S1 term 1 Holiday work 2013

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
1. When a substance boils it changes state from to . The temperature remains constant at the during this change.
2. When a substance freezes, it changes state from to . The temperature at which this takes place is called the .
3. Which state of matter;
a) Is most easily compressed?
b) Contains particles closely packed together?
c) Contains particles with the greatest average energy?
d) Flows down wards?
e) Has the slowest moving particles?
f) Has stong forces holding its particles together? .
g) Has particles that collide least often?
The spontaneous movement of particles to spread out to fill the whole container is called .
is a change of state from solid to gas.