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Space Science. Chapter 2 Notes. Bell Work 1/26/11. Write each statement. Then decide if the statement is true or false. If false, then correct it. The sky seems to turn because Earth stays still. Mass is the force that keeps a satellite in orbit around an object in space.
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Space Science Chapter 2 Notes
Bell Work 1/26/11 Write each statement. Then decide if the statement is true or false. If false, then correct it. • The sky seems to turn because Earth stays still. • Mass is the force that keeps a satellite in orbit around an object in space. • Earth is a satellite of the Sun.
Earth’s rotation causes day and night • Gravity pulls objects toward the center of the Earth • As Earth turns so do you • You keep the same position on Earth • The view above your head changes • The directions north, south, east, and west are based on the way the planet turns • At any one time, half of Earth is in sunlight
Earth’s tilted axis and orbit cause seasons • Revolution – the motion of one body around another or the time it takes an object to go around once • Example – Earth in its orbit around the Sun • As Earth moves, its axis always points in the same direction in space • It takes Earth 1 year or 364.25 days to make one revolution around the Sun
Seasonal Patterns • Seasons – patterns of temperature changes and other weather trends over the course of a year • Seasons occur because the amount of sunlight at each location changes during the year • Equinox – sunlight shines equally on the northern and southern hemispheres • Solstice – the area of sunlight is a maximum in one hemisphere and a minimum in the other hemisphere
Seasonal Patterns • September Equinox – half of the sunlight is in each hemisphere. The strongest sunlight in on the equator • December Solstice – Less than half of the Northern Hemisphere is in sunlight. The strongest sunlight is south of the equator, so the Southern Hemisphere grows warmer.
March Equinox – half of the sunlight is in each hemisphere. The strongest sunlight is on the equator. • June Solstice – more than half of the Northern Hemisphere is in sunlight. The strongest sunlight is north of the equator, so the Northern Hemisphere grows warmer.
Bell Work 1/26/10 Please answer #1-3 on page 49 of your book on your bell work sheet.
Bell Work 1/28/11 Decide if it is True/False – correct if it is False • The imaginary line running from North Pole to South Pole through the center of Earth is called the axis of rotation. • One complete revolution of Earth moving around the Sun takes one month. • Seasons are patterns of temperature and weather changes through the course of a year. • At an equinox, the area of Earth lit by sunlight is at a maximum in one hemisphere and at a minimum in the other hemisphere.
Bell Work 1/31/11 Decide if it is True/False – correct if it is False • In the Northern Hemisphere, spring begins on the September equinox. • Many parts of Earth experience seasons because the angle of sunlight shining on that part of Earth changes throughout the year. • The part of Earth that faces the Sun changes as Earth rotates on its axis, which is why Earth has summer and winter. • Sunlight shines equally on the northern and southern hemispheres at an equinox.
Bell Work 2/7/11 Define each word • Revolution • Axis of rotation • Season
Dark-colored maria formed from lava-filled craters. Light-colored highlands are old and cratered. 20.2 The Moon is Earth’s natural satellite. The Moon’s near side always faces Earth.
crust mantle core 20.2 The Moon is Earth’s natural satellite. The Moon’s near side always faces Earth. The Moon has layers.
Bell Work 2/8/11 • What are the dark spots on the moon called? How were they made? • What are the light spots on the moon called? • List the three layers of the moon.
Bell Work 2/3/10 Please begin working on your moon research WITHOUT talking
Bell Work 2/8/10 • Answer #4-6 on page 57 on your bell work sheet
Moon Earth 20.3 Positions of the Sun and Moon affect Earth. Lunar phases are different views of the Moon’s sunlit half.
Bell Work 2/9/11 Answer #1-3 on page 57 on your bell work sheet.
low tide High tide rotation of Earth Moon 20.3 Positions of the Sun and Moon affect Earth. The Moon’s gravity causes tides as Earth turns.
penumbra umbra 20.3 Positions of the Sun and Moon affect Earth. Shadows cause eclipses.
Bell Work Complete on the green sheet from last week, on Wednesday Pg 69 #7-16 write the answers only
Please get your name and id from the counter by the sinks. If you are at a computer seat please get logged onto the computer and open the Space Ch. 2 Test. If you want to have the test read to you then you do not need to get and id and login sheet and you do not need to log onto the computer.
Bell Work Write 3 sentences about what you learned on the Space Bus.
Bell Work 2/14/11 Draw and label the 8 phases of the moon.
Bell Work 2/15/11 • What makes the Moon wax and wane? • Why do tides on Earth occur? • What happens during a total solar eclipse?
Bell Work 1/16/11 • What word describes the Moon when less than half of its Earth-facing side is in sunlight? • Why does the Moon appear to change shape gradually from week to week? • Sydney, Australia, is in the Southern Hemisphere. What type of weather does Sydney experience around December 21? • At noon on the day of the summer solstice, the Sun is • During the first week of the phases of the Moon, the Moon is
Bell Work 2/17/11 • Where do the lengths of daylight change the most over the year? • Why does a person on Earth always see the same side of the Moon? • The lunar highlands have many round features called • When is the Sun highest in the sky near the North Pole? • What makes up most of the Moon's volume and is made of dense rock?
