Science 10 Quarter 1 - Review

What makes up the lithosphere?

• Upper mantle

• Continental crust

• Crust and upper mantle

• Oceanic and continental crust

The movement of the lithospheric plates is facilitated by a soft, weak and plastic-like layer. Which layer is described in the statement?

• Asthenosphere

• Atmosphere

• Lithosphere

• Geosphere

Which of these phrases is FALSE about lithospheric plates?

• vary in thickness

• thickest in the mountain regions

• include the crust and upper mantle

• have the same thickness everywhere

What do you think is the basis of scientists in dividing Earth’s lithosphere into several plates?

• the uneven distribution of heat in the globe

• a cycle of high and low tides during full moon

• brightness of stars and formation of constellations in the sky

• the occurrence of earthquake, volcanism and mountain formation

How will you relate the distributions of mountain ranges, earthquake epicenters and volcanoes?

• Mountain ranges are found only in places where volcanoes are situated.

• Mountain ranges are found only in places where earthquake epicenters are situated.

• Mountain ranges are found in places where volcanoes and/or earthquake epicenters are also situated.

• Mountain ranges are found in places between where volcanoes and earthquake epicenters are also situated.

As a new seafloor is formed at the mid-ocean ridge, the old seafloor farthest from the ridge is destroyed. Which process describes how the oceanic crust plunges into the Earth and destroyed at the mantle?

• Convection

• Construction

• Diversion

• Subduction

When two tectonic plates collide, why does the oceanic crust usually subduct beneath the continental crust?

• denser than continental crust

• less dense than continental crust

• thicker than continental crust

• thinner than continental crust

It is believed that Earth was once a supercontinent called Pangaea. If the inner layers of the Earth are firm solid, what could have happened to Pangaea?

• It remained as a supercontinent

• It would have become as it is today

• It could have slowly disappeared in the ocean

• It would have stretched and covered the whole world

Which can be inferred from the continuous movement of the lithospheric plates over the asthenosphere?

• All continents will cease to exist

• All the volcanoes in the Philippines will become inactive

• The islands of the Philippines will be scattered all over the world

• The continents will not be located in the same place as they are now.

Iron-rich minerals like magnetite provide evidence that the Earth has a magnetic field. What happens to the minerals as the magnetite starts to cool?

• The minerals becomes magnetized, aligning to the magnetic field

• The minerals becomes magnetized, pointing away from the magnetic field

• The minerals becomes unmagnetized, aligning to the magnetic field

• The minerals becomes unmagnetized, pointing away from the magnetic field