Give an example of formation of gas as a chemical change.
Baking soda to vinegar, etc.
Name one thing you learned today.
Cool, thanks for sharing! / Wow, do you really not know?
Name four examples of chemical changes.
Wow, you really know your stuff! / Sorry, we were looking for...
How are chemical changes important to living things?
Wow, you really know your stuff! / Sorry, we were looking for...
Is it a physical or chemical change when milk spoils? Why?
Yes, bacteria are forming in the milk, changing its smell.
What is a chemical change?
A change that causes different kinds of matter to form.
Is burning a match a chemical or physical change? How do you know?
Chemical: light, heat, ash, smell, smoke are created.
How did the statue of liberty get its green color?
Oxidization of copper (a chemical change).
Is sugar dissolving in water a physical or chemical change? Explain.
Physical change because chemical bonds are not broken and new products are not formed.
What are the signs of a chemical change in a campfire?
Light and heat.