Bellringer EXPLAIN IN COMPLETE SENTENCES WHAT IS THE SYSTEM MOON - EARTH.

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Presentation transcript:

Bellringer EXPLAIN IN COMPLETE SENTENCES WHAT IS THE SYSTEM MOON - EARTH

The Sun-Earth-Moon System Rotation Coriolis Effect Tides Revolution Seasons Moon Lunar Eclipse Solar Eclipse

Rotation Earth is a round, 3-dimensional sphere 23.5 ° Earth is a round, 3-dimensional sphere AXIS – imaginary vertical line around which earth spins 23.5 ° from vertical

Rotation ROTATION – the spinning of Earth around its axis

Rotation Effects of ROTATION Night and day – plants, animals, and people Daily change in temperature

Effects of ROTATION Earth bulges at the equator Polar diameter – 7900 miles (12,714 km) Equatorial diameter – 7927 miles (12,756 km)

Rotation How fast is the Earth spinning around its axis? At the equator, the Earth's surface moves 40,070 kilometers in 24 hours. That is a speed of about 1040 miles/hr (1670 km/hr or 0.5 km/sec). [This is calculated by dividing the circumference of the Earth at the equator (about 24,900 miles or 40,070 km) by the number of hours in a day (24).] As you move toward either pole, this speed decreases to almost zero (since the circumference of the spinning circle at the extreme latitudes approaches zero).

Rotation Effects of ROTATION CORIOLIS EFFECT Earth rotates at different speeds at different latitudes Any moving solid, liquid , or gas is turned to the RIGHT of its intended path in the Northern Hemisphere Any moving solid, liquid , or gas is turned to the LEFT of its intended path in the Southern Hemisphere Winds Ocean currents

Effects of ROTATION CORIOLIS EFFECT

Effects of ROTATION CORIOLIS EFFECT

Effects of ROTATION CORIOLIS EFFECT

Rotation Effects of ROTATION Tides The gravitational pull of the moon and the sun produces a rhythmic rise and fall of the oceans as the Earth rotates

Tides Effects of ROTATION Result of the gravitational attraction between the Earth, sun, and moon. As the moon rotates around the Earth, it pulls the water on the nearest side of the Earth outward into a bulge. A similar bulge on the opposite side of the Earth is caused by inertia - gravitational attraction of the moon is less water furthest away than on the Earth.

SPRING TIDE TIDES NEAP TIDE

TIDES SPRING TIDE During time of the new moon and full moon, the sun and moon are in a straight line Combined gravitational pull produces spring tides High tides are very high and low tides are very low.

TIDES NEAP TIDE When sun and moon are at right angles from the Earth, during the quarter phases of the moon Gravitational pull on the oceans is less A smaller difference between high and low tide

TIDES Nova Scotia's Hall's Harbour at high tide. The tides have a vertical difference, between high and low tide, of up to 14 metres (48 feet)! And at low tide just six hours later.

HOMEWORK DRAW THE DIAGRAMS OF THE SUN AND MOON LOCATION FOR YOUR OBSERVATIONS FOR THIS WEEK