Earths Surface
How are physical landforms developed?
Constructive forces cause physical features on Earth’s surface known as landforms to grow.
What does igneous rock from?
Magma
What is a topographic map?
Shows hills, valleys, streams, slopes etc.
Are there mountain ranges, rifts and trenches in the Seafloor?
True
What are Volcanic forces called?
Destructive forces.
What is the texture of a rock formed from?
How the magma cools.
Who was Alfred Wegener?
Born in the 1880 was a meteorologist that discovered drifts.
What is the name of the 4 billion old crust?
Continental Crust
How young are ocean basins?
Younger than 180 million years.
What is rhyolite, how does it form?
Rock that cools rapidly.
What did Wegener find evidence of?
That all continents were joined at one time.
Can seafloors switch magnetic polarity?
Yes
What is the mountain range called in the ocean?
mid-ocean ridge
What is an example of a rock cooled slowly?
Granite
What did Wegener call earth 300 million years ago?
Supercontinent.
What was a glass top guyot?
Was an erupting volcano in the sea.
Does Earths surface constantly change?
Earth’s surface changes over short and long periods of time.
What is sedimentary rock?
Made from sediments
What direction does the earths magnetic field surround?
From pole to pole
How can you tell the age of the seafloor?
The distance from the crest.