Introduction
Winston Bucoy #5
October 16, 2021
Mrs. Dowdy
8th Grade Science
Task
Questions:
- True or False: A chemical change is irreversible
- List 3 examples of common chemical changes
- What are signs a chemical change has taken place?
- True or False: An explosion of fireworks is an example of chemical changes
- In Autumn, when the leaves on trees turn color, is that an example of chemical change
- What is a chemical change?
- True or False: A chemical change occurs when the composition of a substance is changed
- True or False: Brand new molecules are the products of a chemical reaction (true)
- What are the basic indicators that a reaction has occurred?
- True or False: The concept of chemical change dates back over 150 years ago
- Development of the concept of a chemical reaction had a primary role in defining what?
- True or False: The first important studies on chemical change were about gases
- What are the “ingredients” of a chemical change called?
- True or false: Chemical changes are also known as chemical reactions
- What is the best way to be completely certain whether a change is physical or chemical?
Process
Answers:
- True
- Rusting of iron, Burning of wood, Rotting banana
- Change color, Change temperature, Produce bubbles
- True
- True
- Chemical change involves combining different substances. The chemical change produces a new substance with new and different physical and chemical properties.
- True
- True
- change in temperature, a change in color, the development of an odor, the formation of a precipitate, or the formation of a gas
- False
- The Science of Chemistry
- True
- Reactants
- True
- Perform chemical analyses, such as mass spectroscopy, on the substance to determine its composition before and after a reaction