Amplify Unit 5 Lesson 2

What did Wegener's hypothesis explain about continents separated by oceans?

• Different types of plants

• Similar rock formations and fossils

• Same weather patterns

• Different languages

What was a challenge for Wegener's hypothesis?

• Explaining the ocean's color

• Explaining landmass movement

• Explaining mountain height

• Explaining valley depth

What is Earth's deepest layer?

• Crust

• Mantle

• Outer core

• Inner core

What is the state of the outer core?

• Solid

• Liquid

• Gas

• Plasma

What supports plant life on the continent?

• Bedrock

• Subsoil

• Topsoil

• Water

What did scientists use to collect rock samples from the seafloor?

• Submarines

• Dredging equipment

• Fishing nets

• Diving suits

What theory explains the movement of continents?

• Gravity theory

• Plate tectonics

• Evolution theory

• Big Bang theory

What causes pressure on tectonic plates?

• Movement in the mantle

• Blowing wind

• Shining sun

• Falling rain

What occurs when tectonic plates slide past each other?

• New crust forms

• Plates stick and then slip

• Mountains form

• Ocean trenches form

When did Inge Lehmann announce her findings about Earth's core?

• 1926

• 1936

• 1946

• 1956