sustainable ecosystems Flashcards
what are the 4 spheres of life on earth?
atmosphere, lithosphere, hydrosphere, biosphere
What is the atmosphere, and why is it essential to life on Earth?
The atmosphere is a layer of gas surrounding Earth.
It is 78% nitrogen, 21% oxygen, and 1% other gases.
It moderates surface temperatures, acts as an insulating blanket, and blocks UV light that can cause skin cancer.
What is the lithosphere, and why is it important?
The lithosphere is Earth’s solid outer layer, consisting of rocks and minerals.
It makes up mountains, ocean floors, and extends 100 km below the surface.
It provides essential materials and a foundation for ecosystems.
What is the hydrosphere, and why is it vital?
The hydrosphere includes all the water on, above, or below Earth’s surface in solid, liquid, or gas form.
97% of it is saltwater, and it covers 70% of Earth’s surface.
Water is essential for all living organisms and processes.
What is the biosphere?
The biosphere is the area where life can exist on Earth, mostly on land and in water.
Microorganisms can live several kilometers beneath Earth’s surface.
The availability of resources limits the number of individuals in a species.
Define sustainability.
Sustainability is the ability of an environment to maintain itself in a stable manner over a long period without assistance.
What are some common Indigenous practices in the “Honorable Harvest”?
Back:
Ask permission before taking from nature and abide by the answer.
Never take the first or the last.
Harvest in ways that minimize harm.
Take only what is needed and use everything you take.
Share, show gratitude, and reciprocate the gift.
Sustain the ones who sustain you to ensure Earth lasts forever.
What is the Indigenous worldview on the connection between people and the environment?
Indigenous worldviews see people as interconnected with the land and in relationship with others.
This holistic view emphasizes physical, emotional, spiritual, and intellectual connections.
Why is it important to learn from Indigenous practices like the “Honorable Harvest”?
They teach sustainable practices that balance taking and replenishing, ensuring resources are available for future generations.
What questions should we ask about human interaction with Earth’s spheres?
How are humans’ interactions with each sphere unsustainable?
Do all humans treat the planet unsustainably?
