Chapter 1 - Lesson 2 Streams and Rivers, Lakes - PowerPoint PPT Presentation

View by Category
About This Presentation

Chapter 1 - Lesson 2 Streams and Rivers, Lakes


Chapter 1 - Lesson 2 Streams and Rivers, Lakes Chapter 1 The Earth s Bodies of Water Water covers more than 70% of the Earth Water is in the ground and in the air ... – PowerPoint PPT presentation

Number of Views:105
Avg rating:3.0/5.0
Slides: 19
Provided by: Burg166


Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: Chapter 1 - Lesson 2 Streams and Rivers, Lakes

Chapter 1 - Lesson 2 Streams and Rivers, Lakes
  • Chapter 1
  • The Earths Bodies of Water

Streams and Rivers page 26
  • Water covers more than 70 of the Earth
  • Water is in the ground and in the air we breathe
  • People, Plants, and Animals all need water to

Weathering - is the process of breaking up rocks
into smaller pieces called sediment
Streams and Rivers
  • Streams are bodies of water that flow over land
    in a channel
  • Most streams begin on high ground, among hills or
  • The sources of a stream usually consist of
    melting snow/ice or an overflowing lake
  • At the end of a stream is the mouth which empties
    into another body of water

Streams and Rivers
  • Streams can be as small as a shallow brook
  • Or as large as a river, the largest and most
    important streams
  • Most rivers form from many smaller streams coming
    together, these are called tributaries

Tributaries are streams or rivers that flow
into a larger stream or river
Streams and Rivers
  • The more tributaries that empty into a river the
    larger the river grows
  • Together the river and its tributaries are called
    a river system

River System a river and all of its tributaries
Streams and Rivers
  • Each continent, except Antarctica, has major
    rivers and river systems.
  • Africa has the Nile, Asia has the Yangtze,
    Australia has the Murray, Europe has the Danube,
    North America has the Mississippi, and South
    America has the Amazon

Streams and Rivers, Lakes
  • The Nile is the Earths longest river, it flows
    from Central Africa to the Mediterranean Sea
  • The Amazon is the Earths largest river, carrying
    more water than the Mississippi, Nile and Yangtze
  • River Systems carry or drain water away from the
    land around them (drainage basin)
  • Rivers are important for many reasons including
    drinking, cleaning, travel and trade

Drainage Basin Land drained by a river system
Streams and Rivers
Drainage Basin
  • Why did many of the worlds first settlements
    form along rivers?
  • (pg.27)

  • Lakes are bodies of water surrounded by land
  • The word lake comes from the Greek language
    meaning hole because most lakes are holes in the
    Earth that fill with water
  • Lakes exist on every continent except Antartica
  • The greatest amount of lakes exist where there
    was once many glaciers such as North America and
    northern Europe

  • During the last Ice Age, glaciers gouged huge
    holes in the Earth and the holes filled with the
    water from the melted glaciers
  • Lakes also form where rainwater collects in huge
    holes made in other ways
  • Crater Lake in Oregon was formed in a crater of
    an extinct volcano

  • Lake Baikal in Russia is the deepest lake on
    Earth measuring 5,315 feet deep it was formed in
    a huge crack in the Earths crust called a rift

Rift a long and deep crack in the Earth
  • North America has the most lakes out of all of
    the continents
  • The largest of the North American lakes are the
    Great Lakes
  • One fifth of all of the fresh water on the
    Earths surface is found in the Great Lakes

H Huron O Ontario M Michigan E Erie S
  • There are some large bodies of water called seas
    that are actually lakes
  • The difference is that they are not fresh water,
    but salt water and that is why they are called
    seas instead of lakes
  • The Dead Sea, Sea of Galilee, and the Caspian Sea
    are lakes
  • The lowest lying lake is the Dead Sea between
    Israel and Jordan
  • The highest lake is Lake Titicaca in South America

The Dead Sea
Lake Titicaca
  • Not all lakes are made by nature
  • Some are man-made and are called resevoirs
  • People build dams to control river flooding or to
    generate electricity

Reservoir a lake that forms behind a human made
Terms to Know
  • Reservoir
  • Rift
  • Drainage basin
  • River system
  • Tributaries
  • How did Ice Age glaciers form lakes in North
    America and Europe? (pg. 28)