EM-SCI 1

• How light from a source travels?

  Light from a source travels in a

  straight line called ray.
• These are materials that allow light to pass through them.

  Transparent materials
• These are materials that allow only a portion of light to pass through

  them.

  Translucent materials
• They are neither transparent nor opaque.


  Translucent materials
• These are materials that blocked the passage of light, and a shadow is formed.

  Opaque materials
• White light from the sun enters into

  a _____ ______

  glass prism
• -This is a colored band form when light passes through a prism.

  Spectrum
• It is a polished clear glass usually having triangular ends.


  Prism
• It is an ordinary light.

  White light
• It is the presence of all colors.

  White light
• Objects that have white color_____ all colors.


  reflect
• Objects that have black color ____ all colors.

  absorb
• It is the absence of all colors of white light.

  Black
• It is the concept that colors of objects depend on the objects reflected and the colors they absorb.

  Selective absorption
• ____ are formed when light cannot pass through the object.

  Shadows
• ____ ____ form shadows because they blocked the light

  Opaque objects
• It is a device for showing the time of the day, from the shadow cast on a plate by an object with a straight edge

  Sundial
• It is the bouncing of light when it strikes a surface

  Reflection
• It is the bending of light when it passes through some objects

  Refraction
• It is an invisible force.


  Magnetism
• It is something that attracts iron


  Magnet
• These are magnets that are mined from the earth.

  Natural magnets
• These are magnets that are made or manufactured by man.

  Artificial magnets
• These are common artificial magnets that keep their magnetism

  for a long time.

  Permanent magnets
• It is the continuos transfer of water throughout the environment

  Water Cycle
• It is the circular pathway in which water moves through the earth

  Water Cycle
• It collects, purifies and distributes the fixed supply of water of the earth.

  Water Cycle
• It is the process by which liquid changes into gas.

  Evaporation
• It is the movement of of water into the soil .

  Infiltration
• It is the downward flow of water through soil and rock formations to groundwater storage areas called aquifers.


  Percolation
• It is the process in which water evaporates from the leaves of plants.

  Transpiration
• These are body processes where animals use and need water

  Respiration/digestion
• They return this water to the ecosytem through their wastes.

  Animals
• When animals breathe, their lungs release water vapour to the atmosphere. This is called _____

  Respiration
• It is the process by which gas changes into liquid.

  condensation
• It is a cloud that forms near the ground.

  Fog
• It is the process wherein water falls back to earth as rain.

  Precipitation
• Rain that comes in all different forms, depending on the temperature of the atmosphere.

  Precipitation
• It is the down slope surface movement of water back to the sea to begin the water cycle again.

  Run-off
• It is water in its gas form

  Water vapor