Generation Genius - Chemical vs Physical Changes (Genius Challenge)

What is your name?

If two substances are mixed and a new substance is formed, what type of change is it?

Placing the spoon in hot water was a PHYSICAL change since the melted metal was still…

• Gallium
• Iron
• Steel
• Aluminum

When a substance changes states (melts, evaporates, etc.) it is often what type of change?

When something burns, it is a:

• Physical change
• Chemical change

True or false: Since gas is detected during the candy + soda demo, it is an example of a chemical change.

• True
• False

What is the evidence that the gas made in the mentos + soda demo was carbon dioxide?

Which of these is the most reliable way to see if a new gas has formed?

• Fill up a balloon
• Flame test
• Measure temperature
• Look at it

How does hydrogen react in a flame test?

Milk spoiling is an example of which type of change?