Chemical Changes
A _________ __________ is where a new substance is formed with different properties.
Chemical Change
Which sign of a chemical change is it when there is fizzing or bubbling
gas production
What was it called when the solid particles formed at the bottom of the test tubes during our lab?
precipitate
_____ ________ are characteristics used to describe a substance, like color, smell, texture, or density.
chemical properties
false
What is an example of a chemical change that would happen to wood?
An example of a chemical change is burning wood
True/False: A permanent color change is always a sign of a chemical reaction.
True
What was the experiment called that we did on Tuesday that demonstrated a chemical reaction where we ate our product?
Cake in a Cup
What example did we learn that would show signs of a chemical reaction because of its ability to combust, produce light AND change color?
fireworks
Which type of change in thermal energy is when heat is released after a chemical reaction.
Exothermic
In a chemical change, the properties of the original substances change completely, resulting in a _______ substance with new properties.
new
How do physical changes differ from chemical changes because it does NOT create a ____ _________?
Physical changes do not create NEW SUBSTANCE while chemical changes do.
What evidence during our "change matters" lab did we have to a use a specific tool to see if a chemical reaction occurred because this evidence could NOT be seen?
Change in temp
If I leave a piece of iron out in the rain for many months, what chemical property would I see Happen?
Which type of change in thermal energy is when heat is absorbed after a chemical reaction.
Endothermic
Cooking or baking food is a chemical change because it creates new substances with different tastes, textures, and smells, and it cannot be ___________.
Reversed
What are the two types of thermal energy or temperature changes you have in a chemical reaction
Endothermic
Exothermic
During our experiment "change Matters" when Magnesium sulfide (epsom salt) was mixed with our other chemicals the temperature DROPPED causing a ________ reaction.
exothermic
What is the chemical property called that the example of "burning a piece of wood" would fall under?
flammability
What chemical reaction takes place in the human body to help us survive?
digestion
List 5 signs that a chemical change has occurred.
Signs of a chemical change include color change, temperature change, gas production, light, or a new solid (precipitate) forming.
Evidence of a piece of bread undergoing a chemical reaction due to color change would be when what happens?
Mold growth
During our "change matters" experiment were the specific 4 signs of a chemical change we got to witness? we got to witness?
You should observe whether there are signs of (gas) bubbling, color change, or temperature change and precipitate.
List the 6 examples of chemical properties that we learned.
flammability, rust, tarnish, rot/spoil, combustibility, toxicity
What is an example of bubbles forming that is NOT a chemical change?
boiling water