2
10
Say
The Earth’s layers
chant.
3
In your notebook, match the definitions to words on the pages.
a)
Person who studies space
d)
Semi-liquid rock
b)
Layer of gases around the Earth
e)
Outer layer of the geosphere
c)
Shape of the Earth
f)
All the water on the Earth
4
Draw a diagram of the Earth’s layers and label it.
5
11
Q
U
Z
I
Check your learning.
11
Astronomers
study the Sun, Moon, planets and other objects in space.
Discoveries
A C T I V I T I E S
People originally believed that the Earth was
flat
.
But in Ancient History, astronomers calculated
it was a
sphere
. They observed that the Earth’s
shadow was a sphere. They also observed how the
Earth’s curved shape made objects visible from
high places that weren’t visible from lower places.
At the start of the 17th century, the
telescope
was invented. Telescopes use
lenses
to help
us see objects that are far away. Astronomers
discovered planets such as
Uranus
and
Neptune
using telescopes. Today’s telescopes can see far
into space. Some are even located in space!
1
Read and find out:
a)
which planets were discovered using a telescope.
b)
when astronomers realised the Earth is a sphere.
R E A D & T H I N K
What do
astronomers
do?
