permafrost

«permafrost» in Mova's school dictionary: Ground that stays frozen all year round for at least two… — its meaning for a pupil, its sense in the lessons and examples.

part of speech

noun (permafrost — uncountable)

meaning for a pupil

Ground that stays frozen all year round for at least two years in a row, found in very cold places like the Arctic, Siberia, Alaska and northern Canada. tree →

sense in the lessons

In geography and climate lessons, melting permafrost shows global warming: buildings sink, roads crack, and gases trapped inside escape. Frozen mammoths have been found in permafrost. Phrases: thawing permafrost, permafrost layer.

examples

• In northern Canada, the ground under the moss is permafrost. tree →
• Scientists found a baby mammoth frozen in the permafrost. tree →
• Houses in Siberia are built on stilts above the permafrost. tree →
• As the climate warms, the permafrost is thawing. tree →
• Trees cannot grow deep roots in permafrost. tree →
• Thawing permafrost lets out greenhouse gases. tree →

note

Uncountable: some permafrost, not a permafrost. From permanent + frost. The top layer may thaw in summer while the ground below stays frozen.

Trees and pragmatics

Every meaning and example of «permafrost» parsed by Mova, each sentence with its dependency tree and frames.