Presentation on theme: "Astronomy Sun, moon, tides Characteristics of the moon w Spherical; made of rock w Has no atmosphere, no water, and no living things w Drastic temperature."— Presentation transcript:
Astronomy Sun, moon, tides
Characteristics of the moon w Spherical; made of rock w Has no atmosphere, no water, and no living things w Drastic temperature changes w Earths natural satellite
Moon and its effects w One- fourth of the Earths diameter w revolves around the earth every 29 1/2 days w the gravity of the moon controls the tides (trans.)
Questions w What are three characteristics of the moon?
Types of tides (show trans.) w Spring tides- gravity of the sun and moon work together (tide is high) w Neap tides- gravity of the sun and moon PULL against each other (tide is low)
Phases of the moon w New moon w Crescent w First quarter w Gibbous w Full moon w Gibbous w Third Quarter w Crescent w New moon
Questions w What is the difference between a spring tide and a neap tide?
Eclipses (show trans.) w Solar eclipse- sunlight is blocked by the moon w lunar eclipse- Earth is between the sun and moon w moon is visible because of reflected sunlight
Questions w Why do we see the moon at certain times of the month? w How are solar eclipses different from lunar eclipses?
Characteristics of the sun (show trans.) w Made of plasma (high energy form of matter) w produces energy as a result of nuclear fusion w core temperature (15,000,000 ºC)
Sun w 150,000,000 kilometers from Earth w makes up 99% of the mass of the solar system
Questions w How does the sun produce energy? w What are three characteristics of the sun?