Level 61
Level 62


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All of the water on Earth
river basin
An area of land that drains into a major river
Attraction between molecules of the same substance
An attraction between molecules of different substances
surface tension
The force that acts on the surface of a liquid and that tends to minimize the area of the surface.
capillary action
A proccess powered by adhesion that causes water molecules to move upward through a narrow tube such as the stem of a plant.
Any separation of charge into distinct positive and negative regions
specific heat
The amount of energy required to raise the temperature of 1 gram of a substance by 1 degree celcius
a large ice mass that moves slowly down a mountain or over land
the process by which molecules of water vapor in the air become liquid water
any form of water that falls from clouds and reaches Earth's surface
Run Off
water that flows over the ground surface rather than soaking into the ground
Evaporation of water from the leaves of a plant
hydraulic fracturing
Extraction of natural gas by pumping pressurized water, chemicals, and sand into the ground.
Wastewater treatment step in which sticky particle clump together to form larger pieces called floc
Deposited rocks, mud, or sand that builds up in layers.
a complex highly organized social order
Apron of a landslide
the scattered debris beyond the tow of the slid material
Measurement of the salt dissolved in water
Measurement of the acidity of water
Pollution made up of dirt particles
Pollution from fertilizers and farms made up of nitrates and phosphates
toxic chemicals
Pollution from factories made up of heavy metals like copper and iron
Pollution from fecal waste made up of harm-causing organisms like E. coli
Organisms, like algae, that convert sunlight into food
primary consumer
Organisms, like small fish, that eat algae
secondary consumer
Organisms, like large fish, that eat small fish
Organisms that eat dead and decaying organisms
surface currents
Ocean currents caused by wind
Achievement orientation
A worldview that values assertiveness, performance, success, and competition
sunlight zone
Uppermost layer of the ocean
twilight zone
Layer of the ocean with minimal light
midnight zone
Uppermost layer of the ocean that has no light
hadal zone
Ocean trench zone
A region or area bounded peripherally by a divide and draining ultimately to a particular watercourse or body of water
Level 63