Continents & Oceans
How many continents are there on Earth?
7
What landform is a mountain that erupts lava?
Volcano
Many islands are formed from _______ eruptions in the ocean?
Volcanic
When layers of sediment press together, they form ___________ rock.
The outermost layer of the Earth where landforms are is called the _________.
Crust
What landform has water on three sides?
Peninsula
Vents
When lava cools, it becomes ________ rock.
A. Sedimentary
B. Igneous
c. Metamorphic
Igneous
Mantle
True or False. All the oceans are connected.
True
Which landform is high flat land surrounded by lowland?
Plateau
True or False. Landforms have been the same since their creation.
False. Landforms are always changing because of tectonic plate movement and erosion.
Magma in the mantle of the Earth is made from molten (melted) _______ and ________.
The center of the Earth is called the ________ . It is largely made of Iron and is solid because of extreme pressure. It is 9000 degrees F!
inner core
Which Ocean is the largest and deepest?
Pacific Ocean covers 30% of the Earth's surface.
A glacier is a slow-moving ice mass made from _______.
Possible answers: snow, freshwater
Rivers flow from mountain top to the ocean or sea because of gravity.
1. Where does the water come from? 2. Is it salt water or fresh?
1. Rain or melted snow
2. Fresh
________ and pressure over time turn sedimentary rock into metamorphic rock.
Heat from the magma below
Which layer of the Earth makes up 84% of Earth's volume?
Mantle
What percent of the oxygen we3 breathe is from produced by the oceans?
A. 30%
B. 50%
C. 70%
C. 70%
Sink holes are formed when _______ gets into the crust and the soft sedimentary rock dissolves.
Name a place that has a lot of sink holes.
water, groundwater
possible answers: Florida, Mexico
Many of the biggest mountain ranges are fold mountains. Fold mountains are formed when ____________?
Tectonic plates collide and the layers of rock are pushed up.
Name a rock and its type.
Examples:
Igneous - basalt, obsidion, granite, pumice
Sedimentary - limestone, sandstone, shale
Metamorphic - quartz, marble, slate
The crust has two names: continental crust and oceanic crust. The thickness is anywhere from 5 to 25 miles. Which is thicker? Continental or Oceanic?
Continental