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WorksheetsY9 6.5 Tectonics [ReviSion]
Total questions: 28
Worksheet time: 24mins
convection current of magma
Which set of events is most common along tectonic plate boundaries?
Earthquakes and volcanoes
Erosion and earthquakes
Tidal waves and volcanoes
Hurricanes and tsunamis
tectonic plates
Convection currents happen in the mantle. The outer core heats magma around it and causes it to become less dense. Because the magma is less dense than the material around it, it starts to rise toward the crust. Since the crust is not hot, the magma starts to cool as it gets close to the crust. Since it is cooling, it gets denser and starts to sink back down toward the outer core.
Use the information above to answer the following question: Which of the following TWO things happen to magma causing it to rise?
It gets cooler.
It gets warmer.
It gets denser.
It gets less dense.
What is the thinnest and outer most layer of the Earth, that we live on?
Outer Core
Crust
Mantle
Inner core
Which layer of the Earth is solid iron and nickel?
Mantle
Crust
Inner Core
Outer core
Describe the most likely relationship between these mountains and nearby tectonic plates.
The mountains are probably formed by earthquakes
The mountains are probably formed by the movement of glaciers
The mountains are probably located near the edge of 2 tectonic plates.
The mountains are probably formed by running water.
What was the name given to all the continents when they were joined as one super continent?
Supreme Continent
Eurasia
Plate tectonics
Pangaea
Match the following images with vocabulary.
Continental Drift
Divergent Boundary
Transform Boundary
Convergent Boundary
Upon observation of the Mid-Atlantic ocean ridge, scientists discovered what evidence that supports continental drift?
The ridge was made of new material while the land around it was older material
The ridge was made of old material while the land around it was newer material
Magma was actively seen producing new material
Old magma was discovered in the land around it
Rocks on each plate rub up against each other and build up a lot of potential energy. Once this energy is great enough, the rocks will break and the energy will be released. This causes...
Volcanic eruptions
Earthquakes
Both volcanic eruptions and earthquakes
First an earthquake and then a volcanic eruption
Many natural events occur in the Pacific Ring of Fire. Based on your knowledge of tectonic plates, what events occur here?
Volcanic eruptions
Mountain ridges
Both volcanic eruptions and mountain ridges
First a volcanic eruption and then formation of mountain ridges
The movement of tectonic plates is due to ____?
convection currents in the mantle
seafloor spreading
What is true about the Earth's plates?
The are made of solid rock that can never be seen.
They are made of solid rock that can be seen if not covered by soil, rock, or water.
What is true about the Earth's plates?
They are separated by oceans.
They fit closely together with each plate touching all the others.
What happens when continental plates press together?
The edges of the plates will push upward and continue to move toward each other.
The edges of the plates will be pushed downward and continue to move toward each other.
Two of Earth's plates pressed together for millions of years. What happened?
The oceanic plate was pushed downward
The continental plate was pushed downward.
What kind of diagram would show how three of the Earth's plates fit together?
They would be next to each other and have a space between them.
They would be next to each other and have no space between them.
As plates pull apart, what happens?
Loose rock material fills the empty space.
New plate material fills the empty space so there is no space left.
What is true about the layer (lower mantle) below the Earth's plates?
It is solid rock.
It is slightly softened rock like clay.
The Mesosaurus was a fresh water reptile that existed on Earth about 250 million years ago. Fossils of the reptile can be found today in some rock layers in both Africa and South America as shown on the map below in locations X and Y.
Which reason best explains why fossils of this animal are found on both continents today?
The ocean between the two continents was once frozen, and the Mesosaurus traveled across the ice.
The continents of South America and Afrika were once joined together as a single land mass.
The Mesosaurus swam across the ocean due to its migration.
During a sea level rise and floods fossil remains of the Mesosaurus were carried across the oceans between the two continents.
