Science 3rd, unit 4

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Science 3rd, UNIT 4

El Tomillar, J.C. Brazo

Nov-13

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Science 3rd, UNIT 4

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Science 3rd, UNIT 4

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Science 3rd, UNIT 4

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The MILKY WAY is our galaxy

The Solar System is only a small part of the Milky Way

El Tomillar, J.C. Brazo

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Science 3rd, UNIT 4

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There are three different types of galaxies

ELLIPTICAL GALAXY

They have got elliptical form

They have got spiral form

IRREGULAR GALAXY El Tomillar, J.C. Brazo

SPIRAL GALAXY

They have got no fixed shape 6


Science 3rd, UNIT 4

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The SOLAR SYSTEM is made up of:

:

SATELLITES:

COMETS

REMEMBER: The Sun is the only star in the Solar System, but just one of the billion of stars in the Milky Way... El Tomillar, J.C. Brazo

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Science 3rd, UNIT 4

STARS

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Self-luminous celestial bodies. They are made up mainly of gas.

The Sun is a star

They release lots of energy.

El Tomillar, J.C. Brazo

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Science 3rd, UNIT 4

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PLANETS Large celestial bodies that move around a star

The Solar System has 8 planets

They don't have their own light El Tomillar, J.C. Brazo

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SATELLITES Celestial bodies that move around a planet

The Moon is the Earth's satellite. There are also other planets with satellites in the Solar System

They don't have their own light El Tomillar, J.C. Brazo

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Science 3rd, UNIT 4

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OTHER CELESTIAL BODIES ASTEROIDS Large rocks that move around a star

COMETS Large blocks of ice and rock that move around a star

El Tomillar, J.C. Brazo

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Science 3rd, UNIT 4

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MOVEMENTS OF THE EARTH ROTATION

AROUND ITS AXIS

REVOLUTION

AROUND THE SUN

It takes 24 hours and

It takes aprox. 365 days

causes DAYS and NIGHTS

and causes SEASONS (winter, spring, summer and autumn)

El Tomillar, J.C. Brazo

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Sun

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only natural satellite.

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MOON PHASES as we see them from the Earth

El Tomillar, J.C. Brazo

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Earth or part of it

El Tomillar, J.C. Brazo

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