Chap 7: Chemical Reaction

a substance formed in a chemical reaction

• reactant

• reaction

• product

• bond

a quality of characteristic of something

• property

• reaction

• chemical

• compound

a substance that enters a chemical and is changed

• reactant

• product

• chemical

• atom

in chemistry, the change that happens when two or more substance act on each other to form a different substance

• matter

• conserve

• chemical

• reaction

A chemical change occurs because

• The atoms are changing

• A chemical reaction has occurred

• Nothing new is made

• A change in state of matter occurred

A chemical change is different to a physical change because in a chemical change

• Chemicals are used

• Molecules do not physically touch

• A new substance is formed and in a physical change no new substance is formed

• The change can be seen but in a physical change it cannot

The left side of the equation below is called

• Products
• Reactants

The right side of the equation below is called the

• products
• reactants

Which statement is not a description of a chemical reaction?

• A solid is dropped into a beaker of liquid and a gas is released.
• Two liquids are mixed in a beaker and a solid forms at the bottom of the beaker.
• A solid is dropped into a beaker of liquid and an explosion occurs.
• A liquid is heated in the sun and half of it evaporates.

A chemical reaction that absorbs heat

• Single replacement
• Exothermic
• Endothermic
• Decomposition