Forests

Question 1

Forests

Answer 1

cover about one-third of Earth’s land surface, mostly in North America, the Russian Federation, and South America, and account for 75% of gross primary productivity and plant biomass.

Question 2

Ecozones

Answer 2

like boreal forests near the poles and tropical forests near the equator are formed by forests at different latitudes and elevations.

Question 3

Closed canopy
Forest layer

Answer 3

Tree crowns cover more than 20% of the ground’s surface.

The majority (80%) of the forest biome.

Question 4

Open canopy
Forest layer

Answer 4

Tree crowns cover less than 20% of the ground surface.