Grade 9 Science Chemistry Review

What is an example of a synthetic chemical?

• polyester 
• wood 
• cotton
• wool

What is an example of a natural chemical?

• nylon
• polyester
• cotton
• fleece

Which is an example of a chemical property?

• state
• colour
• luster
• all of the above 

Which of the following is an example of an element?

• Water
• Carbon 
• Oil
• Carbon Dioxide 

Tags

NGSS.HS-PS1-1

Which of the following is an example of a mechanical mixture?

• Water
• cereal and milk 
• brass
• salt water 

An electron is:

• Neutral 
• Positively Charged 
• Electrostatic 
• Negatively Charged 

When the number of electrons and protons is the same, the atom will: 

• Have no charge
• A positive charge
• Explode
• A negative charge

Which of the following is not one of the 4 statements that make up Dalton's Atomic Theory?

• All matter is made up of small particles called atoms
• Atoms cannot be created or destroyed by ordinary means
• Atoms combine with other atoms to form larger particles called molecules
• The entropy of an isolated system will increase 

State the type and number of atoms found in CO_2:

• 2 carbons and 2 oxygen
• 1 Carbon and 2 Oxygen
• 1 Nitrogen and 2 Oxygen
• 2 Carbon and 1 Oxygen

Tags

NGSS.MS-PS1-1

What is the chemical name of NO₂?

• Nitrogen dioxide 
• Dinitrogen dioxide
• Dinitrogen oxide 
• Dioxide nitrogen