A&P -Chapter 2 Part 1

What is chemistry?

• The study of living organisms

• The branch of science that deals with the composition and characteristics of chemicals

• The study of celestial bodies

• The science of weather patterns

What are our foods, liquids, and medications composed of?

• Metals

• Chemicals

• Gases

• Rocks

What are cells and their organelles composed of?

• Rocks

• Metals

• Molecules, which are composed of chemicals

• Gases

What is matter?

• Anything that has weight and takes up space

• Only living things

• Only nonliving things

• Anything that has color

What are elements?

• The largest units of matter

• The smallest units of matter with specific chemical properties

• Units of matter without any properties

• The heaviest units of matter

Which elements are most abundant in living organisms?

• Gold, silver, and platinum

• Oxygen, carbon, hydrogen, and nitrogen

• Iron, copper, and zinc

• Helium, neon, and argon

What are atoms?

• The largest unit of an element

• The smallest unit of an element

• Units of matter without mass

• Units of matter without volume

What are chemical bonds?

• Attractions between two or more atoms

• Repulsions between two or more atoms

• Attractions between two or more molecules

• Repulsions between two or more molecules

Which element makes up the largest percentage of the human body by weight?

• Carbon

• Hydrogen

• Oxygen

• Nitrogen

What percentage of the body do the trace elements together make up?

• Less than 0.1%

• 1%

• 5%

• 10%