Presentation on theme: "N. Sassaman – 2014 SAMS. Use the BrainPOP tile on your Surface start screen and search for the topics below:"— Presentation transcript:
N. Sassaman – 2014 SAMS
Use the BrainPOP tile on your Surface start screen and search for the topics below:
Pages in textbook
- Phases, Eclipses, and Tides Tides occur mainly due to the difference in the force of gravity between the moon and different parts of Earth. ;
- Phases, Eclipses, and Tides When Earth, the sun, and the moon are in a straight line, a spring tide occurs. When the moon is at a right angle to the sun, a neap tide occurs. Site 1: Site 2: Full and New moons First and Third quarter
1. A – New, B – Waxing Crescent, C – First quarter, D – Full, E – Waning Gibbous, F – Third quarter. 2. A and D – Spring Tide; C and F – Neap Tide 3. Neap 4. Eclipse 5. Penumbra 6. Tides 7. Umbra 8. Phase 9. Spring 10. Lunar (during a Full moon!!) 11. Solar (during a New moon!!) 12. Gravity
The following links are videos: Packet page 10; Textbook pages 27-29
- Phases, Eclipses, and Tides A solar eclipse occurs when the moon passes directly between Earth and the sun, blocking sunlight from parts of Earth. Site 1: _science/terc/content/visualizations/es 2505/es2505page01.cfm _science/terc/content/visualizations/es 2505/es2505page01.cfm Site 2: imer.html imer.html During which PHASE of the moon does a SOLAR eclipse occur?? NEW MOON During which PHASE of the moon does a SOLAR eclipse occur?? NEW MOON
- Phases, Eclipses, and Tides During a lunar eclipse, Earth blocks sunlight from reaching the moon. Site 1: ience/terc/content/visualizations/es2504/ es2504page01.cfm ience/terc/content/visualizations/es2504/ es2504page01.cfm Site 2: r.html r.html Site 3: (video) news/eclipse-video.html news/eclipse-video.html During which PHASE of the moon does a LUNAR eclipse occur?? FULL MOON During which PHASE of the moon does a LUNAR eclipse occur?? FULL MOON
SOLAR LUNAR UMBRA – darkest part of the moon’s or Earth’s shadow = TOTAL ECLIPSE PENUMBRA – lighter part of the moon’s or Earth’s shadow = PARTIAL ECLIPSE
- Phases, Eclipses, and Tides The moon’s orbit is tilted about 5 degrees relative to Earth’s orbit around the sun. That is why we DO NOT have an eclipse EVERY full moon or new moon!!
Pages in textbook
- Phases, Eclipses, and Tides The changing relative positions of the moon, Earth, and sun cause the phases of the moon, eclipses, and tides.
- Phases, Eclipses, and Tides The phase of moon you see depends on how much of the sunlit side of the moon faces Earth. SUNLIGHT NEW WAXING CRESCENT WANNING CRESCENT WAXING GIBBOUS WANNING GIBBOUS FIRST QUARTER LAST QUARTER FULL What we see from Earth HALF of the moon is ALWAYS lit by the sun!!
- Phases, Eclipses, and Tides The phase of moon you see depends on how much of the sunlit side of the moon faces Earth.
Waxing – growing in size Waning – shrinking in size Gibbous – more than half but less than full Crescent – curved shape ending in points Full – entire sunlit side faces Earth New – sunlit side faces away from Earth Quarter – half the sunlight side faces Earth
A. Waxing crescent B. Full moon C. Third (last) quarter D. Waning crescent E. First quarter F. Waning gibbous G. Waxing gibbous H. New moon
The Moon’s Phases: mations/content/moonphase.html mations/content/moonphase.html Eclipses and Moon phases: art/moon_phases_and_eclipses/index.html art/moon_phases_and_eclipses/index.html Visualization from Earth and Space: /terc/content/visualizations/es2503/es2503pag e01.cfm /terc/content/visualizations/es2503/es2503pag e01.cfm Current Moon phase: Wonderville – Phases of the Moon: of-the-moon of-the-moon
p. 53 in textbook and p. 5-6 in packet (summary)
The strength of the force of gravity between two objects depends on two factors: the masses of the objects and the distance between them. - Gravity and Motion
Newton concluded that two factors–gravity and inertia– combine to keep the moon in orbit around Earth. - Gravity and Motion
What is gravity? Gravity is the force that attracts all objects toward one another. What is inertia? Inertia is the tendency of an object to resist a change in motion. Question Answer - Gravity and Motion
BrainPOP – Gravity BrainPOP – Newton’s laws of motion Why doesn’t the moon fall down? Gravity at Earth’s center: Use the BrainPOP app on Surface
Gravitational force between planets: animations.com/support-files/gravitasieplaneteb.swf animations.com/support-files/gravitasieplaneteb.swf Earth-Moon system: files/06aardemaan1.swf files/06aardemaan1.swf Sun-Earth-Moon system: files/07aardemaanson.swf files/07aardemaanson.swf Your weight on other planets!
