海洋里也有像河一样的“河”吗？
Are there rivers inside the ocean?
有。不同温度、盐度的水团密度不同，会在深海形成流动清晰的“密度流”，像海底的河一样搬运水体和营养。
Yes. Water masses of different temperature and salinity form distinct density currents in the deep sea, like underwater rivers moving water and nutrients.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-11-03
来源 · Source
加里森《海洋学》，Cengage，2015
Garrison, T., Oceanography: An Invitation to Marine Science, Cengage, 2015
独立核验依据 · Independent verification: 核验依据 1 OPENLIBRARY 标识 /works/OL25631913W：Oceanography an Invita
#密度流 #洋流
大海为什么一天会涨落两次潮？
Why do oceans rise and fall twice a day?
月球引力把正对和背对它的海水微微抬起，地球自转让各地每天经过这两处“鼓包”，所以一天通常两涨两落。
The Moon's gravity bulges the ocean on the near and far sides; Earth's spin carries each place through both bulges, giving two tides daily.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-11-03
来源 · Source
加里森《海洋学》，Cengage，2015
Garrison, T., Oceanography: An Invitation to Marine Science, Cengage, 2015
独立核验依据 · Independent verification: 核验依据 1 OPENLIBRARY 标识 /works/OL25631913W：Oceanography an Invita
#潮汐 #月球引力
海水为什么是咸的？
Why is seawater salty?
雨水冲刷陆地，把岩石里的盐分带进河流，最终汇入大海；水会蒸发变淡，盐却留下来越积越多，海就咸了。
Rain washes salts from rocks into rivers and then the sea; water evaporates but salt stays and builds up, making the ocean salty.
难度 入门 · 适合 幼儿(3-6)
CC BY 4.0 · 已核验 · Verified 2026-11-03
来源 · Source
加里森《海洋学》，Cengage，2015
Garrison, T., Oceanography: An Invitation to Marine Science, Cengage, 2015
独立核验依据 · Independent verification: 核验依据 1 OPENLIBRARY 标识 /works/OL25631913W：Oceanography an Invita
#海水 #盐度