潮汐、波浪和洋流
Tides, Waves & Currents
知道海洋有潮汐（水位每天升降两次，主要由月球的引力引起）、波浪（由风引起）和洋流（像河流一样在海洋中流动，把热量和养分带到世界各地）。
Know that the ocean has tides (water level rises and falls twice a day, caused mainly by the Moon's gravity), waves (caused by wind), and currents (rivers of water flowing through the ocean that carry warmth and nutrients around the world)
学习证据 / Evidence
- 将潮汐描述为水位有规律地上升和下降，由月球的引力引起
- 解释波浪是由风吹过水面引起的
- 描述洋流是海洋中的大规模水流，把热量和养分带到全球各地
- Describe tides as the regular rise and fall of water level, caused by the Moon's gravity
- Explain that waves are caused by wind blowing across the water surface
- Describe ocean currents as large flows of water that carry heat and nutrients around the globe
评估问题 / Assessment
如果{{name}}注意到白天海滩的水位在变化，能解释潮汐是由月球的引力引起的，而且海洋中还有风引起的波浪，以及像水下河流一样流动、输送热量和养分的洋流吗？
If {{name}} noticed the water level changing at the beach during the day, could they explain that tides are caused by the Moon's pull, and that the ocean also has waves from wind and currents that flow like underwater rivers?