MATERIALS AND REVERSIBLE AND IRREVERSIBLE CHANGES

True or false: Dissolving is a reversible change. The solid (solute) and liquid (solvent) can be separated.

• TRUE

• FALSE

Which of these are irreversible changes?

• Salt dissolved in water.

• Plaster of Paris dissolved in water.

• Wood that has been burnt.

• An egg that has been boiled.

Tags

NGSS.MS-PS1-5

Which of these changes are reversible?

• Sand mixed in water.

• Rice mixed in sand.

• potato that has been baked.

• An effervescent tablet (e.g. Alka-Seltzer®) dissolved in water.

Which description best describes what happens when a material is burnt?

• The process is reversible.

• The process is irreversible: the original material is destroyed to

  produce new

• The material being burnt disappears.

• The material being burnt always turns completely into a

  gas.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of these is NOT a reversible change?

• Water to Ice
• Juice to Popsicle
• Cookie Dough to Cookie
• Melting Chocolate

Tags

NGSS.5-PS1-4

Which is not a property of matter?

• solid
• liquid
• gas
• ice

A popsicle is a.....

• gas
• liquid
• solid

Which of these are examples of how materials can change? (Select all that apply)

• State

• Colour

• Shape

• Bubble

• Name

When ice melts, this is an example of a material changing...

• State

• Colour

• Shape

• Bubble

Which of the following is an example of material changing shape?

• Mixing salt in water

• Snapping a stick

• Mixing vinegar and baking powder

• Bleaching material