Earth's Layers
What are the four main layers of the Earth?
What are the crust, mantle, outer core, and inner core?
What two elements make up most of the inner and outer core?
What are iron and nickel?
True or False: Temperature increases as you go deeper into Earth.
True
Which layer generates Earth's magnetic field.
What is the core?
What is Earth's Age?
4.54 billion years
Which layer of Earth is the outermost solid shell?
What is the crust?
Which state of matter(s) are the rocks that make up the mantle?
Both Solid and Liquid
Approximately how hot can the inner core get?
5000-6000 degrees Celsius (9,000 degrees Fahrenheit)
What layer lies directly below the Earth’s crust?
What is the mantle?
Earth's rotation is ________________ (Slowing Down/Speeding Up) very gradually.
Slowing down! About 17 milliseconds per century. Meaning, days were shorter in the past.
This layer is liquid and lies between the mantle and inner core.
Outer Core
What type of rock primarily composes the oceanic crust?
Basalt
The crust has the lowest amount of this physical characteristic compared to other layers.
What is pressure?
What is the name of the molten rock found in the mantle?
What is magma?
How much gold is believed to be in Earth's oceans? _________ million tons
20
Which layer makes up the largest volume of Earth?
What is the mantle?
What type of rock mainly composes the continental crust?
What is granite?
Name the process that drives the movement of the mantle.
What are convection currents?
Why do scientists believe Earth has different layers?
Different densities
Most of Earth's volcanic activity happens __________________.
Underwater
This layer is composed mostly of iron and nickel and is under immense pressure.
What is the Inner Core?
Which element is the most abundant in the Earth's crust?
What is oxygen?
What causes the outer core to be in a liquid state despite high pressure?
What is extreme heat?
The temperature at the Earth's core is comparable to the surface of what astronomical object?
What is the sun?
What is the largest living structure?
The Great Barrier Reef in Australia