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Math Module 2
Common Sense on Digital Life
3. Water on Earth moves between the oceans and land through the processes of evaporation and condensation. As a basis for understanding this concept:
a. Students know most of Earth’s water is present as salt water in the oceans, which cover most of Earth’s surface.
b. Students know when liquid water evaporates, it turns into water vapor in the air and can reappear as a liquid when cooled or
as a solid if cooled below the freezing point of water.
c. Students know water vapor in the air moves from one place to another and can form fog or clouds, which are tiny droplets of
water or ice, and can fall to Earth as rain, hail, sleet, or snow.
e. Students know the origin of the water used by their local communities.
4. Energy from the Sun heats Earth unevenly, causing air movements that result in changing weather patterns. As a basis for understanding this concept:
a. Students know uneven heating of Earth causes air movements (convection currents).
b. Students know the influence that the ocean has on the weather and the role that the water cycle plays in weather patterns.
c. Students know the causes and effects of different types of severe weather.
d. Students know how to use weather maps and data to predict local weather and know that weather forecasts depend on many
e. Students know that the Earth’s atmosphere exerts a pressure that decreases with distance above Earth’s surface and that at
any point it exerts this pressure equally in all directions.
5.The solar system consists of planets and other bodies that orbit the Sun in predictable paths. As a basis for understanding this concept:
a. Students know the Sun, an average star, is the central and largest body in the solar system and is composed primarily of
hydrogen and helium.
b. Students know the solar system includes the planet Earth, the Moon, the Sun, eight other planets and their satellites, and
smaller objects, such as asteroids and comets.
c. Students know the path of a planet around the Sun is due to the gravitational attraction between the Sun and the planet.