Physical and Chemical Changes

Front

What is a sign that a chemical reaction has occurred? Options: change in shape, melting, formation of a gas, dissolving.

Back

formation of a gas

Front

Is melting butter for popcorn a chemical or physical change?

Back

physical

Front

Is burning wood a chemical or physical change?

Back

chemical

Front

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

• crumpled paper
• dissolving sugar in water
• freezing water
• burning a marshmallow

Back

burning a marshmallow

Front

Kim puts an ice cube in a beaker and it melts. This is a good example of:

Back

a physical change.

Front

Kool-aid dissolving in water

Back

physical change

Front

Order the liquids from most dense to least dense.

Back

4, 3, 2, 1

Front

Jack has a rock with a mass of 14g and a volume of 2cm³. What is the density of the rock?

Back

7 g/cm³

Front

A student calculated the density of a liquid and found it to be 1.36 g/ml. What is the liquid? Options: baby oil, water with food coloring, honey, dark maple syrup.

Back

honey

Front

How is a chemical change different from a physical change?

Back

A new substance is formed and in a physical change no new substance is formed