Vocabulary
Is a melted popsicle an example of a physical change?
Explain why?
What is YES? You can melt and refreeze a popsicle and it will still be a popsicle.
Give an example of a chemical change.
What is a cake, because you cannot turn a cake back into the eggs, flour, sugar, etc. that you mixed together? I will take any other ideas of a chemical change
Crumpling a piece of paper
What is physical
Seeing bubbles is a clue that a chemical change has occurred?
What is True
a change in a substance that does not change what the substance is.
What are Physical change
Is Alka-Seltzer and water an example of a physical or chemical change? Explain why
What is Chemical Change? When you mix Alka-Seltzer and water, bubbles form, which indicates a chemical change as taken place.
Cooking Pancakes
Grinding, Cutting, Crushing, Bending, Breaking are all ways that you can cause a chemical change
False
What are some examples (clues) that a physical change has occurred?
What is a change in size, shape or phase.
Give 2 examples (clues) that a chemical change has occurred.
What is Burning, Rusting, Tarnishing, etc.
Melting Ice
What is physical change
You can reverse a chemical change
False
When a chemical change occurs, energy is either __________ or _________.
What is released or absorbed.
Is rust an example of a chemical change? Explain why?
What is YES? You cannot change rust back into the metal is was before; therefore, it is a chemical change.
Paper towel absorbs water
What is physical change
A chemical reaction that absorbs energy in the form of heat is called endothermic
What is true
A chemical reaction that releases energy in the form of heat is called
What is a Exothermic?
CHALLENGE (not a quiz question) Explain how a rocket launch is an example of a chemical change.
What is the fuel combines with another chemcial to produce large volumes of a hot gas that propel the rocket into space?
Silver Tarnishing
What is chemical change
A change is phase is always a physical change
True