Investigating Chemical Reactions: Video Assessment

The video tutorial introduces the concept of chemical processes, where substances change to form new ones. It discusses indications of chemical reactions, such as the production of new substances, and explains the role of reactants. The tutorial also covers exothermic reactions, highlighting how energy is released during these processes.

What is a chemical reaction?

• A process where substances remain unchanged

• A process that involves only physical changes

• A process that does not involve any energy

• A process where substances change to form new substances

Which of the following is an indication of a chemical reaction?

• Change in shape

• Change in color

• Change in size

• Change in texture

What are the substances called that enter a chemical reaction?

• Catalysts

• Products

• Reactants

• Inhibitors

Which of the following is an example of a chemical reaction?

• Rusting of iron

• Melting of ice

• Breaking of glass

• Boiling of water

In an exothermic reaction, what happens to energy?

• Energy is destroyed

• Energy is unchanged

• Energy is released

• Energy is absorbed