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layer

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Your score was: 100 %

Question Results

Score 3 of 3

Question:

Multiple choice question

Layer means a thin cover, or one of many levels that lie one on top of the other.

Layer can be used as a noun or a verb. In this exercise it is used as a noun.

For example:

Candies can be covered with a layer of chocolate.

In very cold weather, a layer of ice covers lakes and rivers.


	all the parts together
	a covering
	a single level
	something that lies over or under something else

Which answers below are closest in meaning to layer? Choose the 3 correct answers.

Response:

	all the parts together
	a covering
	something that lies over or under something else
	a single level

Score 3 of 3

Question:

Multiple choice question

The examples below illustrate the meaning of layer.


	picture 4 - a type of cake
	picture 2 - the trunk of a tree
	picture 1 - water
	picture 3 - our skin

Which pictures are examples of something that has layers? Choose the 3 correct answers.

Response:

	picture 3 - our skin
	picture 1 - water
	picture 2 - the trunk of a tree
	picture 4 - a type of cake

Score 3 of 3

Question:

Multiple choice question


	can be thin or thick.
	covers something else.
	lies above or below something else.
	cuts through many levels.

Which answers below best complete this sentence? Choose the 3 correct answers.

A layer is something that...

Response:

	can be thin or thick.
	cuts through many levels.
	covers something else.
	lies above or below something else.

Score 2 of 2

Question:

Multiple choice question

Read this paragraph and answer the question below.


	The ozone layer protects us from the sun.
	If we want to protect our planet, we need to restrict products that harm the ozone layer.
	The ozone layer is a layer of the sun.

The Ozone Layer

The ozone layer keeps us safe by absorbing ultraviolet rays of the sun, almost like a layer of warm clothes protects us from the cold or a layer of sunscreen that protects our skin from the sun. Chlorofluorocarbons - commonly known as CFC gases - cause damage to the ozone layer and increase our exposure to ultraviolet rays which may cause cancer and cataracts. CFC gases are used for products such as styrofoam, spray-can propellants, some types of refrigerators and many more.

For more about the ozone layer, go to: http://science.howstuffworks.com

Which statements are TRUE according to the paragraph? Choose the 2 correct answers.

Response:

	The ozone layer is a layer of the sun.
	If we want to protect our planet, we need to restrict products that harm the ozone layer.
	The ozone layer protects us from the sun.