layers of the earth
What is the outer layer of the Earth?
crust
Did the Big Bang make a noise?
it was more akin to a robotic humming.
Oceanic crust is on average how thick?
6–7 km thick
How did Alfred Wegener try to prove that the continents of Africa and South America were once connected.
studied the stratigraphy of different rocks and mountain ranges
What is electromagnetic radiation
a form of energy that propagates as both electrical and magnetic waves traveling in packets of energy called photons
What are the different parts of the Earth?
the crust, the mantle, the outer core, and the inner core.
Could we ever see all the way back to the Big Bang?
we can't see (in "lookback time") earlier than that.
true or false there is more than one type of crust
true
How did the ancient people of Japan explain earthquakes?
The ancient Japanese legend of Namazu explained why earthquakes occur this way. Namazu was a giant catfish that lived under the surface of the Earth. It would shake violently and cause great destruction from time to time. Kashima, who is a Japanese god, was the only god that was strong enough to control Namazu.
What are radio waves
a type of electromagnetic radiation
How many layers are there in the Earth?
4
Did time run more slowly after the Big Bang due to gravity?
Time appeared to move 5 times more slowly in 1st billion years after Big Bang,
According to plate-tectonic theory where is new oceanic crust being formed?
mid-ocean ridges
What are 'tectonic plates
large slabs of rock that divide Earth's crust,
How are radio waves artificially produced
when electrons, which are negatively charged, move back and forth within an antenna
What is the depth of the inner core of the Earth?
6,400 to 5,180 kilometers (4,000 to 3,220 miles)
If the Universe expands from the Big Bang, why isn't there an empty sphere at the centre?
the universe is simply expanding at all points.
Where are melts most likely to be produced by the adiabatic rise of mantle?
divergent plate boundaries,
What happens at the boundaries between these plates
Movement
What are radio telescopes
detect and amplify radio waves from space
What materials make up the inner core?
iron (Fe) and nickel (Ni)
Are there alternatives to the Big Bang theory?
Steady State universe.
who made the theroy
alfred wagnor
What a ect has Continental Drift had on the shape of the earth's surface?
It has shaped the continent’s
Who proved the existence of radio waves
Heinrich Hertz