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1. Which statement is true about natural
resources?

A. They are only found in living things.
B. They only provide sources of food and
material to humans.
C. They can be man-made or found in nature.
D. They can be a substance, material, object or
source of energy.

2. How do the properties of a substance that is
the result of a chemical reaction compare to the
properties of the starting material?

A. The properties will stay the same.
B. The properties will be different.
C. The properties stayed the same and new
properties will be added.

3. Chlorine is a poisonous gas. Sodium reacts
explosively with water. When chlorine and
sodium react with each other, the product is
the salt we sprinkle on our food. Which
principle does this demonstrate?

A. Reactants are more dangerous than products.
B. Energy is released by some reactions and
absorbed by others.
C. When two reactants form one product, the
reaction is spontaneous.

Sagot :

jerin212223

Answer:

1. D. They can be a substance, material, object or  source of energy.

2. B. The properties will be different.

3. C. When two reactants form one product, the  reaction is spontaneous.

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