Concepts for Earth Science on Space

Concepts for Space

Primary	Intermediate	Middle
Clouds, birds, and airplanes all have properties, locations, and movements that can be observed and described. There are more stars in the sky than can be easily counted. They are not scattered evenly and are not the same brightness or color. The sun can be seen only in the day time. The moon can be seen sometimes at day and sometimes at night. The sun, moon, and stars all appear to move in the sky. The moon looks a little different every day and the same again about every four weeks.	Objects in the sky have patterns of movement. The sun, for example, appears to move across the sky in the same way every day, but its path changes slowly over the seasons. The moon moves across the sky on a daily basis much like the sun. The observable shape of the moon changes from day to day in a cycle that lasts about a month. Seasons result from variations in the amount of the sun's energy hitting the surface, due to the tilt of the earth's rotation on its axis and the length of the day. The stars form patterns in the sky that stay the same, although they appear to move across the sky nightly, and different stars can be seen in different seasons. Telescopes are use to study the objects in the sky. Planets change their positions relative to the stars. The sun is a star. TheEearth is a planet that orbits the sun, and the moon orbits the Earth.	Most objects in the solar system are in regular and predictable motion. Those motions explain such phenomena as the day, the year, phases of the moon, and eclipses. We live on a relatively small planet that is the third from the sun. The Earth is mostly rock with three-fourths of it covered by water and the entire planet surrounded by air. Eight other planets of different size, compositions and conditions from Earth orbit the sun and do not appear to be able to support life. The planets have genearl patterns that relate to their size, orbits, number of moons, and distance from the sun. Everything on or anywhere near the Earth is pulled toward the Earth's center by gravitaional force. Large chunks of rocks orbit the sun in different orbits. Some will glow and disintegrate from friction as they move through the atmosphere or sometimes impact the surface. Others mixed with ice will be heated by the sun's energy and boil off frozen material from their surface and push it into a long illuminated tail.
Earth is a planet.	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. The sun, an average star, is the central and largest body in the solar system.	There are relationships between the objects in the solar system.
Gravity pulls objects toward the Earth.	Gravity alone holds us to the earth’s surface, and explains the phenomena of the tides.	Gravity is the force that keeps planets in orbit around the sun and governs the rest of the motion in the solar system.
	The sun provides light and heat necessary to maintain the temperature of the earth.	The sun is the major source of energy for phenomena on the earth’s surface, such as growth of plants, winds, weather, ocean currents, and the water cycle.

Created by Robert D. Sweetland Ed. D.