Upgrade to remove ads
Unit 6 - stability and change
Terms in this set (33)
Where Earth's water is likely to have come from.
First a gas, then a liquid as Earth cooled.
How Earth's water evolved into what it is today.
combustion, photosynthesis, and respiration
THREE processes work together to keep the water on Earth at EQUILIBRIUM.
Evaporation (water cycle)
Liquid water on Earth's surface changes into a gas from the Sun's energy.
Condensation (water cycle)
Gas water molecules get closer and form tiny droplets in clouds.
Precipitation (water cycle)
Liquid water (rain) or solid water (snow) falls back to Earth's surface.
Runoff (water cycle)
Some water travels over the surface into streams, rivers, lakes and the ocean.
Infiltration (water cycle)
Some water soaks into the ground and is stored.
During evaporation, the water is evaporated, while the salt is not. In addition, during infiltration, as the water passes through layers of rock and sand, it is cleaned and can then be accessed from underground.
Two ways that the water cycle "cleans" water and makes it usable freshwater.
97 - 98% (a lot)
How much (what percent) of the water on Earth is unusable.
2.5% (very little)
What percent of Earth's water is usable or freshwater.
Where a lot of Earth's freshwater is locked up in and makes it inaccessible for use.
Natural variation in rainfall and temperatures
Change in usage for agricultural and domestic purposes (toilets, showers, pools, watering lawns...)
Factors that change water's locations and accessibility over time on Earth.
As an area is more populated, more people will be using the water for hand washing, drinking, toilet, etc.
Businesses will also most likely pop up with more frequency and they will use more water too
Connection between population and water use.
In the beginning, there was no oxygen in Earth's atmosphere.
At photosynthesis evolved, oxygen was put into the atmosphere and makes up about 20% of it now
How Earth's atmosphere changed over time.
Along plate boundaries with volcanic activity
Where deposits of minerals (examples: copper, gold) are found on Earth.
Two ways humans change Earth's land.
Burning fossil fuels
Cutting down trees that photosynthesize (deforestation)
Two ways humans change Earth's air.
The cycles and dependent systems that support life must be protected so that all forms of life can continue to maintain an equilibrium on Earth.
Why life is considered a renewable resource.
Ancient oceans (not on land).
Where Earth's life first started.
Microbes from about 3.7 billion years ago (BYA)
How long life has existed on Earth.
What about 82% of life on Earth is made up of.
Only about 200,000 years (very little) of Earth's history.
About how long humans have been around on Earth.
Disrupting ecosystems/destroying habitats
Three impacts humans have on Earth's life resources.
Energy sources powered by the Sun.
Fossils from ancient ocean life.
What fossil fuels formed from.
Physical material that humans need and value
A resource that can be easily replaced by natural cycles or can never be used up
Meeting the needs of a community, or a population, without compromising the ability of other communities, or future generations to meet their needs.
All life on Earth, as well as the nonliving elements that support life (like sunlight and water)
Materials from living things, usually plants, that is used as a fuel
The process that causes an organism to no longer have any living examples on Earth
Something of value, use, or need that cannot be renewed or replaced by natural cycles or good management
THIS SET IS OFTEN IN FOLDERS WITH...
Unit 5 Review - thermal energy
Unit 7 Review (human impacts)
Unit 8 - selection and adaptation
Newton's Laws (distance learning)
OTHER SETS BY THIS CREATOR
Final Exam Review 20-21
Midterm Review 20-21
Unit 3 (forces and energy)
Unit 2 Review: Chemical Reactions
OTHER QUIZLET SETS
Lesson 2 How do we classify animals
HIM 343 Quiz 3
Exploring Biology in the Laboratory - Mi…
Anthropology Quiz questions for Exam 1