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G7 CH8 - Physical and chemical reaction
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When an acid is added to a metal it bubbles and gives off a gas. What is the name of the gas?
Hydrogen
Write the name of the product in the space below the diagram.
Magnesium Oxide
In the circles of this particle diagram, write the symbols of the elements that make up the product.
Mg O and Mg O
here oxygen reacts with hydrogen to form water. The elements that make this compound are ________
Oxygen and Hydrogen
here oxygen reacts with hydrogen to form water. The compound that is made in this reaction is ________
Water (H20)
When you let off fireworks, it is a physical change. (True/False)
False
When you cook an egg, it is a chemical change. (True/False)
True
When your cells use food to release energy, it is a physical change (True/False)
False
When ice melts to form water, it is a chemical change. (True/False)
False
When iron atoms bond with sulfur atoms, it is a chemical change (True/False)
True
In a physical change, no new substances are formed. (True/False)
True


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