北极苔原

了解北极苔原是什么：一片广阔无树的土地，地表之下是永久冻土（常年冻结的地面），夏季生长季非常短暂，苔藓、地衣和坚韧的草类会蓬勃生长；这里是北美驯鹿/驯鹿、麝牛、旅鼠和雪鸮的家园。

Know what the Arctic tundra is — a vast, treeless landscape with permafrost (permanently frozen ground) just below the surface, a very short growing season in summer when mosses, lichens, and tough grasses burst into life, and home to caribou/reindeer, musk oxen, lemmings, and snowy owls

学习证据 / Evidence

• 将苔原描述为没有树木、地表下有永久冻土（常年冻结的地面）的景观
• 解释苔原的夏季生长季非常短暂，苔藓、地衣和草类在此期间迅速生长
• 说出至少三种苔原动物：北美驯鹿/驯鹿、麝牛、旅鼠或雪鸮

• Describe the tundra as a treeless landscape with permafrost (permanently frozen ground) beneath the surface
• Explain that the tundra has a very short summer growing season when mosses, lichens, and grasses grow quickly
• Name at least three tundra animals: caribou/reindeer, musk oxen, lemmings, or snowy owls

评估问题 / Assessment

{{name}}知道苔原是什么吗——北极附近那片广阔平坦、没有树木、地下有冻土、夏季短暂而万物蓬勃生长的土地？

Does {{name}} know what tundra is — the huge flat landscape near the Arctic with no trees, frozen ground underneath, and short summers where everything bursts into life?