Chemical and Physical Changes

Which is a way that a piece of paper can go through a chemical change?

• fold the paper in half
• soak the paper in water
• burn the paper with fire
• cut the paper with scissors

Which of these is an example of a new substance being formed?

• a nail rusting
• a wall being painted
• water changing to steam
• paper being folded

Which best describes a chemical change in paper?

• filing paper
• mailing paper
• burning paper
• cutting paper in half

Which is an example of a chemical change?

• baking a cake
• freezing water
• crushing a can
• breaking an egg

Which example best describes a physical change?

• iron rusting
• charcoal burning
• an ice cube melting
• a marshmallow burning

When coffee is poured into a cup of ice, the ice begins to melt and mix with the coffee. Which statement best describes this change?

• The ice melting is a chemical change because the water changes form.
• The ice melting is a physical change because the water may be frozen again.
• The water and coffee mixing is a chemical change because the liquids change color.
• The water and coffee mixing is a physical change because the mixture forms bubbles.

Which statement best describes why baking a cake is an example of a chemical change?

• The process takes place in an oven.
• The process requires heat energy.
• The process cannot be reversed.
• The process can be repeated.

Stanley left an ice cube on his kitchen counter. An hour later, Stanley observed that the ice cube melted. Which statement best describes this change?

• Ice melting is a physical change because a new substance is created.
• Ice melting is a chemical change because a new substance is created.
• Ice melting is a chemical change because it may be reversed.
• Ice melting is a physical change because it may be reversed.

Which of the following is NOT an example of a physical change?

• crumpled paper
• pencil sharpening
• shrunken clothing
• sour milk

When you break a cracker into pieces it is a 

• Chemical change
• Physical change
• Chemical Weathering
• Physical Weathering