The Power of Water
|
Title: Awesome power of water |
Author: Cota |
|
|
Subject: Science |
Grade: 6th |
|
|
Week: |
Unit/Lesson Plan #: |
|
|
Unit theme:
|
Textbook references:
|
|
|
Learning objectives:
Learn the Properties of Water
Water's Chemical Properties
|
Key Questions, Concepts, or Themes: polarity adhesion capillary action cohesion surface tension solvent abilities polar molecules, non polar molecules
|
|
|
Stage 1: Water has three stages: Gas, liguid & solid. Water's chemical description is H2O. one atom of oxygen bound to two atoms of hydrogen. The hydrogen atoms are "attached" to one side of the oxygen atom, resulting in a water molecule having a positive charge on the side where the hydrogen atoms are and a negative charge on the other side, where the oxygen atom is. Since opposite electrical charges attract, water molecules tend to attract each other, making water kind of "sticky." All these water molecules attracting each other mean they tend to clump together. This is why water drops are, in fact, drops! If it wasn't for some of Earth's forces, such as gravity, a drop of water would be ball shaped -- a perfect sphere. Water is called the "universal solvent" because it dissolves more substances than any other liquid. This means that wherever water goes, either through the ground or through our bodies, it takes along valuable chemicals, minerals, and nutrients. Pure water has a neutral pH of 7, which is neither acidic nor basic.
|
||
|
Stage 2: Introducing water as a resource: 1. Have you ever thought what happens to water after you have used it? 2. Have you ever thought about how water entres the atmosphere?
An important and vital resource water may be something we take for granted. Water is an important part of everyday life, getting a drink, cooking to taking a shower. However, this isn't the case everywhere as you learned from the water exhibit safe drinking water may be scare in many regions of the world.
Water is vital to the function of our Earth's systems: The atmosphere: part of the earth's system includes the mixture of gases that the surround the planet. The biosphere: Part of the Earth's system includes all living things plants, animals and other organisms. The Geosphere: Part of the Earth System includes the crust, mantle, and inner and outer core. The hydrosphere: Part of the Earth's system is the planets waterincluding oceans, lakes, rivers, ground water, ice and water vapor. These systems have been working together since the Earth's beginning about 4.5 billion years ago. The are still working, because the Earth is always changing even though we can't always observe these changes.
|
||
|
Stage 3: The polarity of water
|
||
|
Homework: No homework in this class? |
Assessments: (attach/link copies) __ Group assessment __ Observation of process/student work __ Self-assessment by student __ Teacher generated assignment __ Written project __ Test/Quiz __ Other: ____________________________________ |
|
)
near the oxygen atom due the unshared pairs of electrons, and partial
positive charges (
) near
the hydrogen atoms.
- Login to post comments