Lunar and Planetary Institute






Comets - Standards

Make a Comet - Dry Ice Comet

Correlations to National Standards

Physical Science — Content Standard B

Motions and Forces

  • The motion of an object can be described by its position, direction of motion, and speed. That motion can be measured and represented on a graph.
  • An object that is not being subjected to a force will continue to move at a constant speed and in a straight line.
  • If more than one force acts on an object along a straight line, then the forces will reinforce or cancel one another, depending on their direction and magnitude. Unbalanced forces will cause changes in the speed or direction of an object's motion.

Transfer of Energy

  • Energy is a property of many substances and is associated with heat, light, electricity, mechanical motion, sound, nuclei, and the nature of a chemical. Energy is transferred in many ways.

Earth and Space Science — Content Standard D

Earth in the Solar System

  • The earth is the third planet from the sun in a system that includes the moon, the sun, eight other planets and their moons, and smaller objects, such as asteroids and comets.
  • Most objects in the solar system are in regular and predictable motion.
  • Gravity is the force that keeps planets in orbit around the sun and governs the rest of the motion in the solar system.

 

Last updated
May 27, 2009