Which statement correctly describes the outer core?

• Composed primarily of magnesium,oxygen, aluminum, and silicon, the outer core is a dense, solid layer, and is responsible for the motion of Earth's plates.

• Composed primarily of iron and nickel, the outer core is a liquid layer that rotates around the inner core, and is responsible for Earth's magnetic field.

• Composed primarily of silica particles, the outer core is the outermost layer of Earth, and varies in temperature and thickness.

• Composed primarily of magnesium and iron particles, the outer core is the middle layer of Earth, and contains the most heat.

Students are trying to tell the difference between the inner and outer   

        core.What question could they ask to best determine the difference   

        between the two layers?

• Why is the inner core thicker than the outer core?

• What makes the outer core cooler than the inner core?

• What makes the outer core denser than the inner core?

• Which layer has the greatest temperature and pressure?

What is the lithosphere?

• A another name for the crust

• the liquid layer that the crust floats on

• the uppermost solid portion of the mantle

• the uppermost solid portion of the mantle and the crust

  (Same Question) Scientists find a fossil of a fish on top of a mountain. What kind of evidence does the fossil provide scientists about the way this area might have changed over time?

• A It shows that fish were once able to live without water.

• B It shows that oceans can change quickly and become land.

• C It shows that the animals found on the mountain today evolved from fish.

• D It shows that the mountain may have once been under water and was raised by natural processes.

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

Which layer of Earth is believed to be responsible for Earth's magnetic field? 

1. From least to most dense, what is the correct order of Earth's four 

major layers?

 Moose can only survive in colder climates. Which would most likely explain finding moose fossils in an area with a warm climate?

• All organisms used to be able to survive in warm climates.

• The fossils were washed to the area by a current of water.

• The moose migrated to a warm area to reproduce.

• The area used to have a much colder climate.

Tags

NGSS.MS-LS4-1

A teacher is teaching his class about the various changes of Earth’s surface over time. He wants his students to explain the evidence that supports the claim that fossils can show proof of the changing of Earth’s surface. Which of the following statements BEST explains how students can use fossils as evidence?

•  Plant fossils can be used as evidence of Earth’s surface changing because similar fossils found in various locations supports that Earth was once a supercontinent.

• Plant fossils can be used as evidence of Earth’s surface changing because different fossils found in one specific location on Earth supports that Earth was once a supercontinent.

• Animal fossils can be used as evidence of Earth’s surface changing because different fossils found in various locations supports that Earth was once a supercontinent.

• Animal fossils can be used as evidence of Earth’s surface changing because similar fossils found in one specific location of Earth supports that Earth was once a supercontinent.

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

NGSS.MS-LS4-1

 What is the most likely reason that the bones of a Mesosaurus are found on the eastern coast of South America and on the western coast of Africa?

•   flooding

• geographic isolation

• plate tectonics

• analogous structures

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

What is the main cause of seafloor spreading?

• crustal plates sinking due to density differences

• new rock forming between two crustal plates at a mid-ocean ridge

• water pressure at great depths pushing two crustal plates apart

•  deep ocean currents forcing crustal plates apart

Tags

NGSS.MS-ESS2-1