Year 7- The Particle Model

Based on the particle model, which of the following is likely to be a liquid?

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• 
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Matter is best defined as...

• Anything that takes up space (volume)

• Anything that can be weighed (mass)

• Anything that takes up space (volume) and can be weighed (mass)

• Anything that is solid

Which of the following best represents a volume measurement of 50 millilitres? 

• ml= 50

• v=50mL

• V=50L

• V=50ml

When solid particles get heated up, they...

• Gain energy and start to move apart

• Vibrate in a fixed spot

• Lose energy and move closer together

• Gain energy and move at a high speed

When gas particles start to cool down, they...

• Gain energy and move at a high speed

• Lose energy and move at a high speed

• Lose energy and move closer together

• Lose energy and vibrate in a fixed position

What holds particles together?

• Molecules

• Other particles

• Glue

• A force of attraction

If the boiling point of water is 100oC, determine the state water is in when it is at 102oC

• Solid

• Liquid

• Gas

• Steam

Identify the correct statement about phase changes.  

• During condensation, the thermal energy of the particles increases

• During freezing, the thermal energy of the particles increases.  

• During boiling, the thermal energy of the particles decreases. 

• During melting, the thermal energy of the particles increases.  

In which state do particles have the least amount of energy?

• Solid

• Liquid

• Gas

Which of the following statements is correct about gases

• Their volume is fixed and shape is fixed

• Their volume is fixed and shape is changeable

• Their volume is changeable and shape is fixed

• Their volume is changeable and shape is changeable