The solar system.
Vocabulary words
Grade 4 (A-B)
Solar system:
the sun, eight planets, their moons, dwarf
planets and all other smaller bodies that
revolve around the sun.
Planet:
A large round body that moves around
the sun in a regular path.
Natural satellite:
it’s a moon, round natural body that
moves around a planet in a definite path.
Star:
a very large natural body made up of
gas which burns all the time.
Orbit:
a definite path along which a planet or
moon moves.
Magma:
very hot molten rocks found in the
upper mantle of the Earth.
Lava:
the hot molten liquid that oozes out of
the mantle.
Axis:
the imaginary line about which the
Earth rotates.
Rotation:
the movement of the Earth around its
axis.
Revolution:
the movement of the Earth around the
sun in its orbit.
Open
the solar system booklet.
Do
worksheet -8 (you have double worksheet-8 in your
booklet, do them).
Do
worksheet- 9