the sun. The term 'one day' is determined by the time the Earth takes to rotate once on its axis and includes both day time and night time.
3.The Moons of Jupiter
With a whopping sixty-seven moons, Jupiter has the most orbiting satellites within the solar system. We can see the four Galilean moons from Earth with binoculars or a telescope.
4.The time it takes the earth to go around the sun once, approximately 365 ¼ days.
5.The seasons in the Northern Hemisphere are the opposite of those in the Southern Hemisphere. Seasons occur because Earth is tilted on its axis relative to the orbital plane, the invisible, flat disc where most objects in the solar system orbit the sun.