Evaluation
A. Answer the following questions.
1. Explain sunrise and sunset.
2. Explain how day and night occur.
3. Name the two important movements of the Earth.
4. Why do we have different seasons?
5. Define the term 'orbit:
Answers
Answer:
as the earth move around the sun it rotate on its exis so we have day and night the side of the earth facing the sun is bathed in light
Answer:
1. The sun stays in its position at the center of our solar system. It doesn't rise and set. But it appears to rise and set because of the Earth's rotation on its axis. It makes one complete turn every 24 hours. It turns toward the east.
As the Earth rotates, different locations on Earth pass through the sun's light. The animation shows how that looks hour by hour (for 4 hours). As your town turns toward the sun and begins to enter its light, the sun seems to rise in the east. As your town begins to leave the sun's light and enter darkness, it appears to set in the west.
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.
3. Rotation and Revolution
4.Earth has seasons because our planet's axis of rotation is tilted at an angle of 23.5 degrees relative to our orbital plane – the plane of Earth's orbit around the sun. The tilt in the axis of the Earth is called its obliquity by scientists.
5.An orbit is a regular, repeating path that one object in space takes around another one. An object in an orbit is called a satellite. A satellite can be natural, like Earth or the moon. Many planets have moons that orbit them.