Grade 5_LIght and Shadow_TEST

What are the three types of materials in relation to light?

• Transparent, Translucent, Opaque

• Solid, Liquid, Gas

• Metal, Wood, Plastic

• Hot, Warm, Cold

Answer explanation

The three types of materials in relation to light are Transparent, Translucent, Opaque.

What is the term for the emission of light by living organisms such as fireflies?

• Bioluminescence

• Phosphorescent

• Incandescence

• Fluorescence

Answer explanation

The term for the emission of light by living organisms such as fireflies is bioluminescence, making it the correct choice.

What are the features of a shadow?

• Bright area where light is blocked, Always the same size as the object, Cannot be seen in complete darkness, Always has a defined shape

• Bright area where light is blocked, Changes size with the object, Cannot be seen in complete darkness, Always has a fuzzy edge

• Dark area where light is blocked, Changes size with the object, Can be seen in complete darkness, Always has a fuzzy edge

• Dark area where light is blocked, Always the same size as the object, Can be seen in complete darkness, Always has a defined shape

Answer explanation

The correct features of a shadow are that it is a dark area where light is blocked, always the same size as the object, can be seen in complete darkness, and always has a defined shape.

What is the requirement to create a shadow?

• Source of light, Transparent object, Opaque object

• Source of sound, Translucent object, Opaque object

• Source of heat, Translucent object, Transparent object

• Source of light, Translucent object, Opaque object

Answer explanation

To create a shadow, a source of light is required along with a translucent object and an opaque object.

Which term refers to the ability of a material to allow light to pass through completely?

• Opaque

• Translucent

• Transparency

• Transparent

Answer explanation

The term 'Transparent' refers to the ability of a material to allow light to pass through completely.

What is the term for the ability of a material to allow some light to pass through, but not enough to see clearly through it?

• Transparency

• Transparent

• Translucent

• Opaque

Answer explanation

The term for the ability of a material to allow some light to pass through, but not enough to see clearly through it is called 'Translucent'.

Which term refers to the inability of a material to allow any light to pass through?

• Translucent

• Transparency

• Opaque

• Transparent

Answer explanation

The term 'opaque' refers to the inability of a material to allow any light to pass through.

What is the term for the emission of light by a substance without combustion or perceptible heat?

• Fluorescence

• Incandescence

• Phosphorescent

• Bioluminescence

Answer explanation

The term for the emission of light by a substance without combustion or perceptible heat is phosphorescent.

What is the term for the property of a material to emit light when exposed to radiation?

• Bioluminescence

• Fluorescence

• Phosphorescent

• Incandescence

Answer explanation

Fluorescence is the property of a material to emit light when exposed to radiation, making it the correct term for the given question.

What is the term for the property of a material to emit light over a long period after the removal of the excitation source?

• Phosphorescent

• Bioluminescence

• Fluorescence

• Incandescence

Answer explanation

The correct term for the property of a material to emit light over a long period after the removal of the excitation source is phosphorescent.