P3 Unit 21 The Sun, the Earth and the Moon

P3 Unit 21 The Sun, the Earth and the Moon

Science textbook at page 110-117

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The Sun, Earth, and Moon - Solar System for Kids - YouTube

The sun provides light and heat

• The sun is our main source of light and heat on the Earth

• without light from the sun all living things would not be able to stay alive

• The amount of heat from the sun that reaches the earth is enough to keep earth warm and support life

The Sun and the Moon in space

• The sun and the moon are in the sky

• the sun and the moon in space. Space is a huge and dark area outside the earth

• the earth is a planet, , it moves around the sun

• The moon moves around the earth

Shape of the sun , the Earth and the moon

• The sun is shaped like a sphere , it is a huge, the sun is made up of hot gases

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Earth

• from where we are, on the surface of the earth , the earth appears flat

• However the earth is shaped like a sphere

• There are land and water on the earth

Moon

• The moon does not give off its own light

• it reflects light from the Sun

• From the earth , we see different shapes of the Moon on different days

Position of the sun

• the position of sun in the sky changes throughout the day

• When things are in the Sun, they from dark areas on the ground near them, these area are called shadows

• A shadow always falls on the opposite side of the sun

Long shadows in the morning

• The Sun rises and is low in the sky in the morning

• Things in the sun during the morning form long shadows

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Short shadows in the afternoon

• After the sun rises higher in the sky, the shadows get shorter

• When the sun is directly above us at noon , things in the sun form short shadows

Long shadows in the morning

• the sun starts to set in the evening

• it gets lower in the sky

• things in the evening sun form long shadows again

The cardinal points

• The cardinal points are the four main directions : North, South, West, East

• We usually see a compass rose on a map. A compass rose shows the four cardinal points. It is used on a map to locate directions

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• The sun rises in the East and sets in the west

• Scientist often make use of cardinal points to locate places on the Earth