Water Use and Sources
What is 1 way to reduce your water use?
Take a shorter shower, eat less meat, recycle more often, etc.
What property of water lets it dissolve most things?
Water is the Universal Solvent
A tree root grows into a rock and breaks it in half. Is this physical or chemical weathering?
Physical Weathering
What is an example of an impervious surface?
Concrete, asphalt, solid rock, etc.
What are the 3 main areas of stream health?
Physical, chemical, biological
Where does most of our drinking water come from?
Groundwater/aquifers
What property lets a paperclip float on water
Surface Tension
A car rusts after it rains. Is this physical or weathering
Chemical weathering
What is an example of a non-impervious surface?
Grass, dirt, mulch, etc.
What is a watershed?
The common area where all where rain, streams and groundwater go to
What is a 'saltwater intrusion?'
Where groundwater and ocean salt water mix
A scientist notices the air temperature is 25°C and the water temperature is only 13°C. What property explains this?
High Heat Capacity
What is the difference between physical or chemical weathering?
Physical - rock becomes smaller
Chemical - rock changes color or molecules
What is the name of the pollution water collects and "runs" into our rivers
Runoff
Why are pollution sensitive species only in healthy streams?
Because if there was pollution, they would not live their or die off
A teacher decides to save water and shortens their shower from 20 minutes to 10 minutes. Their shower uses 3 gallons per minute. How much water do they save by shortening their shower?
30 gallons of water
Why does water float when it freezes?
What becomes less dense when it freezes
Give an example of physical weathering
Erosion, ice breaking rock, tree roots breaking rock, etc.
Are there more or fewer impervious surfaces today than 50 years ago?
More impervious surfaces
What is 1 benefit of having lots of plants and trees around a stream?
More dissolved oxygen, less erosion, more stable stream banks, etc.
How has climate change affected our water sources?
Higher sea levels, more saltwater intrusions, less water in aquifers, etc.
What property of water explains why erosion happens?
Cohesion/Adhesion
Give an example of chemical weathering
Rusting, acid rain, etc.
Why are more impervious surfaces bad for our water?
More impervious surfaces means more runoff and pollution in the water
What process contributes to issues like pollution in streams, algae blooms and high pH levels?
Runoff that carries pollution to water sources