Science 4 Recall Activity

Which of the following is a chemical change?

• Melting ice

• Tearing paper

• Burning wood

• Cutting a string

What happens during a physical change?

• A new substance is formed

• The object burns

• Only shape or state changes

• It smells bad

Which activity shows a chemical reaction?

• Freezing water

• Mixing baking soda and vinegar

• Crumpling a paper

• Breaking glass

Which is NOT a sign of a chemical change?

• Bubbles form

• Color changes

• Shape changes

• A new smell

When you dissolve sugar in water, what kind of change is it?

• Physical

• Chemical

• Both

• None

What property tells us if a material can catch fire?

• Flexibility

• Hardness

• Flammability

• Texture

What is an example of a physical property?

• Rusting

• Burning

• Melting point

• Decomposition

What happens to paper when it is burned?

• It gets wet

• It becomes cold

• It turns to ash

• It stays the same

Which of these materials is biodegradable?

• Plastic bag

• Banana peel

• Aluminum foil

• Glass bottle

Why can't you reverse a chemical change easily?

• It's cold

• A new substance is formed

• It's not safe

• It's too soft