physical and chemical changes

Which of the following is a sign that a chemical reaction has occurred?

• change in shape
• melting
• formation of a gas
• dissolving

Is hammering wood together to build a house a chemical or physical change?

• chemical
• physical

Is melting butter for popcorn a chemical or physical change?

• chemical
• physical

Is burning wood a chemical or physical change?

• chemical
• physical

A change in the size, shape, or state of matter.

• chemical change
• physical change
• chemical reaction
• electron change

Tags

NGSS.MS-PS1-4

Adding baking soda and vinegar together and it fizzes and creates carbon dioxide.

• Chemical
• Physical

What is an example of a Chemical change?

• Ripped paper 
• boiled egg
• cracked egg
• sugar in water

what is burning?

• physical change
• physical property
• chemical change
• chemical property

what is digestion?

• body function
• chemical change
• physical change

One cup of water is left outside for two days when it was checked there was only half a cup left. What happened?

• evaporation; chemical change
• condensation; physical change 
• evaporation; physical change
• condensation; chemical change