Introduce a topic; organize ideas, concepts, and information, using strategies such as definition, classification, comparison/contrast, and cause/effect; include formatting (e.g., headings), graphics (e.g., charts, tables), and multimedia when useful to aiding comprehension.
Select the topic: asteroid, meteoroid, or comet and create a science book about the topic. Include diagrams, charts, illustrations, subtitles, glossary, table of contents, etc. as necessary.
Organize, represent, and interpret data with up to three categories; ask and answer questions about the total number of data points, how many in each category, and how many more or less are in one category than in another.
Develop and use a model to describe the role of gravity in the motions within galaxies and the solar system.
Earth and its solar system are part of the Milky Way galaxy, which is only one of many galaxies in the universe. A solar system consists of a star and a collection of objects, including planets, their moons, and asteroids that are held in orbit around the star by its gravitational pull on them. The solar system appears to have formed from a disk of dust and gas, drawn together by gravity. Emphasis for the model is on gravity as the force that holds together the solar system and galaxies, and controls orbital motions within them. Evidences of models can be physical (such as computer visualizations of elliptical orbits) or conceptual (such as mathematical proportions relative to the size of familiar objects such as students' school or state.)
Analyze and interpret data to determine scale properties of objects in the solar system.
Emphasis is on the analysis of data from Earth-based instruments, space-based telescopes, and spacecraft to determine similarities and differences among solar system objects. Examples of scale properties include the sizes of an object's layers, surface features, and orbital radius. Examples of data include statistical information, drawings and photographs, and models.
Construct and present arguments using evidence to support the claim that gravitational interactions are attractive and depend on the masses of interacting objects.
Gravitational forces are always attractive. There is a gravitational force between any two masses, but it is very small except when one or both of the objects have large mass (such as planet and its star.) Examples of evidence for arguments could include data generated from simulations or digital tools; and charts displaying mass, strength of interaction, distance from the Sun, and orbital periods of objects within the solar system.