This resource supports standard 4 of the New York math, science and technology standards. Standard 4 states: students will understand and apply scientific concepts, principles, and theories pertaining to the physical setting and living environment and recognize the historical development of ideas in science. The major understandings being supported are 2.1d-f. Major understanding 2.1d states: Weather variables are measured using instruments such as thermometers, barometers, psychrometers, precipitation gauges, anemometers, and wind vanes. Major understanding 2.1e states: Weather variables are interrelated. For example, temperature and humidity affect air pressure and probability of precipitation; and air pressure gradient controls wind velocity. Major understanding 2.1f states: Air temperature, dewpoint, cloud formation, and precipitation are affected by the expansion and contraction of air due to vertical atmospheric movement.