Question

recognizing similarities and differences
one reading skill is the ability to recognize similarities and differences between two phrases, ideas, or things. this is sometimes known as comparing and contrasting.
read the following question and write the answer in the space provided.

1. how are the outer core and the inner core alike? how are they different?

recognizing cause and effect
one reading skill is the ability to recognize cause and effect.
read the following question and write the answer in the space provided.

1. why do the tectonic plates move?

Explanation:

1. Similarities: Both the outer core and inner core are made mainly of iron - nickel alloys and are at extremely high temperatures. Differences: The outer core is liquid due to high temperatures and pressure conditions allowing the metals to flow, while the inner core is solid because the pressure is so great that it prevents the iron - nickel material from melting despite the high temperature.
2. Tectonic plates move due to convection currents in the mantle. The heat from the Earth's interior causes the semi - molten rock in the mantle to move in a circular pattern. This movement exerts a force on the tectonic plates above, causing them to move.

Answer:

1. Similarities: Composed mainly of iron - nickel alloys, high temperatures. Differences: Outer core is liquid, inner core is solid.
2. Due to convection currents in the mantle.