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Your score was: 82 %

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.

a covering

a single level

all the parts together

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

a single level

something that lies over or under something else
Score 3 of 3

Question:

Multiple choice question

The examples below illustrate the meaning of layer.

picture 3 - our skin

picture 1 - water

picture 2 - the trunk of a tree

picture 4 - a type of cake

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

Response:

picture 4 - a type of cake

picture 1 - water

picture 2 - the trunk of a tree

picture 3 - our skin
Score 1 of 3

Question:

Multiple choice question

can be thin or thick.

lies above or below something else.

cuts through many levels.

covers something else.

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

 

A layer is something that...

Response:

lies above or below something else.

cuts through many levels.
Feedback:

A layer is a covering of something on top or underneath the surface of something else. If something cuts through many levels, then it goes through many levels or layers - it is not a layer.

covers something else.

can be thin or thick.
Score 2 of 2

Question:

Multiple choice question

Read this paragraph and answer the question below.

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 protects us from 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:

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 protects us from the sun.