地球的自转与公转
Earth's Spin & Orbit
理解地球以两种方式运动：它每24小时绕自身轴旋转（自转）一次，造成昼夜交替；它每365天绕太阳运行（公转）一周，即一年。
Understand that Earth moves in two ways: it rotates (spins) on its axis once every 24 hours causing day and night, and it orbits (travels around) the Sun once every 365 days, which is one year
学习证据 / Evidence
- 用地球仪或球演示地球自转使朝向太阳的一面是白天，背向太阳的一面是黑夜
- 说出地球完整自转一圈大约需要24小时（一天）
- 说出地球绕太阳完整公转一圈大约需要365天（一年）
- Demonstrate with a globe or ball that Earth's rotation causes day on the Sun-facing side and night on the opposite side
- State that one full rotation takes about 24 hours (one day)
- State that one full orbit around the Sun takes about 365 days (one year)
评估问题 / Assessment
{{name}}能解释我们之所以有白天和黑夜是因为地球自转，而一年是地球绕太阳一整圈所需的时间吗？
Can {{name}} explain that we have day and night because the Earth spins, and that a year is the time it takes Earth to go all the way around the Sun?