States of Matter & Energy Resources

8/8/2019 States of Matter & Energy Resources

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7th

grade Energy resources & states of matter

Name: _________________

Part I: Choose the correct answer for each of the following: [10]

1. In which of the following are the particles arranged in a regular pattern?A a gas B a liquid C a metal D a solution

2 . Oxides of nitrogen from car exhausts can spread through the atmosphere.

This occurs because gas molecules movefrom a region of ««1«« concentrationto a region of ««2«« concentration bya process called ««3«« .Which words correctly complete the

gaps?1 2 3

A high low diffusion

B high low evaporation

C low high diffusion

D low high evaporation

3. A shirt is stained with red ink from a pen. The shirt is left to soak in a bowl of water .

Which process causes the red colour to spread?A diffusion B evaporation C melting D condensation

4. Some students are asked to describe differences between gases and liquids. Three of their suggestions are:

1 gas molecules are further apart;

2 gas molecules are smaller;

3 liquid molecules vibrate around fixed positions.

Which suggestions are correct?A 1 only B 2 only C 3 only D 1, 2 and 3



5 . In which change of state do the particles become more widely separated?

A gas to liquid B gas to solid C liquid to gas D liquid to solid

6 . A coloured liquid vaporises easily at room temperature. Some of the liquid is placed atthe bottom of a sealed gas jar. Which diagram shows the appearance of the jar after several hours?

7 . What is the source of the energy converted by a hydro -electric power station?A hot rocks B falling water C oil D waves

8 . Which form of energy do we receive directly from the Sun?A chemical B light C nuclear D sound

9. Some water molecules escape from the surface of a lake. Which name is given to thisprocess?A boiling B convection C evaporation D radiation

10. A suspension of pollen grains in water is observed under a microscope. The pollengrains are seen to be moving all the time. Which diagram illustrates this motion?

Part II: Answer each of the following questions:

1. Some energy resources are non-renewable. What does this mean? Give two examples. [4]



2. Some energy resources are renewable. What does this mean? Give two examples. [4]

3. Describe one problem (disadvantage) caused by using each of the following: [6]

a. Wind energy:

b. Biomass fuel:

c. Nuclear energy:

4. Complete the following diagram [4]

5. Use the kinetic theory to explain why a gas has no fixed shape or volume. [3]

Good Luck Anan W. Barghouthy

Solid Liquid Gas

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States of Matter & Energy Resources