Salt water is an example of what type of mixture? Homogenous or heterogenous?
Homogenous
15
Oxygen is an example of what type of pure substance? Element or compound?
Element
15
A heterogeneous mixture has
A) only one component
B) at least two components which look like one substance
C) at least two visible components
D) a uniform distribution of a single phase
B
25
Water is an example of which type of pure substance? Element or compound?
Compound
15
Milk is an example of what type of mixture? Homogenous or heterogenous?
Homogenous
15
A nail rusting is an example of a chemical or physical change?
chemical
15
Alcohol evaporates is an example of a chemical or physical change?
physical
15
Food is digested. Is this an example of a chemical or physical change?
chemical
15
Blow drying wet hair is an example of chemical or physical change?
physical
15
Nitrogen is an example of what type of pure substance? compound or element?
element
15
What does this symbol represent?
corrosive material
20
True or false: when you are done with a chemical, you should immediately pour it down the sink.
False
15
True or false: It is okay to smell a substance as long as the teacher gives permission.
True
15
Baking soda and vinegar make carbon dioxide. Physical or chemical change?
chemical
15
Jello is an example of what type of mixture? Homogenous or heterogenous?