Properties of Water

What is matter?

• Anything that takes up space and has mass

• A substance that cannot be broken down into other substances

• A substance consisting of two or more different elements

• A substance that does not take up space

What is an element?

• A substance that takes up space and has mass

• A substance that cannot be broken down into other substances by chemical reactions

• A substance consisting of two or more different elements

• A substance that can be broken down into other substances by physical reactions

What is a compound?

• A substance that takes up space and has mass

• A substance that cannot be broken down into other substances by chemical reactions

• A substance consisting of two or more different elements combined in a fixed ratio

• A substance that can be broken down into other substances by physical reactions

What percentage of the 92 naturally occurring elements are essential to survive and reproduce?

• 10-15%

• 20-25%

• 30-35%

• 40-45%

CHOPN make up what percentage of living matter?

• 50%

• 75%

• 96%

• 100%

What are trace elements?

• Elements that are not required by any organism

• Elements that are required by an organism in very small quantities

• Elements that make up 96% of living matter

• Elements that are required in large quantities

Which of the following is NOT an example of a trace element?

• Zinc

• Iron

• Copper

• Sodium

What role does zinc play in the human body?

• Helps the body's immune system

• Necessary for blood production

• Works with iron to produce blood cells

• Helps in digestion

What role does iron play in the human body?

• Helps the body's immune system

• Necessary for blood production

• Works with zinc to produce blood cells

• Helps in digestion

What role does copper play in the human body?

• Helps the body's immune system

• Necessary for blood production

• Works with iron to produce blood cells

• Helps in digestion