Astronomy › lesson 05 of 100 · Beginner

The Sun: Our Star

The Sun is a star that powers our solar system.

The Sun rises every morning and sets every evening, bringing light and warmth to our planet, and this is because it is a star at the center of our solar system.

A star is a massive ball of hot, glowing gas, and the Sun is the closest star to Earth.

The Sun's energy is essential for life on Earth, and it is what makes plants grow, evaporates water, and powers the climate and weather.

Without the Sun, our planet would be a cold and dark place, unable to support life as we know it.

示例

• The Sun's energy is used by plants to perform photosynthesisThis process is essential for plant growth and produces oxygen as a byproduct
• The Sun's heat evaporates water from the oceans, forming clouds and precipitationThis process is crucial for the Earth's water cycle
• The Sun's light and heat are essential for the formation of fossil fuelsFossil fuels are a major source of energy for human activities

完整课程用 5 道题核对每一课，随你的层级调整，并记住你的位置。