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Chapter 7 Science Study Guide Water can change state. What are the three states of water? Gas, liquid, and solid What are the four parts of the water cycle? Evaporation, condensation, precipitation, and runoff (sublimation) In what part of the water cycle does dew form? condensation About how much of the earth’s surface does the ocean cover? About 75% or ¾ The ocean is a major reservoir in the water cycle. What determines weather? Air temperature, pressure, humidity, wind speed and direction, precipitation What does a barometer do? Measures barometric pressure What happens when water vapor freezes? It becomes frost. What carries warm water towards the poles? If these weren’t present how would the temperature vary? Currents carry warm water to the poles if this did not happen the water and land surrounding would be much cooler. What vocabulary term matches this definition: Useful products that come from the ocean Resource What is the difference between weather and climate? What would a forecaster study if asked to look at weather? Climate? Climate is yearlong and constant while weather changes day to day. A forecaster would study factors of weather on a daily basis and for climate they would analyze yearlong data. What is the difference among cirrus, altocumulus, and stratus clouds (What do they look like? At what altitude are they found?) Cirrus: thin and wispy; high altitudes Altocumulus: small puff balls; mid-level altitudes Stratus: cover the whole sky and look dark because sunlight can’t penetrate all the layers; low altitude How might the particles that make up a snowman end up in the ocean? The snowman will melt and become runoff which leads to the ocean.