Weather S4E3. Students will differentiate between the states of water and how they relate to the water cycle and weather. a. Demonstrate how water changes states from solid (ice) to liquid (water) to gas (water vapor/steam) and changes from gas to liquid to solid. b. Identify the temperatures at which water becomes a solid and at which water becomes a gas. c. Investigate how clouds are formed. d. Explain the water cycle (evaporation, condensation, and precipitation). e. Investigate different forms of precipitation and sky conditions. (rain, snow, sleet, hail, clouds, and fog). S4E4. Students will analyze weather charts/maps and collect weather data to predict weather events and infer patterns and seasonal changes. a. Identify weather instruments and explain how each is used in gathering weather data and making forecasts (thermometer, rain gauge, barometer, wind vane, anemometer). b. Using a weather map, identify the fronts, temperature, and precipitation and use the information to interpret the weather conditions. c. Use observations and records of weather conditions to predict weather patterns throughout the year. d. Differentiate between weather and climate.

S4E3 a & b Changing states of matter Solids, liquids, and gas oh my! Experiment Mr. Parr's States of Matter

Identify the temperature a liquid becomes a gas and a solid. What temperature does water become a gas? What temperature does water become a solid?

S4E3c Clouds Clouds form in air that is relatively high in humidity (the air contains a lot of water vapor). As warm air is forced up, it cools. Some o the water vapor begins to condense on dust and other particles in the air. As more and more water condenses, a cloud forms. A cloud is basically dust and condensed water.

Clouds close passage Cloud Song Experiment with Shaving Cream Clouds.

Water covers most of Earth’s surface Water covers most of Earth’s surface. This is why many people call Earth the water planet. Most of Earth’s water is in oceans. That water is salty. You can’t drink it. You can’t use it to grow plants. People need fresh water to drink, wash, and grow plants. Most of Earth’s freshwater is frozen. It is in big sheets of ice called glaciers. Earth does have some fresh water in rives and lakes. There is even fresh water underground. People pump it up to Earth’s surface.

S4E3d The Water Cycle Water is always moving. It goes from Earth’s surface into the air. Then it comes back down again. This is called the water cycle. First, the sun warms Earth’s water. Some water changes from a liquid to a gas. This gas, called water vapor, moves up into the air.

Mr. Parr Water Cycle Song In the air, the water vapor cools. It changes back to liquid water. In the clouds, water droplets join to make larger drops. When the drops become heavy enough, they fall back to Earth. The drops may fall into an ocean, a lake, or a river. They may soak into the ground. Or they may be warmed by the sun and become water vapor again. HSP Water Cycle Mr. Parr Water Cycle Song

Evaporation Evaporation is what happens when a liquid changes into a gas. Liquid water evaporates. It changes to water vapor. Water vapor is invisible. It mixes with other gases in the air. Tea kettle picture. Water boils and becomes water vapor at 100 degree C.

Condensation Condensation is what happens when a gas changes into a liquid. Water vapor cools. It changes to a liquid. Water droplets mix with bits of dust in the air. This makes clouds. Very high clouds may have tiny bits of ice because the water drops froze.

S4E3e Precipitation The water that forms in clouds return to Earth as precipitation. Precipitation is water that falls from the atmosphere to Earth’s surface. Can you name the different forms of precipitation and sky conditions?

Different forms of precipitation and sky conditions Rain, snow, sleet, hail, clouds, and fog. HSP Precipitation Precipitation close passage and foldable.

Experiment Water cycle in a bucket. Observe and Infer (page 117)

Thermometer, Barometer, Anemometer, Wind Vane, and Rain Gauge S4E4a EQ: How can I identify weather instruments used to predict and measure weather? Meteorology is the study of weather. We use many tools to forecast, or predict, future weather. Thermometer, Barometer, Anemometer, Wind Vane, and Rain Gauge

Thermometer A thermometer is a weather tool used to measure the temperature.

Barometer Barometers are important to measuring air pressure. Air pressure can help you predict good or bad weather.

Anemometer Wind speed is an important part of weather. An anemometer is a weather tool that measures wind speed.

Wind Vane By observing wind vanes, we can know the direction of the wind. Knowing the direction of the wind is an important part in predicting the weather.

Rain Gauge A rain gauge is a weather tool used to collect rain. Using measurements on the side of the rain gauge, you can see how many inches it rained. Mr. Parr Weather Instruments Song

S4E4b Weather Maps & Fronts A front is where two air masses meet. A cold front forms where a cool air mass moves under a warm air mass. The warm air is pushed up quickly. It cools and forms thick clouds. They bring heavy rain or snow. Cold fronts move fast, so the storms pass quickly. A warm front forms where a warm air mass moves over a cold air mass. The warm air slowly sides up and over the cold air. Stratus clouds form. They bring rain or snow that can last for hours. Rainfall amounts are measured by rain gauges.

Mr. Parr Weather Front Song Weather Forecasting

Weather Maps Weather maps use symbols. The map key show what each symbol means. Look at the map. Cont with page 49

Forecasting Weather Meteorologists forecast weather. They use measurements from tools on the ground. They also use data from satellites in space. They may see small changes in temperature and air pressure. But these small changes can cause big changes over time. This is why weather can not be predicted to far into the future.

Weather Patterns & Climates Weather in most places follows a pattern. It may generally be cool in the morning and warm in the afternoon. It all depends on how much sunlight you get Many places have different weather in winter, spring, summer, and fall. Climate is a place’s average weather over many years.

S4E4c Observing and Record Weather Conditions Intro daily graphing of weather.