science4q4w4-Weather instruments.pptx

weather instruments

1. Weather instruments Science 4 week 4

2. Learning competency Use weather instruments and describe the different weather components in a weather chart Learning objectives Knowledge - Describe the different weather components of a weather chart Skills - Use weather instruments to measure the different weather components Attitude – Show appreciation on the importance of weather instruments

3. Definition of terms Meteorologist - is a scientist who studies and works in the field of meteorology aiming to understand or predict Earth's atmospheric phenomena including the weather. Weather - is the state of the atmosphere, describing for example the degree to which it is hot or cold, wet or dry, calm or stormy, clear or cloudy. Climate - is the long-term weather pattern in an area, typically averaged over 30 year.

4. Factors that affect weather Air Temperature Air pressure Humidity Kind of Cloud Cover Amount of Precipitation Wind speed Wind direction

5. Factors that affect weather Air Temperature - degree of hotness or coldness measured on a definite scale. Air pressure - is the  weight of air molecules pressing down on the Earth . The pressure of the air molecules changes as you move upward from sea level into the atmosphere. The highest pressure is at sea level where the density of the air molecules is the greatest. Humidity - is the concentration of water vapor present in the air.

6. Factors that affect weather Kind of Cloud Cover Amount of Precipitation Wind speed Wind direction

7. VIDEO LESSON https://www.youtube.com/watch?v=hwlr__G0Go0

8. Meteorologist use different instruments to measure weather condition. These instruments and measurements allow meteorologist to make predictions on weather conditions in the near future. The following are the common instruments in studying weather.

9. thermometers Thermometers - measure the high and low outdoor temperatures in degrees Fahrenheit and degrees Celsius. Most thermometers are closed glass tubes containing liquids such as alcohol or mercury. When air around the tube heats the liquid, the liquid expands and moves up the tube. A scale then shows what the actual temperature is.

10. barometer Barometer-  measures air pressure. It tells you whether or not the pressure is rising or falling. A rising barometer means sunny and dry conditions, while a falling barometer means stormy and wet conditions.

11. anemometer Anemometer - measures the direction and speed of the wind in miles per hour. A common type of anemometer has three cups fixed to a mobile shaft. As the wind blows faster, the cups spin around faster. The actual speed of the wind shows up on a dial.

12. Hygrometer Hygrometer- measures temperature and humidity using degrees Celsius and degrees Fahrenheit. Humidity is the concentration of water vapor present in the air. Water vapor, the gaseous state of water, is generally invisible to the human eye. Humidity indicates the likelihood for precipitation, dew, or fog to be present.

13. Rain gauge Rain Gauge-  measures the amount of rain that has fallen over a specific time and period.

14. Wind vane Wind Vane- measures the direction of the wind at any given point in time. A weighted arrow spins around a fixed shaft points north, south, east, or west, typically marked on separate fixed shafts parallel the arrow

15. Campbell stokes recorder Campbell Stokes Recorder - measures sunshine. Sunlight shines into one side of a glass ball and leaves through the opposite side in a concentrated ray. This ray of light burns a mark onto a thick piece of card. The range of the burn mark indicates how many hours the sun shone during that day.

16. Weather charts Weather charts are the fundamental basis for weather analysis and forecasts. They are based on the data collected by weather stations on the ground and on the data recorded at high altitudes by probes and satellites. Most modern instruments are able to guarantee a continuous recording of atmospheric data, but the weather charts are created using the data recorded at preset conventional timings, so that they may be comparable with one another in different locations around the world

17. Weather Forecast Palawan will be experiencing cloudy skies with scattered rain showers and thunderstorms. Wind will be blowing from southwest to west at light to moderate windspeed. Chance of rain at 90- 95% with possible flash floods or landslides due to moderate to heavy rains at 4-8mm. Temperatures will be between 25.2 °C - 32.9 °C. Relative humidity is measured at 62% - 88%.

18. Direction: Write True if the statement is correct and False it is wrong. _________1. If the arrowhead of the wind vane faces the south direction, the wind is blowing North. _________2. Temperature is at its highest at noon time. _________3. A thermometer is used to measure air temperature. _________4. Temperature is the hotness and coldness of air. _________5. Temperature is high during rainy days.