Unit 4 Weather and Climate
4.1
Lesson 1 Elements of Weather p. 154 - 161
Essential Question: What is weather and how can we describe different types of weather?
Vocabulary:
weather – the short-term state of the atmosphere, including temperature, humidity, precipitation, wind, and visibility
humidity – the amount of water vapor in the air
relative humidity – the ratio of the amount of water vapor in the air to the amount of water vapor needed to reach
saturation at a given temperature
dew point – at constant pressure and water vapor content, the temperature at which the rate of condensation equals
the rate of evaporation
precipitation - any form of water that falls to Earth’s surface from the clouds
air pressure – the measure of the force with which air molecules push on a surface
wind – the movement of air caused by differences in air pressure
visibility – the distance at which a given standard object can be seen and identified with the unaided eye
*psychrometer – an instrument that is used to measure relative humidity
*anemometer – an instrument used to measure wind speed
*barometer – an instrument used to measure air pressure
Lesson 1 Elements of Weather
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What is weather?
What is temperature and how is it measured?
What is humidity and how is it measured?
What is precipitation and how is it measured?
What is air pressure and how is it measured?
What is wind and how is it measured?
What is visibility and how is it measured?
What are some ways to collect weather data?