Land that supplies water to a river system.

• wetlands
• watershed
• estuary
• river system

Areas of higher elevations that separate watersheds.  Mountains and ridges are examples.

• wetlands
• estuary
• divides
• watershed

a river and ALL its tributaries

• ecosystem
• estuary
• watershed
• river system

Made up of the biotic community and the abiotic factors that affect it. 

• ecosystem
• water quality
• habitat
• watershed

Nonliving factors in an ecosystem

• biotic
• abiotic
• estuary

• wetlands

Living and once living factors in an ecosystem

• watershed
• ecosystem
• biotic
• abiotic

temperature, water, rocks, soil, geology, weather are all ___ factors in an ecosystem.

• abiotic
• biotic
• estuary
• wetlands

As water flow decreases, what happens to sediment?

• increases
• decreases and settles to the bottom
• stops
• floats

As water flow increases, what happens to sediment size?

• decreases and settles to the bottom
• stops
• floats
• increases

The smaller streams and rivers that feed into the larger river.

• tributaries
• estuary
• wetlands
• river system