1. Earth: The Water Planet

2. Water is essential for living things to grow, reproduce, and carry out important processes.   About 97% of Earth’s water is salt water found in the ocean, while the other 3% is fresh water, with the majority of that 3% found in huge masses of ice near Earth’s poles.

3. H2O – chemical formula used to represent water’s unique structure which is made of two hydrogen (H) atoms bonded with one oxygen (O) atom to form a water molecule   Water is a polar molecule, meaning the positive hydrogen end of one water molecule attracts the negative oxygen ends of another

4. Water’s unique properties
Surface tension – molecules on surface of water cause a tightness, almost giving water a “skin”.
Universal solvent – water is known as the universal solvent because many substances dissolve it in.

5. Water’s unique properties
Capillary action – allows water to move through materials with pores or narrow spaces (ex. water traveling up stems to leaves)
Changing state – water can change into all states of matter (solid, liquid, gas) within Earth’s temperature range.
evaporation – process of liquid changing to gas at surface
condensation – process of gas changing to a liquid
melting – process of changing a solid to liquid using heat

6. The Water Cycle
Continuous process by which water moves through the living and nonliving parts of the environment. Sun is the energy source that drives the water cycle
Key Vocabulary Words:
Precipitation
Infiltration
Condensation
Transpiration
Aquifer
Evaporation
Ground Water

7. What is the water cycle?
Water constantly moves among the oceans, the atmosphere, the solid Earth (groundwater), and the biosphere.
This unending circulation of Earth’s water supply is the water cycle.
Teacher Actions: Direct students to record information on the RH side of their notebook
Student Actions: Students record notes

9. evaporation – most takes place over the ocean
transpiration – plants release water to air through leaves
condensation – clouds form as water vapor cools
precipitation – water droplets in clouds become heavy and fall back to Earth
groundwater – water that fills the spaces in soil and rock layers

10. Evaporation Evaporation: Water changes from a liquid to a gas or vapor
Most takes place over the ocean
Accounts for 90% of the moisture that enters the air

11. Transpiration
Transpiration occurs when plants release water into the atmosphere.
About 10% of moisture in the air.

12. Condensation
Water vapor cools as it rises, and it changes back into a liquid
-Forms clouds
-Opposite of evaporation

13. Precipitation
Precipitation is when water is released from clouds in the form of rain, sleet, freezing rain, snow, or hail.

14. Infiltration and Ground water
Water moves and is soaked into rock and soil through cracks and pore spaces. This is referred to as ground water.

16. Water
Cycle
Foldable
Outside: Draw a picture for each part of the water cycle
Inside flap: On each flap, write what happens during each step
Inside back: Draw a picture of how each step works together
Teacher Actions: Direct students to pages in textbook
Student Actions: Students record notes in the foldable

17. Teacher Actions: Direct students to pages _________ in textbook
Student Actions: Students record notes in the foldable