WorksheetsReview 6.5C
Total questions: 11
Worksheet time: 7mins
What is true about ALL chemical changes?
They all produces gas/bubbles/fizzing
They all have a temperature change (hotter/colder)
They all change colors
They all produce NEW and DIFFERENT substances
A teacher shows the class two liquids that are both odorless and clear. When they mix together, solid gold chunks are formed. What change occurred and how do you know?
A chemical change because a precipitate was formed
A physical change because there was a color change
A chemical change because an odor was produced
A physical change because the volume increased when the two liquids were mixed together.
In class, a teacher places a balloon filled with baking soda over a flask filled with vinegar. When the powder falls into the flask and combines with the vinegar, the balloon inflates (fills up with air). What evidence is there that a chemical change occurs?
The powder and liquid combine
A gas is produced that fills up the balloon.
There is no evidence that a chemical reaction to place
The powder stayed solid so it is considered a precipitate
When I go to Chipotle I love to order guacamole. It smells amazing and tastes even better! Unfortunately, sometimes I don't eat it fast enough and it turns brown. Stirring it up hides the brown, but if it sits out longer, it continues to change. What indicates a chemical reaction in this scenario?
The guacamole smells amazing
The guacamole tastes incredible
The guacamole turns a yucky brown color
I stir the guacamole to get rid of the brown
Check all of the words that may indicate a Physical Change:
Melting
Freezing
Burning
Mixing
Precipitate formed
Choose all of the words that may indicate a chemical change has occurred.
Burning
Evaporating
Dissolving
Odor change
Energy change (sound,light, temp)
