Year 8 Science Physical Changes

What process is happening at X? (a)  

• Melting
• Freezing
• Evaporating
• Condensing
• Don't know/Can't remember

Dry ice is carbon dioxide gas that has been cooled until it freezes into a solid. It turns directly from a solid to a gas when heated! What is this process called?

• Sublimation

• Hallucination

• Modification

• Don't know/Can't remember

When drawing a solid the particles should be drawn...

• As circles the same size, touching, and in rows & columns

• As circles of different sizes, touching, and in rows & columns

• As circles the same size, but not touching, and in rows & columns

• Don't now/Can't remember

What is the temperature of ice?

• 0℃

• 4℃

• 20℃

• 100℃

• Don't know/Can't remember

What is the temperature of boiling water?

• 0℃

• 4℃

• 20℃

• 100℃

• Don't know/Can't remember

Which label on the graph shows evaporation?

• D

• A

• B

• C

• E

Which label on the graph shows melting?

• B

• A

• C

• D

• E

At B and D on the graph, the line is not rising, but the material is sill being heated. What sentence best explains what is happening?

• All the heat is being absorbed by the beaker rather than the ice or the water

• All the heat is being dissipated by the liquid so it escapes into the atmosphere

• All the heat is being absorbed by the particles to break the attraction between them

• Don't know/Can't remember

Give the name of any solid that can be dissolved.

• Solute

• Solvent

• Solution

• Don't know/Can't remember

Give the name of any liquid that can be used to dissolve a solid.

• Solute

• Solvent

• Solution

• Don't know/Can't remember