Hazardous Earth Flashcards
What are the 4 major layers of the earth’s structure?
Crust,Mantle,Outer core,Inner core
Which layer is the thickest?
The mantle
Which 2 layers are entirely solid?
The crust and the inner core
What are the 2 types of crust?
Oceanic and continential crust
Which 2 types of the crusts is more dense?
Why is this significant?
Oceanic crust is denser than continental crust primarily due to differences in composition and age.
What is the name of the process that causes the earth’s tectonic plates to move?
Convection currents
What is the name given for a cooling period in earth’s history?
glacial period
Where does the Earth’s recieve all of its heat energy from?
the sun
Why is the equator the hottest part of the Earth?
Because the centre of earth bulge out and is the first part of the earth that gets touched by the sun’s rays
Describe the climate at the equator
Hot and wet all year around
What are the four causes of climate change?
Greenhouse gases
Carbon dioxide
Burning of fossil fuels
Cutting down trees
What is the greenhouse effect?
The trapping of the sun’s warmth in a planet’s lower atmosphere, due to the greater transparency of the atmosphere to visible radiation from the sun
Give an example of a greenhouse gas
carbon dioxide , carbon monoxide , methane
What do you call the hot period in Earth’s history?
Inter-glacial period
