A substance made up of only one kind of atom is a(n):
A. compound
B. homogeneous mixture
C. element
D. solution - ✔✔C. element
A material that contains several elements joined in a fixed proportion is a(n):
A. mixture
B. solution
C. atom
D. compound - ✔✔D. compound
Which of the following is a mixture?
A. silicon
B. carbon dioxide
C. sodium chloride
D. sand - ✔✔D. sand
A mixture that is the same throughout and appears to contain only one substance is a:
A. element
B. homogeneous mixture
C. compound
D. heterogeneous mixture - ✔✔B. homogeneous mixture
A substance has a melting point of 0 degrees C and a boiling point of 100 degrees C. The substance most
likely is:
A. water
, B. corn syrup
C. milk
D. orange juice - ✔✔A. water
Which of the following is useful for making. molds because it has a low melting point?
A. wood
B. metal
C. clay
D. wax - ✔✔D. wax
What method can be used to separate the parts of a liquid mixture when the whole mixture passes
through a filter?
A. filtration
B. distillation
C. screening
D. straining - ✔✔B. distillation
Which of the following is a physical change?
A. sawing a piece of wood
B. burning a piece of wood
C. rust forming on an iron fence
D. a copper roof changing color from red to green - ✔✔A. sawing a piece of wood
During which of the following chemical changes does a precipitate form?
A. vinegar is added to baking soda
B. salt is added to water
C. lemon juice is added to milk
D. a banana ripens - ✔✔C. lemon juice is added to milk