The Earth In The Universe P1 Flashcards
What is as the centre of our solar system?
The sun
What are asteroids?
Asteroids are irregular lumps of rock. In a circular orbit between Mars and Jupiter
What are comets?
Are small objects made of rock and ice, with very elongated orbits around the sun.
What are dwarf planets?
Small spherical orbits around the sun.
The sun is one of millions of stars in the….
Milky Way
What is real and relative brightness?
Two stars with have the same real brightness (appear as bright as each other) yet they can have different relative brightness the start which is further away has a smaller relative brightness.
What is the parallax effect?
As the Earth orbits the sun nearby stars me slightly against fixed background of distant stars this is called the parallax effect
When is nuclear fusion only possible?
Nuclear fusion is only possible when there are very high densities and temperatures.
What is red shift?
The increase of wavelength from a galaxy moving away is called red shift.
How did the universe start?
universe started with the big bang theory
Name some evidence for and against Alfred Wegner’s theory on continental drift?
For-The way that the continents fitted together so well and similar fossils and rocks the sound on continents now separated by oceans
Against-they already had other theories, nobody can explain the movement of continents and Wegner was not a geologist
What is the seafloor spreading?
The seafloor spreading between continents moving apart can increase the by a few centimetres each year.
What can be found where tectonic plates meets a plate boundary?
Earthquakes volcanoes and mountains are found.
What is the Structure of the Earth?
Inner core, outer core, mantle and crust.
Tell me about P-waves?
P-waves move quickly through solid crust and liquid core. They are primary waves and longitudinal.
