Page 93 - Active Science 5 Ebook and Activity

Lunar eclipse occurs on a full moon day. However, it does not occur on every full moon
day. This is because the earth, the moon and the sun are not in a straight line on all full

moon days.

T he Moon and the Tides
High
Due to the gravitational pull of the moon, Tide
there is periodic rise and fall of the water Sun
level in large water bodies like seas and Moon

oceans these are called tides. High Earth
Tide
As the moon revolves around the earth,
the surface of the earth facing the moon
experiences the maximum gravitational Spring Tide or High Tide
pull. As the water rushes upwards on the

side facing the moon, the water level at the Moon
shores rises causing high or spring tides.
Low
At the same time, a high tide is also caused Tide
in the opposite direction. This is caused due Sun

to the combined effects of rotation of the
earth and gravitational pull of the moon on Earth
the earth.
Moon
Between the two high tides, ocean water
level falls causing low or neap tides. Neap Tide or Low Tide

Let’s Pronounce Together

·orbit core corona crust mantle core

LET’S
REVISE

• The solar system is named after ‘sol’, the name for the sun.
• Life is not possible on the moon.
• The moon is the earth’s closest neighbour.

• Lunar eclipse occurs on a full moon day.
• Solar eclipse occurs on a new moon day.
• The earth has three major layers called the crust, mantle and core.

• The sun is a huge ball of burning gases and is situated at the centre of the solar system.
• Hydrogen is burnt at the core of the sun.
• Sun makes up 98% mass of the solar system.

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