Earth's Layers
Plate Tectonics
Convection Currents
Plate Boundaries
Layers of Solid Earth
100
Which layer under the crust is solid and why?
The inner core is solid because of the high pressure and temperatures.
100
What is plate tectonics?
Theory that earth's outer core shell is divided into several plates that glide over the mantle.
100
What is a convection current?
A convection current is when heat is being transferred from one place to another by density of a fluid. For example like water, air or molten rock.
100
What are the three plate tectonic boundaries?
divergent,convergent, transform plate boundaries,
100
What is the crust made up of?
Rock
200
What is the earth's layers? Hint ( there are four separated layers that are in the earth)
crust, mantle,outer core, inner core
200
Why have the same fossils of land animals been found in South America and Africa?
The continents were once connected as a single land mass
200
How are convection currents made?
Convection currents are made by the heat of Earth's core.
200
The plate boundary with plates moving toward each other.
Convergent
200
What is the solid inner core made up of?
Iron and nickle
300
The layer of the Earth which is made up of a soft rock that bends like plastic.
mantle
300
Which type of boundary causes mountains to form?
Convergent boundaries
300
Free space
Every team gets 300
300
The plate boundary with plates moving away from each other?
Divergent
300
There are several areas throughout the world where tectonic plates push against each other. Which landform could form when two of these plates collide?
A mountain range
400
Which layer has convection currents that cause the movements of crustal plates?
The mantle
400
California has a lot of earthquakes because of the transform boundary it is on. What causes the earthquakes at transform boundaries?
The release of built up stress as the plates slide past each other
400
A scientist uses a computer model to investigate the heat flow in Earth's mantle.
What a benefit of using a computer model to simulate
interactions in Earth's layers?
The computer model allows scientists to predict the motion of tectonic plates.
400
Plate boundary with plates sliding past each other
Transform
400
Why is the inner core solid while the outer core is liquid?
There is more pressure on the inner core
500
What layers make up the lithosphere.
The rigid lithosphere is made up of the crust and upper mantle.
500
How are tectonic plates able to move?
Tectonic plates are able to move because the earth's lithosphere moves along the mantle like a conveyer belt due to the convection currents.
500
Geysers spray steam and hot water into the air. What causes geysers?
The flow of heat through a magma chamber underneath Earth’s crust.
500
The oldest rocks found on land are almost 3.8 billion years old. The oldest rocks found on the ocean floor are less than 200 million years old. Which of the following best explains why ocean rocks are younger than land rocks?
Sea floor spreading at divergent boundaries creates new crust and pushes older ocean crust into the mantle.
500
Colleen is attending a college in the Rocky Mountains and is majoring in geology.
She is researching how mountains have formed throughout Earth's history. Which investigation would be the best way for Colleen to explore how mountains are formed by the folding of layers in Earth's crust?
visiting an exposed mountainside observing of the rock layers