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6 th Grade SOL Review. Unit 1 – Scientific Method. Unit 2 - Matter. Unit 3 – Properties of Water. Adhesion vs. Cohesion Adhesion – water sticking to other things Cohesion – water sticking to other water molecules. Surface Tension. Capillary Action. Changing States. Review Questions.
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Unit 3 – Properties of Water • Adhesion vs. Cohesion • Adhesion – water sticking to other things • Cohesion – water sticking to other water molecules
Review Questions • What causes water to change states of matter? • Temperature • Water is often called the universal solvent. Why • A large number of substances will dissolve in water. • What is it called when water goes from a liquid to a gas? • Evaporation
Instruments • Barometer • Measures air pressure • Drop in pressure means precipitation is coming
Anemometer • Measures wind speed
Thermometer • Measures temperature
Weather Vane • Measures wind direction
Sling Psychrometer • Measure humidity
Hygrometer • Measure humidity
Review Questions • What instrument measures temperature? • Thermometer • What instrument s measure humidity? • Hygrometer and Sling Psychrometer • What instrument measures wind speed? • Anemometer • What instrument measures wind direction? • Weather Vane • What instrument measures air pressure? • Barometer
Review Questions • What are the normal fluffy clouds? • Cumulus • What are the wispy high-level clouds? • Cirrus • What are the layered clouds that are associated with precipitation? • Stratus • What are the fluffy clouds associated with precipitation? • Cumulonimbus
Review Questions • Which layer of the atmosphere has the most mass? • Thermosphere • Which layer of the atmosphere has weather and clouds? • Thermosphere • What layer of the atmosphere has the ozone layer? • Stratosphere
The Water Cycle and the Sun • The Sun powers the water cycle. • Solar power causes water in the ocean to evaporate (3) , condense (2) into clouds and fall back to Earth.
Earth’s shape and tilt • Earth is round. • Different parts get different amounts of sunlight. • The equator gets the most direct sunlight. • The poles get indirect sunlight.
Air pressure and Wind • Wind is moving air. • Differences in air pressure cause wind. • Warmer areas have low pressure. • Cooler areas have high pressure. • Air moves from high pressure areas into low pressure areas.
Sea Breezes • During the day the land heats more quickly than the water does. • Warmer air rises over the land. • Cooler air sinks over the water. • A breeze moves from the water to land.
Land Breezes • At night the land cools more quickly than the water does. • Warmer air rises over the water. • Cooler air sinks over the land. • A breeze moves from the land to water.
Review Question • How do land breezes happen? • Air cools faster over land and moves H to L • How does the Earth cause weather? • Tilt • High pressure areas are associated with what kind of air? • Cool air
(1) Air Masses • Air masses are large bodies of air that have the same properties as the area of the Earth’s surface over which it forms and moves. • For example, deserts produce hot dry air masses.
Fronts • The place where air masses meet is called a front. • Weather is caused by the way these air masses interact.
Cold Fronts • Incoming dense cold air pushes up warm air • This forms a narrow band of violent storms
Warm Fronts • Warm air slides over departing cool air. • This forms feathery clouds.
Stationary Front • A cool air mass and a warm air masses meet and stop moving (neither one advances). • This causes a few days of rainy and windy weather.
Review Questions • What cloud type can become tornadoes? • Cumulonimbus (same as thunderstorms) • Where do hurricanes form? • Over water • Describe how a cold front is represented on a weather map? • Blue line with triangles
Review Questions • What is the difference between rotation and revolution? • Rotation is spinning and revolution is going around or orbiting • What causes tides? • Pull of the moon • What side of the moon is lit during a waxing crescent? • Right
Review Questions • What happened to Pluto? • Pluto was declassified to a dwarf planet • Which planets are the gas giants? • Jupiter, Saturn, Uranus and Neptune • Which planets are the terrestrial planets? • Mercury, Venus, Earth and Mars
Review Question • What states belong to the Chesapeake Bay watershed? • PA, VA, WV, DE, NY, MD and DC • What are the 3 places water in VA will eventually go? • Chesapeake Bay, Gulf of Mexico and North Carolina Sound • What is the name of or local watershed? • Potomac