Rotation and Revolution

Rotation is the movement of the

earth on it axis over a 24 hour

period.

Rotation

• Revolution is the movement of the earth and other planets around the sun. It takes

the earth 365 ¼ days to complete a full revolution.

Revolution

Results of rotation

• Day and night

When the earth rotates one part of

the earth faces the sun and the other

part is away from the sun. The part

that faces the sun experiences day

light and the part that is away from

the sun experiences night.

• High and low tides

This occurs when the earth spins

and the sun and the moon pulls it.

One force is usually stronger that

the other resulting in high and low

tides.

Wind speed and direction

There are north, south, east and west

directions, wind from the earth comes from

each direction. As the earth rotates different

places will get stronger wind as a result of the

speed.

Results of revolution

Seasons The Earth's seasons are not caused by the differences in the distance from the Sun throughout the year (these differences are extremely small). The seasons are the result of the tilt of the Earth's axis.

The Earth's axis is tilted from perpendicular to the plane of the ecliptic by 23.45°. This tilting is what gives us the four seasons of the year - spring, summer, autumn (fall) and winter. Since the axis is tilted, different parts of the globe are oriented towards the Sun at different times of the year.

Summer is warmer than winter (in each hemisphere) because the Sun's rays hit the Earth at a more direct angle during summer than during winter and also because the days are much longer than the nights during the summer. During the winter, the Sun's rays hit the Earth at an extreme angle, and the days are very short. These effects are due to the tilt of the Earth's axis.

The universe

The universe is all of space time and everything that exists therein, including all planets, stars, galaxies, the contents of intergalactic space, the smallest subatomic particles and all matter and energy

The solar system

Let’s talk about the planet that we live on: Earth!!

The earth is the third planet from the sun.

earth is the most dense planet it is also the

largest of he four inner planets sometimes

referred to as the blue planet.

It is a rotating sphere it is made of nitrogen,

oxygen and carbon. Earth has two major

forces:

Gravity and magnetism (magnetic field).

Earth has 71% water and 29% gas.

The inner and outer planets

The inner planets are: Mercury, Venus, Earth and

Mars they are referred to as the terrestrials.

The outer planets: Jupiter, Saturn, Uranus and

Neptune.

The inner planets are rocky and the outer planets

are gaseous they contain gasses such as iron,

nickel and carbon.

Differences between the inner and the outer planets.

•The inner planets are smaller than the outer planets.

•The inner planets has solid surfaces while the outer

planets are balls of gasses with no surface.

•The inner planets has greater density while the outer

planets density is very low.

•The inner planets has no ring while the outer planets

has.

•The inner planets spins slowly compare to the outer

planets, the outer planets spins swiftly.

The similarities of the inner and the outer planets

• Both the inner and the outer planets revolves

around the sun

•They all have moons

•The inner planet and the outer planet orbits on the

same plane.

•They have the same shape. (spherical)

Revolve-

Rotates- turn around axis: to turn like a wheel an axis or a fixed point, or make something turn around an axis or a fixed.

Planet - object in orbit round star: an astronomical object that orbits a star and does not shine with its own light, especially one of those orbiting the Sun in the solar.

Orbit

path of planet, satellite, or moon: the path that an astronomical object such as a planet, moon, or satellite follows around a larger astronomical object such as the sun

.

Spherical round- shaped like a sphere.

Sphere- globe: an object similar in shape to a

ball

Gaseous- resembling gas: neither solid nor

liquid and with a tendency to expand infinitely,

as does air.

Density- how full area is: the concentration

of people or things within an area in relation to

its size.

Tides-

Axis- an imaginary straight line around which

an object such as Earth rotates

Inner- near or closer to centre: located near

or closer to the centre of something.

Outer- on outside: on or around the outside

of something.

move in circular fashion: to move in a circular

movement either around an object or on a central

axis.

rise and fall of sea: the cyclic rise and fall of

the sea or another body of water produced by

the attraction of the Moon and Sun,

Terms

The End!

Prepared By:

Monique Chambers

B.Ed year 4

Presented to:

Mrs. N. Williams