Question

What do the rivers deposits as they enter the plains?

Answer 1

silt which they bring with them

Answer 2

Rainfall can affect:

The speed of flowing water

As more water enters a river or stream:

It's water level rises, and it's speed increases

What is a Bank?

The rising ground that borders a river or stream

What is a Flood Plain?

Flat area of land on both sides of the river

A flood plain forms from:

Layers of sediment: silt, sand, and gravel-left behind each time the river overflows its banks

Because the sediment is rich in nutrients:

It makes good farmland

Flowing water is a powerful force that:

Changes the shape of Earth's surface

Faster moving water can carry:

Bigger and denser particles of rocks

Most large particles:

Roll, slide, or bounce along the bottom of a river or stream

Smaller particles:

Swirl in the water or are dissolved in it

The bits and pieces carried by moving water:

Act like tiny drills. They slam into rocks and chip away at them

The bits and pieces carried by moving water also:

Carve out or cut into the riverbed, or bottom of the river

This scratching and scraping, or abrasion, is greater in:

A fast-moving river than in a slow-moving one

What can cause a river or stream to slow down?

An obstacle such as a large rock or tree trunk

A steep river might:

Flow onto a flood plain

A river or stream might flow into:

A large body of standing water such as a pond, lake, or an ocean

Whenever water slows down:

It drops some of the particles it has been carrying

These particles, or sediment, are deposited and form:

Mounds or layers on the riverbed or the floor of a pond, a lake, or an ocean

V-shaped channels have steep:

Sides

Narrow streams are:

Swift-moving

Wide streams are:

Slow-moving

A stream's stage depends on:

The slope of the ground over which it flows

All streams go through 3 main stages:

Young (upper), mature (middle), and old (lower)

A young stream moves:

Swiftly down steep slopes

A young stream may have:

White-water Rapids and waterfalls

On nearly level ground the stream:

Matures and flows smoothly through its valley

Streams in the mature stage develop broad curves called:

Meanders

The flat valley floor formed by a meandering stream or river is the:

Flood plain

When a stream or river floods, it:

Covers all or part of the flood plain

An old stream flows:

Slowly through a broad, flat plain

Near its mouth the stream or river begins to:

Deposit its load of sediment

The unloading of sediment forms a:

Delta; an area of flat, fertile land that extends into an ocean or other large body of water

As rain and melting snow run downhill, they carry:

Water and sediment that eventually end up n a river, marsh, lake, or ocean

A watershed is:

The area from which water is drained, or the region that contributes water to a river or a river system

Each stream, lake, or pond has its own:

Watershed

Each smaller watershed drains into:

A larger watershed

In a watershed the flow of water and the resulting erosion and deposition vary with the:

Seasons

In many places, less rain falls in the:

Dry months of summer

Heavy rainfalls can result in greater:

Weathering, erosion, and deposition in a shorter period of time

What is an arroyo?

A small, water-carved channel with steep banks located in a dry area