Light travels in straight lines at 300,000 km per second. White light is a mixture of seven colors and the shadow of an object is always on the opposite side of the light source. Objects can be transparent, translucent, or opaque depending on how much light they allow to pass through. Natural bodies like the sun produce their own light while artificial ones are man-made. Heat moves from hot to cold bodies and materials can conduct or insulate heat transfer.

1. By: Berta Celdrán
Puche

2. We need light to see
•Light moves in •Light moves very
a straight line. fast.

3. The shadow of an object is always formed on the
opposite side to the source of light.
The light we get from the Sun is called white light.
We can also see them in a rainbow.
We can make all the colours from just three colours: blue,
red and yellow. These are the primary colours.
Light travels at 300.000 km per second.
White light is a mixture
of seven colours: red,
orange, yellow, green,
blue, indigo and violet.

4. Transparent Translucent Opaque
objects objects objects
Like clear glass Allow some For example
bottles allow light to pass wood and
light to pass through. cardboard, do
through. not allow light
to pass
through.

5. Natural luminous bodies , like
the Sun, produce light.
Produce no light.
Artificial luminous bodies, like
candles and matches, are man-
made.

6. Heat goes from one Heat goes from hot
body to another. bodies to colder
bodies.

7. Conductors Insulators
Material like iron, aluminium and Materials like wood and plastic.
glass. They get hot and cold slowly.
They get hot and cold quickly.