Today

• Check out a Netbook• Get on omsteamraiders.pbworks.com• Science page• Tuesday Website worksheet on Estuaries &

Cape Fear Watershed• Put questions and answers in Science

Notebooks• I will be calling up to tell you grades and missing

assignments.

A new community settles in a remote area. The citizens hold a meeting to determine the first priorities for their community…

what is the most important thing to do? WHY?

Reminders

• Homework due Friday• Missing Coach book

Estuary

• When fresh & salt water met• How do they not continue to mix?– Freshwater sits on top of salt water

Stewardship

• Taking care of the Earth• So we will be a good stewardship of Ms.

Myers’ room• From here on out we will say the word

Stewardship when we clean and take care of the room

Cleaning Up the Earth

• Can be expensive and difficult• Preventing pollution is the easiest ways to

protect our Earth– Do not litter, be aware of what you are doing to

the Earth,

2 types of pollution

• Point-source pollution• Non-point source pollution

Point-source Pollution

• Pollution that comes from a single source• Examples– Oil spolling from a supertanker into an ocean or

river – Drainpipe spilling water into a river

Non-point source pollution

• Pollution that come from many places or an unidentified source

• Examples– Rain carries pollution– Fertilizers carried by runoff

Identify

• Next you will identify a situation as point source or non-point source

Damaged sewer pipes or systems

Chemical runoff from agricultural fields, golf courses, and lawns

Waste runoff from feedlots

Leaking underground oil tanks

Soil from farms

Release of heated water from power plants into streams

Switch partners

Release of raw sewage from wastewater treatment plants

Acid rain

Mercury pollution from coal-burning power plants

Release of chemicals from papermills into streams

Salts from irrigation of farm fields

Release of dishwasher or sewage from homes directly into streams

Sand, grit , oil, and gasoline from city and suburban streets

Answers

Damaged sewer pipes or systems

Point

Chemical runoff from agricultural fields, golf courses, and lawns

Non-Point

Waste runoff from feedlots

Non-point

Leaking underground oil tanks

point

Soil from farms

Non-point

Release of heated water from power plants or factories into streams

Point

Release of raw sewage from wastewater treatment plants

point

Acid rain

Non-point

Mercury pollution from coal-burning power plants

Non-point

Release of chemicals from papermills into streams

point

Salts from irrigation of farm fields

Non-point

Release of dishwasher or sewage from homes directly into streams

point

Sand, grit , oil, and gasoline from city and suburban streets

Non-point

Pollution of Oceans

• Eventually flows to the ocean • Your are not allowed to dump in the oceans.

Pollution of Groundwater

• Rain into soil (with pollution) Groundwater aquifer= Water source polluted

Estuaries

• Freshwater from a river meets and mixes with salt water from the ocean

• AKA: bays, harbors, lagoons, or sounds.

Tides

• Freshwater flows down• Rising tides push ocean water into river– High tide, the salt water further up stream. – Low tide, saltwater is pushed farther downstream

by the river water.

Therefore, the SALINITY changes throughout the day as the tide rises and falls.

Organisms

• Can tolerate the fresh and saltwater• Sea grasses and marsh grasses grow in and along

the edge of the water. • Grasses and other plants provide food & shelter for

other organisms• Fish, crab, clams, and other shellfish live well in

these conditions• Estuaries are nurseries for many animals, including

some ocean animals that swim to estuaries to breed

Estuaries

• Estuaries are protected from ocean waves by land features. – Barrier islands, reeds, or sand spits.

A family living in a house needs to dig a new well before they will have usable water. Which location would be the best choice for the new

well?

Water Laws

• The Clean Water Act was passed in 1972. – Goal:• “the protection of fish, shellfish, and wildlife and

recreation in and on the water. “• Pays for wastewater treatment

Water Laws

• The Safe Drinking Water Act 1974. – Set standards for the quality of drinking water– Test and evaluate drinking water

Other Laws

• U.S. Marine Protection, Research, and Sanctuaries Act – 1972. NO Dumping in water

Water Quality