Mr. Richards introduces Earth's spheres and feedback loops, explaining the differences between negative and positive feedback loops. He then delves into the four main spheres of Earth: geosphere, biosphere, atmosphere, and hydrosphere, providing detailed insights into each. The video also covers the water cycle and its significance. The lesson concludes with a summary and workbook assignments for students.

What is a negative feedback loop?

• A system that moves in the same direction and destabilizes the system

• A system that only increases in intensity

• A system that moves in opposite directions and stabilizes the system

• A system that does not change

Which of the following is an example of a positive feedback loop?

• A refrigerator cooling food

• A car's cruise control system

• Erosion that worsens over time

• A thermostat regulating room temperature

Why do scientists categorize Earth's spheres?

• To make it easier to study and understand

• To make it more complicated

• To confuse students

• To create more work for themselves

What does the term 'geosphere' refer to?

• The water on Earth

• The living organisms on Earth

• The solid part of the Earth

• The gases surrounding Earth

Tags

NGSS.MS-ESS2-3

NGSS.MS-ESS3-1

Which layer of the geosphere is the thickest?

• Mantle

• Outer core

• Crust

• Inner core

What is the asthenosphere?

• The liquid outer core

• The outermost layer of the Earth

• A softer, hot layer of rock in the upper mantle

• The solid inner core

What are convection currents?

• The movement of heat through a metal

• The movement of heat through a vacuum

• The movement of heat through a liquid or gas

• The movement of heat through a solid

Tags

NGSS.MS-ESS2-6

What is the biosphere?

• The part of Earth where living things interact with nonliving things

• The part of Earth that contains only water

• The part of Earth that contains only gases

• The part of Earth that contains only rocks

Tags

NGSS.MS-LS2-3

What is the primary function of the ozone layer?

• To trap heat from the sun

• To provide oxygen for breathing

• To protect living things from the sun's radiation

• To produce carbon dioxide

What percentage of Earth's water is fresh water?

• 97.5%

• 50%

• 2.5%

• 10%

Tags

NGSS.MS-ESS2-4