1. Chapter E2
Section 1 The Cycles of Matter
Do Now
What are the three different physical states of water that are found on Earth? Name one way that you use water in each of these states in your daily life.
Write your answers in your science journal.

2. MS-PS1-2
The Water Cycle
Objectives
Diagram the water cycle, and explain its importance to living things.

3. MS-PS1-2
The Water Cycle
Agenda
Today we will:
Day 1
Complete a do now

4. Vocabulary MS-PS1-2 evaporation condensation precipitation
The Water Cycle
Vocabulary
evaporation
condensation
precipitation
transpiration

5. The Water Cycle Chapter H1
Section 1 The Active River
The Water Cycle
What Is the Water Cycle? The water cycle is the continuous movement of Earth’s water from the ocean to the atmosphere to the land and back to the ocean.
Powering the Water Cycle The water cycle is driven by energy from the sun.

6. Chapter E2 The Water Cycle
Section 1 The Cycles of Matter
Chapter E2
The Water Cycle
The movement of water between the oceans, atmosphere, land, and living things is known as the water cycle.
How Water Moves During evaporation, the sun’s heat causes water to change from liquid to vapor.
In the process of condensation, the water vapor cools and returns to a liquid state.

7. The Water Cycle, continued
Section 1 The Cycles of Matter
Chapter E2
The Water Cycle, continued
The water that falls from the atmosphere to the land and oceans is called precipitation. Rain, snow, sleet, and hail are all forms of precipitation.
A small percentage of the water from precipitation is frozen as snow and ice and does not return back to the cycle right away.
Most precipitation falls into the ocean.
The precipitation that falls on the land and flows into streams, rivers, and lakes is called runoff.

8. Infiltration is the process that creates Groundwater
Infiltration is the process that creates Groundwater. Groundwater is precipitation that seeps into the ground and is stored between or within rocks. Groundwater slowly flows back into the soil, streams, rivers, and oceans.

9. Section 1 The Cycles of Matter
Chapter E2
The Water Cycle

10. Water Cycle Chapter H1 Section 1 The Active River
Click below to watch the Visual Concept.
You may stop the video at any time by pressing the Esc key.
Visual Concept

11. The Water Cycle, continued
Section 1 The Cycles of Matter
Chapter E2
The Water Cycle, continued
Water and Life Without water, there would be no life on Earth. All organisms, from bacteria to animals and plants, are composed mostly of water.
Water helps transport nutrients and waste within an organism.
Water helps regulate temperature.
All water taken in by an organism is eventually returned to the environment.

12. About 70% of the Earth is covered in water.
Only 1% of that water is drinkable (potable).

13. ALL CHANGES OF STATE ARE PHYSICAL CHANGES
Change of State
Change of state is the change of a substance from one physical form to another.
ALL CHANGES OF STATE ARE PHYSICAL CHANGES

14. Melting (endothermic) heat in
Melting is the change of state from a solid to a liquid.
Adding energy to a solid increases the temperature. As the temperature increases, the particles of the solid move faster and faster. Once the substance reaches it’s MELTING POINT, it becomes a liquid.

15. Boiling (endothermic) heat in
Boiling is the change of a liquid to a vapor or gas.
Boiling occurs when the vapor pressure of the substance reaches the atmospheric pressure. The temperature at which this occurs is called the boiling point.

16. Sublimation (endothermic) heat in
Sublimation is the change of state where a solid turns directly into a gas. Skipping the liquid phase.
During sublimation, the particles must gain enough energy to overcome their attraction, going from being very tightly packed together (as a solid) to rapidly moving and spreading apart (as a gas).

17. Freezing (exothermic) heat leaving
Change of state from a liquid to a solid.
Freezing is the reverse of melting so the melting point and freezing point for a substance is the same.
During the freezing process, energy is removed from the substance causing the particles to slow which creates an attraction between them. The particles slow until they lock (or freeze) into place.

18. Evaporation (Exothermic)
Evaporation is the change of a substance from a liquid to a gas.
Evaporation does not mean boiling. A substance can evaporate without boiling, for example sweat.

19. Condensation (exothermic) heat leaving
Condensation is the change of state from a gas to a liquid.
The condensation point is the temperature at which a gas becomes a liquid.
During condensation, the fast moving particles of a gas clump together as energy (or heat) is removed.

20. Chapter K2
Section 3 Changes of State

21. Exit Ticket MS-PS1-2 Why is water so important?
The Water Cycle
Exit Ticket
Why is water so important?
How does water change state and move around on earth?

22. MS-PS1-2
The Water Cycle
Homework