Describe the motion of the spinning top EARTHS

Describe the motion of the spinning top

EARTH’S MOTION IN SPACE • Gravity governs motion on all objects in our Solar System and in the Universe • Sun-Earth-Moon System (elliptical orbits)

Earth’s Daily Cycles • Earth spins in space on its axis • This imaginary line extends from pole to pole • The axis is tilted at 23. 5º (gives Earth seasons)

Earth’s Daily Cycles • The act of spinning is called a rotation • 1 rotation = 24 hours (gives Earth day and night) • Earth rotates from west to east

Precession: Change in the direction of the axis without any change in tilt • Takes 25, 800 years to complete one cycle • Precession means that our “north star” will change

Nutation: The wobble of a spinning body

Earth’s Yearly Cycles Revolution • Earth revolves around the sun = 1 year, change of seasons

Earth’s Yearly Cycles • Seasons are caused by: 1. Earth’s tilt 2. Earth’s orbit around the sun

1. Seasons – Earth’s tilt • Because of Earth’s tilt, some areas get more direct sunlight than others (equator)

2. Seasons – Earth’s Orbit • Earth’s orbit causes different distances between the Earth and the sun https: //www. youtube. com/watch? v=fx. QVE 3 uq. Sq. E 0. 0167

2. Seasons – Earth’s Orbit • As Earth orbits the Sun, the tilt of Earth will determine which locations receive the highest amount of Solar Radiation • “Equinoxes and Solstices”

• The tilt of Earth and motion around 2. Seasons – Earth’s Orbit the Sun also changes the Sun’s altitude in the sky

Tides The gravitational forces of the Sun and the Moon cause the Earth’s oceans to rise and fall. Causes daily high and low tides, and monthly tides

Tides The moon’s orbit around Earth causes a shift in water on both the near and far sides of Earth

Tides The oceans that are on the side of the Earth facing the moon are pulled towards to moon, causing high tide

Spring Tides** Sun, Earth, and Moon are aligned **on average 3 x higher than Neap tides. Neap Tides Sun and Moon are perpendicular

Bay of Fundy Activity With a partner, read the “Bay of Fundy Tides” and watch the 2 videos from the article on Symbaloo. When you are done reading, go to Study Island click on the “Bay of Fundy Tides: The Highest Tides in the World!” assignment. Follow the instructions on Study Island submit your assignment by