Impact Craters: Holes in the Ground
 Grade Level Grades K-4 Grades 5-8 Grades 9-12 Solar System Body Our Solar System Sun Mercury Venus Earth Earth's Moon Mars Asteroids Meteors & Meteorites Jupiter Europa Saturn Uranus Neptune Dwarf Planets Comets Kuiper Belt & Oort Cloud Mission Apollo Program ARTEMIS Cassini Chandrayaan-1 Dawn Deep Impact (EPOXI) Deep Space Network Earth Science Missions Galileo Genesis GRAIL Hayabusa Heliophysics Missions Hubble Space Telescope Human Spaceflight Huygens IBEX InSight Juno LCROSS Lunar Reconnaissance Orbiter Mars Exploration Rovers Mars Express Mars Global Surveyor Mars Pathfinder/Sojourner Mars Reconnaissance Orbiter Mars Science Laboratory/Curiosity MESSENGER NEAR Shoemaker New Horizons Phoenix SMART-1 SOHO Stardust Venus Express Viking 01 Viking 02 Voyager 1 Voyager 2 Topic Atmospheres and Weather Communication Comparing Solar System Objects Designing Spacecraft Gravity Landforms Language Arts and Science Life Light and Spectra Magnetism Math Modeling Solar System Objects Motions: Orbits, Phases, and Seasons Planetary Surface Processes Planets Beyond our Solar System Science as a Human Endeavor Size and Scale Solar System Exploration Solar System Formation Water in the Solar System
 Impact Craters: Holes in the Ground Download This Lesson (PDF, 274 KB) Grade Level: 5-8, 9-12 Body: Our Solar System Mission: Dawn (Dwarf Planets) Science Education Standards: Earth and Space Science -- Content Standard D Motions and Forces Objects change their motion only when a net force is applied. Laws of motion are used to calculate precisely the effects of forces on the motion of objects. The magnitude of the change in motion can be calculated using the relationship F = ma, which is independent of the nature of the force. Whenever one object exerts force on another, a force equal in magnitude and opposite in direction is exerted on the first object. Gravitation is a universal force that each mass exerts on any other mass. The strength of the gravitational attractive force between two masses is proportional to the masses and inversely proportional to the square of the distance between them. Short Description: Participants model and examine the impact cratering process. Source: Exploring Meteorite Mysteries