Bell Ringer

Describe the water cycle in complete sentences.

Discover Activity

You are going to observe pond water from Sanford NC

Draw what you see under the microscope.

MaterialsPond water

Microscope

Plastic Dropper

Slide

Cover slip

Paper

Pencil

Headwater

Streams that come together and from a river.

Theses streams flow into a small river.

Tributaries

Streams and rivers that feed into a main river.

Flow downward because of gravity

River System

A river and all of its tributaries

Watershed

Land area that supplies water to a river system.

Divide

One watershed that is separated from another by a ridge of land

Streams on each side flow in different directions.

Ponds and Lakes

Form when water collects in hollows and low lying areas of lands.

Also can be created by a dam (man-made)

Reservoir

A lake that stores water for human use.

Lakes

Change for many reasons.

Besides seasonal change a lake can undergo long term changes and lead to its death.

Seasonal ChangesAs the top layer cools, it becomes denser and sinks. This causes the lake waters to mix. This mixing, also called turnover, causes materials to rise from the lake bottom.This refreshes the nutrients

Nutrients

Substances such as nitrogen and phosphorus that enable plants and algae to grow.

Eutrophication.

Algae

Blocks out sunlight because it becomes to thick

No sunlight

No photosynthesis

Death to pond/lake

Homework

Pg. 73

Write out the question first

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