ALEX Classroom Resources

   View Standards     Standard(s): [SC2015] ES6 (6) 1 :

1 ) Create and manipulate models (e.g., physical, graphical, conceptual) to explain the occurrences of day/night cycles, length of year, seasons, tides, eclipses, and lunar phases based on patterns of the observed motions of celestial bodies.

[SC2015] PS8 (8) 12 :

12 ) Construct an argument from evidence explaining that fields exist between objects exerting forces on each other (e.g., interactions of magnets, electrically charged strips of tape, electrically charged pith balls, gravitational pull of the moon creating tides) even when the objects are not in contact.

Tides are the rise and fall of the Earth’s seas and oceans, and they are caused by the pull of gravity from the sun and moon. Tides cause changes in the depths of the water, meaning that seas and oceans are continually experiencing cycles of high and low tides.

The classroom resource provides a video that will describe how tides are created by the gravitational pull of the moon on Earth's oceans. There is also a short test that can be used to assess students' understanding.

   View Standards     Standard(s): [ELA2015] (8) 19 :

19 ) By the end of the year, read and comprehend literary nonfiction at the high end of the Grades 6-8 text complexity band independently and proficiently. [RI.8.10]

[SC2015] PS8 (8) 12 :

12 ) Construct an argument from evidence explaining that fields exist between objects exerting forces on each other (e.g., interactions of magnets, electrically charged strips of tape, electrically charged pith balls, gravitational pull of the moon creating tides) even when the objects are not in contact.

The teacher will present an informational text from the website, ReadWorks. Students will interact with this non-fiction text by annotating the text digitally. This article will explain how the moon creates tides on Earth by exerting the force of gravity on Earth's oceans, even though the two celestial objects are not in contact. Students could use this informational material to construct their own argument explaining how fields exist between objects exerting forces on each other.