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You forgot to dry the bread knife when you washed it and reddish brown spots appeared on it. (Rust)
Physical Change
dying your hair
Reactants
salt being mixed with water
physical, chemical
cost
all of the above
Chemical Change
Which of the following is evidence of a chemical change?
Physical Change
dying your hair
Reactants
salt being mixed with water
physical, chemical
cost
all of the above
Chemical Change
A straight piece of wire is coiled to form a spring. What type of change?
Physical Change
dying your hair
Reactants
salt being mixed with water
physical, chemical
cost
all of the above
Chemical Change
Which of the following is NOT a chemical change?
Physical Change
dying your hair
Reactants
salt being mixed with water
physical, chemical
cost
all of the above
Chemical Change
Chewing food to break it down into smaller particles represents a _________ change, but the changing of starch into sugars by enzymes in the digestive system represents a ___________change.
Physical Change
dying your hair
Reactants
salt being mixed with water
physical, chemical
cost
all of the above
Chemical Change
In a chemical equations, the compounds or elements on the left side of the arrow are called the _________________________.
Physical Change
dying your hair
Reactants
salt being mixed with water
physical, chemical
cost
all of the above
Chemical Change
Scientists study the characteristics of substances to better understand the natural world. Which of the following is not a chemical or physical characteristic of a substance?
Physical Change
dying your hair
Reactants
salt being mixed with water
physical, chemical
cost
all of the above
Chemical Change
Which of the following is NOT a physical change?
Physical Change
dying your hair
Reactants
salt being mixed with water
physical, chemical
cost
all of the above
Chemical Change
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