Chemistry

What kind of change is occurring when the candle is melting ?

• Chemical (irreversible)

• Physical (reversible)

What kind of change is occurring when baking cookies ?

• chemical (irreversible)

• physical (reversible)

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5

What kind of change is occurring to the water as it freezes?

• chemical (irreversible)

• physical (reversible)

Tags

NGSS.MS-PS1-2

What would be the best technique to separate a mixture of beans and rice?

• sieves / strainers (various sizes)

• distilling / Using water

• magnet

• evaporation

Which method would be the best to use in order to separate aquarium rocks and sawdust?

• sieves / strainer

• magnets

• distilling / water

• evaporation

When you can no longer dissolve any more sugar into water the the solution is now _________.

• solvent

• soluble

• saturated

• solvent

Salad is an example of a ____.

• solution (homogeneous)

• mixture (heterogenous)

• substance

• solute

Which method would be the best to use in order to separate sugar from lemon juice and water? 

• sieves
• magnets
• distilling / water
• evaporation.

A chocolate milkshake is an example of a _______.

• homogenous mixture

• heterogenous mixture

• substance

• liquid

The slime or film that forms on top of liquid is called _______. This is caused because the particles in the liquid cling together.

• molecules

• interaction

• surface tension

• adhesive