Revision. Ecosystems

Safia is stung by a bee.Bee stings are acidic.

Calamine lotion will neutralise a bee sting. (i) Suggest the pH value of a bee sting.

(a)  

Safia is stung by a bee. (a) Bee stings are acidic. Calamine lotion will neutralise a bee sting.Suggest the pH value of calamine lotion

(a)  

Acids and alkalis can be identified using indicators. Plan how you can use an indicator to identify acids and alkalis. Include • the name of the indicator • the result with acid • the result with alkali.

(a)  

Look at the energy transfer diagram.What is the energy input?

Look at the energy transfer diagram.What are two of the energy outputs?

Complete the sentence. Energy cannot be created or (a)  

The Earth is made of several layers. Here is a diagram showing the different layers of the Earth.Complete the sentences about the structure of the Earth. (a) The centre of the Earth is called the (a)   .

The Earth is made of several layers. Here is a diagram showing the different layers of the Earth. Complete the sentences about the structure of the Earth.The mantle contains some liquid rock. This liquid rock is called (a)   .

The Earth is made of several layers. Here is a diagram showing the different layers of the Earth. Complete the sentences about the structure of the Earth

(a)  

Draw a line from each type of energy to its description