Chemical Properties and Reactions

________ result(s) in no new substances.

• A physical change
• A chemical change
• Physical and chemical changes
• None of the above

Which is an example of a physical change?

• Burning wood
• Freezing water
• Rust on a car
• Cooking food

Which is an example of a chemical change?

• Burning wood
• Rust on a car
• Cooking food
• All of the above

If you start a chemical reaction with 5 atoms of helium, how many atoms will you have after?

• 4 atoms
• 10 atoms
• 1 atom
• 5 atoms

Which of the following are properties of matter?

• Magnetism
• Color
• Odor
• All of the above

Is TNT exploding a physical or chemical change?

• Physical
• Chemical
• Both physical and chemical
• Neither physical nor chemical

Which is the name of the kind of solid substance formed in this figure?  

• aqueous 
• precipitate
• acid
• synthesis 

An gel ice pack getting cold after you put it in the freezer for an hour.

• Chemical Change

• Physical Change

What indicates a chemical reaction occurred?

• Heat or Light is released
  heat or light is produced
• gas (bubbles) produced
• color change
• all of the above

1. How is a chemical change different from a physical change?

• there is no difference

• a physical change creates a new substance

• a chemical change creates a new substance