Weegy: Flammability is a material s ability to burn in the presence of A. hydrogen. [smile]
User: Which of the following is a physical change?
A. sawing a piece of wood in half
B. burning a piece of wood
C. rust forming on an iron fence
D. a copper roof changing color from red to green
Weegy: ... following is a physical change? A) sawing a piece of wood in half B) burning a piece of wood C) rust forming on an iron fence D) a copper roof [ changing color from ... ]
User: Which of the following materials is useful for making molds because it has a low melting point?
A. wood
B. metal
C. clay
D. wax
Weegy: D. wax, has a low melting point useful for making molds
User: Which of the following is malleable?
A. glass
B. pottery
C. ice
D. gold
Weegy: Gold is malleable.
User: Which of the following is a clue of a chemical change?
A. iron changes color when heated
B. gas bubbles form in boiling water
C. balls of wax form when melted wax is poured into ice water
D. a gas forms when vinegar and baking soda are mixed
Weegy: Which of the following is a clue of a chemical change? D. a gas forms when vinegar and baking soda are mixed.
User: A substance that is made up of only one kind of atom is a(an)
A. compound.
B. homogeneous mixture.
C. element.
D. solution.
Weegy: A substance that is made up of only one kind of atom is an element. C. element.
User: Which of the following is a heterogeneous mixture?
A. water in a swimming pool
B. sugar water
C. a jar of mixed nuts
D. stainless steel
Weegy: A jar of mixed nuts is a heterogeneous mixture.
User: If an unknown substance CANNOT be broken down into simpler substances, it is
A. a compound.
B. an element.
C. made of one kind of atom.
D. both b and c
Weegy: D. both b and c
User: If a material contains three elements joined in a fixed proportion, it is a(an)
A. mixture.
B. solution.
C. atom.
D. compound
Weegy: If a material contains three elements ...
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