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Heat and Light.
 Heat is the amount
of thermal energy an
object has.
 is a form of energy
that travels through
air and space in
waves.
 Thermal energy always travels from a hotter
object to a colder one. In 3 different forms.
Radiation
Conduction Convection
 Thermal energy always travels from a hotter
object to a colder one. In 3 different forms.
Radiation
Thermal energy can b...
 Thermal energy always travels from a hotter
object to a colder one. In 3 different forms.
Radiation
Conduction.
Convecti...
 CONDUCTORS AND INSULATORS.
INSULATORSCONDUCTORS.
SOME
MATERIALS ARE
GOOD
CONDUCTORS
LIKE METAL.
A PAN
OTHER DONT
TRANSFE...
 CONDUCTORS AND INSULATORS.
INSULATORSCONDUCTORS.
 THERMAL ENERGY CAUSES CHANGES IN THE
STATE OF SOME MATERIALS.
MELTING
EVAPORATION
EXPANSION
CHEMICAL
CHANGES
 THERMAL ENERGY CAUSES CHANGES IN THE
STATE OF SOME MATERIALS.
MELTING.
WHEN A SOLID
TURNS INTO A
LIQUID.
MOLECULES
MOVE ...
 THERMAL ENERGY CAUSES CHANGES IN THE
STATE OF SOME MATERIALS.
 THERMAL ENERGY CAUSES CHANGES IN THE
STATE OF SOME MATERIALS.
EXPANSION.
THERMAL ENERGY
CAUSES THE
MOLECULES IN A
SOLID,...
EXPANSION. CHEMICAL
CHANGES.
Light is a radiation that we can see with our
eyes. It´s made up of microscopic particles
that travel in waves.
Objects re...
Objects reactions to light
REFLECTION
REFRACTION
OCCURS WHEN LIGHT
ENERGY BOUNCES OFF A
SURFACE AND CHANGES
DIRECTION
OCCURS WHEN LIGHT PASSES
TROUGH...
REFLECTION
REFRACTION
WHITE LIGHT
WHITE LIGHT IS MADE
UP OF ALL THE
COLOURS COMBINED
TOGETHER.
WE CAN DIVIDE IT BY
REFRACTION
WHITE LIGHT
When light energy hits an object,
some of this energy is absorbed by
the object.
This energy makes the molecules of
the ob...
What absorbs
more heat?
MAKE A
RAINBOW.
Time to experiment.
Light
bulbs.
Lightni
ng
bolt.
The
Sun
Natural science heat and light
Natural science heat and light
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Natural science heat and light

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Natural science heat and light

  1. 1. Heat and Light.
  2. 2.  Heat is the amount of thermal energy an object has.
  3. 3.  is a form of energy that travels through air and space in waves.
  4. 4.  Thermal energy always travels from a hotter object to a colder one. In 3 different forms. Radiation Conduction Convection
  5. 5.  Thermal energy always travels from a hotter object to a colder one. In 3 different forms. Radiation Thermal energy can be transferred by space through electromagnetic waves. Conduction. Occurs when 2 objects are in contact and thermal energy transferred from an object to the other . Convection. Occurs when thermal energy travel trough a gas or a liquid
  6. 6.  Thermal energy always travels from a hotter object to a colder one. In 3 different forms. Radiation Conduction. Convection.
  7. 7.  CONDUCTORS AND INSULATORS. INSULATORSCONDUCTORS. SOME MATERIALS ARE GOOD CONDUCTORS LIKE METAL. A PAN OTHER DONT TRANSFER ENERGY EASILY.WOOD
  8. 8.  CONDUCTORS AND INSULATORS. INSULATORSCONDUCTORS.
  9. 9.  THERMAL ENERGY CAUSES CHANGES IN THE STATE OF SOME MATERIALS. MELTING EVAPORATION EXPANSION CHEMICAL CHANGES
  10. 10.  THERMAL ENERGY CAUSES CHANGES IN THE STATE OF SOME MATERIALS. MELTING. WHEN A SOLID TURNS INTO A LIQUID. MOLECULES MOVE FASTER EVAPORATION. THERMAL ENERGY MAKES A LIQUID CHANGE INTO A GAS
  11. 11.  THERMAL ENERGY CAUSES CHANGES IN THE STATE OF SOME MATERIALS.
  12. 12.  THERMAL ENERGY CAUSES CHANGES IN THE STATE OF SOME MATERIALS. EXPANSION. THERMAL ENERGY CAUSES THE MOLECULES IN A SOLID, LIQUID OR GAS TO VIBRATE, AS A RESULT THE MATERIAL EXPANDS. CHEMICAL CHANGES. Thermal energy can cause chemical changes like when we make fairy cakes or an omelette.
  13. 13. EXPANSION. CHEMICAL CHANGES.
  14. 14. Light is a radiation that we can see with our eyes. It´s made up of microscopic particles that travel in waves. Objects reactions to light Transparent It doesn´t block light. Opaque It blocks the light completely. Translucient Some objects can block light, but some can pass trough the material.
  15. 15. Objects reactions to light
  16. 16. REFLECTION REFRACTION OCCURS WHEN LIGHT ENERGY BOUNCES OFF A SURFACE AND CHANGES DIRECTION OCCURS WHEN LIGHT PASSES TROUGH SOME TRANSPARENT SUBSTANCES LIKE WATER, AND LIGHT ENERGY CHANGES DIRECTION SLIGHTLY.
  17. 17. REFLECTION REFRACTION
  18. 18. WHITE LIGHT WHITE LIGHT IS MADE UP OF ALL THE COLOURS COMBINED TOGETHER. WE CAN DIVIDE IT BY REFRACTION
  19. 19. WHITE LIGHT
  20. 20. When light energy hits an object, some of this energy is absorbed by the object. This energy makes the molecules of the object vibrate faster . If we touch the object, we feel this vibration as heat.
  21. 21. What absorbs more heat? MAKE A RAINBOW. Time to experiment.
  22. 22. Light bulbs. Lightni ng bolt. The Sun

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