review for test 3 Flashcards Preview

Juliana's Science test December 2017 > review for test 3 > Flashcards

Flashcards in review for test 3 Deck (39):
1

Landform

A natural land shape or feature

2

Topography

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.

3

What is a glacier?

A glacier is a large thick sheet of ice. As glaciers move, they change the land around and beneath them.

4

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.

5

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!

6

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.
- Ice
- Plants
- make sure to go over homework question regarding the colca-cola bottle in the freezer

7

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)

8

Mantle

(Upper and lower-soiid rock-some mantle rock is soft)

9

outer core

(hot outer core is liquid iron)

10

Crust

(surface layer)

11

inner core

iron and nickel. Even though very hot great pressure at the center of earth keeps inner core solid)

12

Earth's crust and uppermost mantle are divided into sections called

Plates

13

Plates

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.

14

Earthquake

when two of the earth's plates move suddenly past each other, energy is released and the ground shakes

15

An earthquake is

movement of the ground caused by a sudden release of energy in earth's crust

16

The place where energy is released is called the?

Focus

17

The greatest damages most likely take place

directly above the focus

18

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.

19

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)

20

plates pushing together

Usually very strong

21

plates sliding past each other

usually very strong)

22

plates pulling apart

very weak

23

Scientists classify earthquakes by estimating their...?

magnitude

24

magnitude is?

amount of energy released

25

What is used to measure Earthquakes?

Richter scale

26

An earthquake measuring 2.0 is...?

too small to be felt

27

6.0 and higher

can cause a great deal of damage!

28

Remember 6.0 is NOT 3 times stronger than 2.0, it is...?

more than 1,000,000 times stronger!

29

An increase of 1 on the richter scale is an increase in strength of about...?

32 times

30

Most earthquakes occur along...?

a fault (or break in the earth's crust)

31

Faults develop as plate movements...?

bend and crack the crust

32

What causes an earthquake?

A sudden release of energy in the Earth's crust

33

mountains made of lava ash and other materials from eruptions.are called?

Volcanoes

34

melted or molten rock beneath Earth's surface, travels upward

Magma

35

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)

36

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)

37

Composite Volcanoes

wide with faily steep slopes (ex Mt St Helens, Washington State

38

Shield volcanoes

Broad volcanoes with gentle slopes (ex Hawaii)

39

cinder cone volcanoes

tall and narrow with steep slopes (Ex Paricutin, Mexico)