Science 6 - Physical and Chemical Change

What is an example of physical change?

• Crashing the can

• Rusting on the can

• Rotting oranges

• Baking the muffin

Which picture shows a chemical change?

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• 
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Which is the best example of a change that can be undone?

• clay put in an oven to harden
• cake batter put in an oven to bake
• chocolate left in a warm car to melt
• wood being burnt

Gwen’s family built a wood fire in the fireplace. The next day, Gwen noticed that there was no wood left in the fireplace, only ashes. Which best explains this?

• Wood is separated from ashes as it burns.
• Wood becomes a new substance as it burns.
• Ashes have the same properties as wood.
• Ashes are the same substance as wood.

Which best explains what happens to the inside of an egg when it is boiled?

• The liquid becomes solid.
  
• The solid becomes a gas.
• The solid becomes a liquid. 
• he liquid becomes a gas.

Which of these is NOT an example of a physical change process?

• squeezing

• rusting

• freezing

• cutting

A potter molded wet clay into the shape of a bowl and let it dry. The potter knows that the clay went through a physical change when it became a bowl because the bowl ...

• is a different color than the wet clay.

• is the same substance as the wet clay.

• has a different texture than the wet clay.

• holds the same amount of water as the wet clay.

Burning leaves is a chemical change.

What evidence of this change?

• The leaves emit light during the change. 
• The temperature of the leaves increases.
• It produces new subtance called ash

• All the answer are correct

Ramano is baking the muffin.

What change is occurring during baking?

• The muffin produces light

• The muffin releases ash

• The muffin is fluffy

• The muffin changes from solid to liquid

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