1. The force of gravity on an object is known as its weight. 2. All objects in the universe are attracted to all other objects. The Earth and Moon are large objects and therefore have a large gravitational pull. 3. Once the ball is set into motion, it will continue to move at same speed and directions unless acted upon by an outside force (friction). 4. The greater the distance between objects the less the force of gravity.
5. A push or pull. 6. Force that attracts all objects to each other. 7. Every object in the universe attracts every other object. 8. The amount of matter in an object. 9. The force of gravity on an object (combined with the object’s mass). 10. The tendency of an object to resist a change in motion. 11. An object at rest will stay at rest and an object in motion will stay in motion with a constant speed and direction unless acted on by a force.
p in textbook
Use the following PowerPoint, along with your textbook, to take notes on p. 1 (Rotation vs. Revolution) and p. 3 (Seasons) of your packet. The PowerPoint contains many links to informational websites. Some of these have sound (like BrainPOP) and some are simply animations. Please investigate the websites fully as you take notes.
Earth moves through space in two major ways: rotation and revolution. (p. 15) - Earth in Space
Earth’s spinning on its axis. Axis – imaginary line that passes through Earth’s center and the N and S poles. One rotation is just under 24 hrs. Rotation causes day and night on Earth.
The movement of one object around another. Orbit – the Earth’s path as it revolves around the Sun. One revolution is days. Earth revolving around the Sun causes seasons. Site 1: Video 1: https://www.youtube.com/watch?v=k-oLJxjCzBg https://www.youtube.com/watch?v=k-oLJxjCzBg
Near the equator, sunlight strikes Earth’s surface more directly and is less spread out than near the poles. (p. 18) - Earth in Space North Pole Arctic Circle Tropic of Cancer Equator Tropic of Capricorn Antarctic Circle South Pole
Earth has seasons because it is tilted on its axis as it revolves around the sun. (p ) - Earth in Space Site 1: /science/geoanimations/ani mations/01_EarthSun_E2.ht ml Site 2: (sound) org/asset/ess05_int_seasons game/ Site 3: (sound) ience/earthsystem/solsticea ndequinox/ Username: password: seals Site 4: org/asset/ess05_int_seawifs /
The height of the sun above the horizon varies with the season. - Earth in Space
Please complete p. 4 in your packet ‘Earth in Space’ as a review of this material. Thanks!! On the following pages are a review of the notes from p. 3 and answer key to p. 4
Caused by: ◦ The TILT of the Earth ◦ The REVOLUTION of the Earth around the Sun. When it is one season in the Northern Hemisphere, it is the ‘opposite’ season in the Southern Hemisphere. ◦ Summer – Winter ◦ Fall - Spring
The Northern Hemisphere is tilted TOWARD the Sun; Southern Hemisphere is tilted AWAY (winter for them!!) The Sun’s rays are directly over the Tropic of Cancer (23.5⁰N latitude). Longer days and shorter nights for us in N. Hemisphere Artic Circle (North pole) has 24 hrs. of daylight; Antarctic Circle (South pole) has 24 hrs. of darkness.
The Northern Hemisphere is tilted AWAY from the Sun; Southern Hemisphere is tilted TOWARD (summer for them!!). The Sun’s rays are directly over the Tropic of Capricorn (23.5⁰S latitude). Shorter days and longer nights for us in N. Hemisphere Artic Circle (North pole) has 24 hrs. of darkness; Antarctic Circle (South pole) has 24 hrs. of daylight.
Equinox – mean ‘equal night’ Both N. and S. Hemispheres receive same amount of the Sun’s energy! (neutral ‘tilt’ of Earth in relation to Sun) The Sun’s rays are directly over the Equator (0⁰ latitude) There are 12 hrs. of daylight and 12 hrs. of darkness in both Hemispheres.
1. Winter 2. A – overhead; B – low in sky (horizon); C – no Sun (dark) 3. Sunset – Earth rotates counterclockwise 1. d 2. c 3. g 4. f 5. a 6. b 7. h 8. e