Flashcards in review for test 3 Deck (39):
A natural land shape or feature
All the kinds of landforms in a certain area. Topos in Greek means place, and grapho in Greek means to write. So topography means to write abut or describe a place.
What is a glacier?
A glacier is a large thick sheet of ice. As glaciers move, they change the land around and beneath them.
What is a sand dune?
A sand dune is a sand hill that is made and shaped by wind. As wind blows over a dune, the sand moves. This can change the dune's shape or even more the whole dune.
What is a delta
Is an area of new land at the mouth of a river. The greek letter D is called elta and capital D in Greek is shaped like a triangle. River deltas were named for this letter because of their shape!
Factors that change the Earth's landforms. ( Know at least 3)
- Changes caused by wind
- Changes caused by moving water
- Erosion and deposition.
- Sinkholes and landslides.
- make sure to go over homework question regarding the colca-cola bottle in the freezer
Earths Structure- four layers
Crust (surface layer)
Mantle (Upper and lower-soiid rock-some mantle rock is soft)
outer core (hot outer core is liquid iron)
inner core (iron and nickel. Even though very hot great pressure at the center of earth keeps inner core solid)
(Upper and lower-soiid rock-some mantle rock is soft)
(hot outer core is liquid iron)
iron and nickel. Even though very hot great pressure at the center of earth keeps inner core solid)
Earth's crust and uppermost mantle are divided into sections called
are block of crust and upper mantle tat fit together like puzzle pieces. Plates move because they fit together so closely, the movement of one plate affects other plates. Plate movements cause many changes in Earth's surface.
when two of the earth's plates move suddenly past each other, energy is released and the ground shakes
An earthquake is
movement of the ground caused by a sudden release of energy in earth's crust
The place where energy is released is called the?
The greatest damages most likely take place
directly above the focus
The point on earth's surface (directly above the focus) is called the?
Epicenter. Epi is the Greek word for upon, so epicenter means: upon the center.
Earthquakes are caused by 3 different types of plate movement
- plates pushing together( Usually very strong)
- plates sliding past each other (usually very strong)
- plates pulling apart (very weak)
plates pushing together
Usually very strong
plates sliding past each other
usually very strong)
plates pulling apart
Scientists classify earthquakes by estimating their...?
amount of energy released
What is used to measure Earthquakes?
An earthquake measuring 2.0 is...?
too small to be felt
6.0 and higher
can cause a great deal of damage!
Remember 6.0 is NOT 3 times stronger than 2.0, it is...?
more than 1,000,000 times stronger!
An increase of 1 on the richter scale is an increase in strength of about...?
Most earthquakes occur along...?
a fault (or break in the earth's crust)
Faults develop as plate movements...?
bend and crack the crust
What causes an earthquake?
A sudden release of energy in the Earth's crust
mountains made of lava ash and other materials from eruptions.are called?
melted or molten rock beneath Earth's surface, travels upward
When magma reaches opening or vent in the crust and then flows out of the vent. It is then called
lava (molten rock that reaches the earth's surface)
3 main types of Volcanoes
- Composite Volcanoes: wide with faily steep slopes (ex Mt St Helens, Washington State
- Shield volcanoes: Broad volcanoes with gentle slopes (ex Hawaii)
- cinder cone volcanoes; tall and narrow with steep slopes (Ex Paricutin, Mexico)
wide with faily steep slopes (ex Mt St Helens, Washington State
Broad volcanoes with gentle slopes (ex Hawaii)