The earth and Tectonic plate stage 7

The drawing shows the positions of Africa and South America on the Earth. Scientists think that these two continents are on separate tectonic plates. What is a tectonic plate?

• the largest density in our planet, separating the rocky oxide mantle from the liquid metal core.

• the innermost layers of a planet.

• piece of the Earth’s crust floating on the mantle /which moves slowly.

• the layer of silicate rock between the crust and the outer core

the diagram shows a section through part of the earth.

Fill in the blanks sequentially from A to D.

Which statements are evidence for tectonic plates?

Tick (✔) all correct statements.

• The same types of fossils have been found in different continents.

• There is more land north of the equator than south of the equator.

• Volcanoes and earthquakes are more likely to happen in particular places.

• The alignment of magnetic materials in rocks varies with the age of the rock.

• Each of the continents has parts that have different climates.

which part of the earth contains large convection current ....

Scientists also think that South America and Africa were once joined together many millions of years ago. The diagram shows present-day South America and Africa drawn next to each other. Use the diagram to explain why scientists think that the two continents were once joined .......

Which two kinds of evidence are most useful to show that South America and Africa were once joined? choose all correct answers.

• comparing their climates

• comparing their rocks

• comparing their sizes

• comparing their fossil records

• comparing their ecosystems

The map in the picture shows tectonic plate boundaries. This map would be useful in predicting the location of future..

• droughts

• earthquakes

• hurricanes

• tornadoes

Observe this diagram of a plate boundary. One statement BEST describes what is happening. It is that....

• 
  volcanic islands are forming.

• the oceanic crust is melting.

• 
  the denser oceanic crust is subducting under the less dense oceanic crust

• the tectonic plates are moving away from each other.

Scientists hypothesize that a super continent existed 200 million years ago.  This continent is called...

When pressure builds between two tectonic plates, it can suddenly release causing ...