Chapter 6

According to Halley's model, what was Earth's basic structure?
         

• A solid sphere with a molten core

• A rocky outer shell and inner sphere separated by glowing air

• Multiple layers of different rock types

• A completely hollow sphere with no internal structure

 How many sets of magnetic poles did Halley propose in his model?
   

• One set on the surface only

• Three sets at different depths

• Two sets: one permanent and one moving

• Four sets rotating at different speeds

Tags

NGSS.MS-PS2-3

 Why did Halley believe the inner magnetic poles moved over time?
         

• Due to changes in Earth's temperature

• Because of gravitational forces

• The inner sphere rotated faster than the outer shell

• The inner sphere rotated slower than the outer shell

What unique belief did Halley have about Earth's inner sphere?
         

• It was made of pure gold

• It was completely frozen

• It was habitable like Earth's surface

• It produced its own light source

How did Halley's model relate to common beliefs of his time?
         

• It completely contradicted all existing beliefs

• It aligned with beliefs about deep caverns in Earth

• It was the first to suggest Earth had an interior

• It proved all previous theories wrong

Scientists use ___________ to collect rock samples from the ocean floor.

• drills

• seashores

• earthquake

• siesmic waves

1. The deepest hole ever drilled is known as the ____________.

• Kola Superdeep Borehole

• Superdeep crust

• Superdeep oceanic crust

• Superdeep mantle

The study of _________________ helps scientists understand Earth's deep interior.

• Seismic waves

• electromagnetic waves

• manual waves

• earthquake

Tags

NGSS.HS-ESS2-3

________________ evidence includes data from earthquakes and gravity measurements.

• direct

• indirect

• direct and indirect

• direct nor indirect

1. What is the main challenge when exploring the ocean floor?

• • Lack of interest

• • Cost of equipment

• • Difficulty in accessing it

• • Lack of scientific importance

Tags

NGSS.MS-ETS1-2