Ch 6 Changes Around Us

Ice melts to form water. What is the cause of this change.

• Heat

• Cooling

• Both heating and cooling

• None of above

Which of these changes can be reversed? (Select all that apply)

• Rolling dough (before baking)

• Clothes becoming wet

• Writing with pen

• Tearing paper

Which of these cannot be reversed

• Heating metal

• Cutting out airplane

• Folding paper plane

Heating metal cannot be reversed (T/F)

• True

• False

When object is cooled, it's size

• Increases

• Decreases

• Remains same

• None of the above

The burning of wood

• Can be reversed

• Cannot be reversed

• Can be expanded

• Can be melted

Photosynthesis is an example of a

• physical change
• chemical change

Freezing juice is an example of a(n) ________

• physical change
• chemical change

Which of the following changes cannot be reversed?

• Milk to paneer

• Cold milk to hot milk

• Yarn to knitted sweater

• Wet clothes to dry clothes

Changes that lead to the formation of new substances are called_________.

• Physical change

• Chemical change