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All of the following are physical changes except:
one substance dissolves into another
rocket fuel burning
iron rusts
substances with different properties form a new substance
an increase in temperature
a decrease in temperature
matter is neither created nor destroyed
new substances are created
What does the law of conservation of matter state?
one substance dissolves into another
rocket fuel burning
iron rusts
substances with different properties form a new substance
an increase in temperature
a decrease in temperature
matter is neither created nor destroyed
new substances are created
Which observation would most likely indicate that an exothermic reaction has occurred?
one substance dissolves into another
rocket fuel burning
iron rusts
substances with different properties form a new substance
an increase in temperature
a decrease in temperature
matter is neither created nor destroyed
new substances are created
How do you know whether a chemical reaction between two substances has occurred?
one substance dissolves into another
rocket fuel burning
iron rusts
substances with different properties form a new substance
an increase in temperature
a decrease in temperature
matter is neither created nor destroyed
new substances are created
Which observation would most likely indicate that an endothermic reaction has occurred?
one substance dissolves into another
rocket fuel burning
iron rusts
substances with different properties form a new substance
an increase in temperature
a decrease in temperature
matter is neither created nor destroyed
new substances are created
What happens during a chemical change?
one substance dissolves into another
rocket fuel burning
iron rusts
substances with different properties form a new substance
an increase in temperature
a decrease in temperature
matter is neither created nor destroyed
new substances are created
All of the following are signs of a chemical reaction except one. Which is NOT a sign of a chemical react
one substance dissolves into another
rocket fuel burning
iron rusts
substances with different properties form a new substance
an increase in temperature
a decrease in temperature
matter is neither created nor destroyed
new substances are created
Which of the following is an example of a chemical reaction?
one substance dissolves into another
rocket fuel burning
iron rusts
substances with different properties form a new substance
an increase in temperature
a decrease in temperature
matter is neither created nor destroyed
new substances are created
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