Chapter 20 less 2 A) DESCRIBE THE CURRENT THEROY FOR THE ORIGIN OF THE EARTH’S MOON 1. mercury does not have a moon 2. The moon formed from a collision between another body and the Earth is the most
currenttheory for the formation of Earth’s moon
3. the moon is too far away from the Earth to completely hide the sun which is the reason
why a Annular solar eclipses happen
4. the moon is less dense because the Earth's moon has a lower percentage of heavy
elements than the Earth does.
5. The composition of the Earth's mantle is similar to that of Earth's moon 6. Maria are the moon's lava plains 7. The moon is a naturally formed planetary satellite 8. Galileo discovered The four largest moons of Jupiter 9. Triton and Titan are 2 moons with atmosphere
B) DESCRIBE WHAT CAUSES THE PHASES OF THE EARTH’S MOON 1. The moon is best describes because -we always see the same side of the moon from earth -the moon’s period of rotation and period of revolution are identical -The relative positions of the moon, sun, and Earth determine which phase the moon is in. 2. As Earth's moon waxes, the sunlit fraction we see from Earth becomes larger 3. When the moon is waning, the sunlit fraction is becoming smaller 4. If you lived on the far side of the moon, you would never see the Earth 5. The different appearances of the moon due to its changing position are called phases 6. When you see the sunlit fraction from earth getting larger it is a waxing moon. C C) EXPLAIN THE DIFFERENCE BETWEEN A SOLAR ECLIPSE AND A LUNAR ECLIPSE 1. Annular eclipses happen when the moon is farthest from The earth 2. true statements about eclipses -- during an annular eclipse the solar corona is visible -- Annular eclipses occur because the moon's orbit is not completely circular. -- A solar eclipse can be viewed from only a few locations on Earth. 3. the moon can look red. during a lunar eclipse 4. when the shadow of one celestial body falls on another an eclipse happens 5. when the Earth comes between the sun and the moon, and the shadow of the Earth falls
on the moon. A lunar eclipse happen
6. when the moon comes between the Earth and the sun, and the shadow of the moon falls
on the Earth a solar eclipse happens
CHAPTER 20 LESSON 3 A. EXPLAIN WHY COMETS, ASTEROIDS, AND METEOROIDS, ARE IMPORTANT TO THE STUDY OF THE SOLAR SYSTEM 1. true statements about comets --originate from the cold outer solar system --are probably leftovers from the process of planet formation --they may help scientists piece together the history of the solar system 2. A comets orbit is highly elliptical and a planet’s orbit is more circular and this is the difference between orbits of planets and comets. 3. A comet's ion tail always extends away from the sun B. COMPARE THE DIFFERENT TYPES OF ASTERIODS WITH THE DIFFERENT TYPES OF METEOROIDS. 1. Electrically charged particles of gas is what a comet’s ion tail consist of. 2. three major types of meteorites are stony, metallic, and stony-iron 3. Between Mars/Jupiter is where most asteroids in our solar system are found. 4. meteoroids that fall to earth are called meteorites C. DESCRIBE THE RISKS TO LIFE ON EARTH FROM COSMIC IMPACTS 1.. a terrestrial planet with no atmosphere are celestial bodies most likely to have
many craters
2. Objects smaller than 10 meters across usually burn up in the Earth's atmosphere and
do not pose a risk to Earth's surface.
3. Most lunar craters are the result of impacts from celestial objects.
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