Soil and Vegeation

_______ is a thin layer of weathered rock, organic humus, air, and

water. It shapes human existence in many ways.

• Soil

• ecosystem

• biome

• savanna

An ____________________ is an interdependent community of plants and animals.

• biome

• ecosystem

• deciduous

• savanna

___________________ can be further

divided into forest, grassland, desert, and tundra.

• Forests

• ecosystem

• savanna

• biome

_______ regions are categorized by the trees they support—

broadleaf or needleleaf.

• Steppe

• rain

• Forest

• biome

Broadleaf trees, such as maple, oak, birch, and cottonwood, are also called

____________________ trees.

• coniferous

• Deciduous

• forest

• none

____________________ trees, are found in huge

stands in northern regions of the United States and Canada, Asia, and Europe.

• needle

• savanna

• deciduous

• all of the above

_________mostly flat regions dotted with a few trees, are called different terms.

• Rainforests

• biome

• tundra

• grasslands

The term ____________________ or prairie is used for the

temperate grassland region.

• Steppe

• savanna

• rain forest

• none of the above

In the Tundra region, plants that hug the ground, such as _____

and _______, are best adapted to survive the cold.

• mosses

• lichens

• both mosses and lichens

• deciduous trees and coniferous

In the desert, plants that can conserve water and withstand heat are

• cacti

• shrubs

• sagebrush

• all of the above