mặt trời lớp 7

How does Earth move through space?

• It orbits the Sun, which remains stationary in the center of the universe.

• It orbits the Sun, and the entire solar system moves through the Milky Way galaxy.

• It moves in a straight line through the Milky Way galaxy, while the Sun orbits it.

• It only rotates on its axis, while the Sun and galaxy are stationary.

What concept did Galileo Galilei explain regarding motion and observation?

• The Earth is the absolute center of the universe.

• All motion is relative, and there is no absolute reference point for motion.

• Objects in motion always come to a stop unless a force acts upon them.

• The speed of light is constant for all observers.

What are Milankovitch cycles primarily responsible for on Earth?

• The daily cycle of day and night.

• The formation of new galaxies.

• Long-term climate changes, including ice ages.

• The constant distance between Earth and the Sun.

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What is the approximate speed at which our Sun orbits the center of the Milky Way galaxy?

• 8 km/s

• 230 km/s

• 5 km/s

• 370 km/s

Besides orbiting the galactic center, what are the three additional complex movements the Sun undergoes simultaneously?

• Axial rotation, orbital precession, and tidal locking

• Radial movement towards the galactic center, tangential movement around the galactic core, and vertical oscillation perpendicular to the galactic plane

• Revolution around a binary star, expansion with the universe, and magnetic field fluctuations

• Gravitational lensing, dark matter interaction, and stellar wind variations