Cycle B / Spring 2 / Science / Light / UKS2

Which of the following is a natural light source?

• A light bulb
• The sun
• A computer screen
• A campfire

Complete the sentence. Light always travels in …

• bendy lines

• diagonal lines

• wavy lines

• straight lines

How does reflection occur?

• Reflection occurs when waves change direction without hitting a surface
• Reflection occurs when waves are absorbed by a surface
• Reflection occurs when light bounces

  off any object and changes

  direction.

• Reflection occurs when waves pass through a surface

Which are the more reflective objects?

• Pale coloured or shiny objects

• Dark coloured or dull ones.

Light reflects off all objects.

• True

• False

When does light pollution occur?

• Light pollution occurs during the day when the sun is shining brightly
• Light pollution occurs only in rural areas with no artificial lights
• Light pollution occurs when too much

  artificial light is used.

• Light pollution occurs when there are no clouds in the sky

Light pollution positively affects

the environment.

• True

• False

Which of the statements is not true about shadows ?

• Shadows happen when light is blocked by

  an object.

• The higher the light source, the shorter

  the shadow.

• The closer the object is to the light source,

  the larger the shadow.

• The closer the object is to the light source,

  the smaller the shadow.

How does refraction occur?

• When light passes through a single medium without any change in speed or direction.

• When light

  changes speed and direction when

  it travels through transparent objects.

• When light passes through a vacuum and does not change its speed or direction.

• When light passes through a medium and changes its color but not its speed or direction.

Which famous scientist discovered that

white light is made up of different

colours?

• Mary Anning

• Charles Darwin

• Thomas Edison

• Sir Isaac Newton