EARTH'S STRUCTURE AND COMPOSITION

Sally is researching the differences that exist in each layer of the Earth. Which of the following best describes Earth's crust?

• Solid, rocky

• Liquid, metallic

• Semisolid, convecting

• Dense, extremely hot

Tectonic plates are made up of continental crust and ________ crust.

• continental

• oceanic

• plates

• mantle

The core is mostly made up mostly of which elements?

• Oxygen and Silicon

• Silicon and Magnesium

• Nickel and Iron

• Iron and Magnesium

This is the outermost, rigid layer of the Earth, made up of two parts. It is divided into pieces called tectonic plates.

• Inner Core

• Asthensophere

• Lithosphere

• Outer Core

Which of the following is true regarding the composition of the lithosphere?

• The lithosphere is mostly liquid, with some medium-density materials, such as silicon

• The lithosphere is more plastic and flows slowly compared to the solid crust of Earth

• The lithosphere includes the core and the lower portion of the mantle

• The lithosphere includes the crust and the uppermost portion of the mantle, which is solid and rigid

Which layer is made (mostly) of LIQUID iron and nickel?

• crust

• mantle

• outer core

• inner core

Which of the following is not part of 7 major tectonic plates?

• Pacific plate

• South American plate

• Nazca plate

• Eurasian Plate

According to Plate Tectonic Theory, The entire lithosphere is broken down into numerous segments called _____________?

• Plates

• Map

• Lines

• Belts

Which of the following is incorrect about oceanic plates?

• 5-10 km thick

• made of mostly basalt

• newer rocks

• less dense

which of the following is true about continental and oceanic crust?

• They are made up of liquid

• Both of them are part of lithosphere

• They are both older rocks

• Oceanic crust is thicker than the continental crust