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ACTIVITY 4: KEEP IT COLD
PREPARED BY: THE GROUP 4
WHAT IS RADIATION?
•The transfer of energy from
the sun across nearly empty
space is made possible by
it.
•All objects even ordinary
one gives off heat into
surroundings.
OTHER MEANINGS OF RADIATION:
•Energy that comes from a source in the form of
wave or rays you cannot see.
•A type of dangerous and powerful energy that
is produced by radioactive substances and
nuclear reactions.
•The combined processes of emission,
transmission, and absorption of radiant energy;
the transfer of heat by radiation.
NOTE:
ALL OBJECTS EMIT AND ABSORB RADIATION ALTHOUGH SOME OBJECTS ARE BETTER AT EMITTING OR ABSORBING RADIATION THAN OTHERS.
THE LABORATORY ACTIVITY
THE SITUATION:
One hot sunny day, Cobi and Mumble
walked into a tea shop and each asked for
an order of iced milk tea for takeout. The
crew told them as part of their promo their
costumers can choose the color of the
tumbler they want to use, pointing to the
array of containers made of the same
material but are of different colors and
Cobi favoured the container with
a dull black surface, saying that
the milk tea will stay cooler if it
is in a black container.
Mumble remarked that
the tea would stay even
cooler if it is in a
container with bright
shiny surface.
MATERIALS NEEDED FOR THE EXPERIMENT:
•Milk tea
•Laboratory thermometer
•Tumblers/Containers(Dull black
and Bright shiny)
PROCEDURES:1. First, prepare the containers.
2.Fill up the containers with the milk tea.
3.And put the containers on the area
where sunlight can strike through.
4.And put thermometers on both
containers.
5.And measure the temperature every 5
minutes.
TUMBLER A TUMBLER B
Cup
0min
5 min
10 min
15 min
20 min
Dull Black
Container
5 10 13 15 15
Bright Shiny
Contain5 8 12 13 14
Temperature ( ˚C)
CONCLUSION/GENERALIZATION:
We therefore conclude that,
the lighter the object the longer
that the longer that it can keep
the milk tea cold because a light
color doesn’t absorb much
radiation than black.
