Biology U1 C2 Chemistry of Life

What is the definition of matter?

• Anything that has mass and occupies space

• Anything that is alive

• Anything that can move

• Anything that is a liquid

Tags

NGSS.MS-PS1-5

Which of the following is the smallest part of an element that still has the properties of that element?

• Atom

• Cell

• Molecule

• Organ

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

How many hydrogen atoms are covalently bonded to one oxygen atom in a water molecule?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

Which of the following is NOT an example of a nonpolar molecule?

• CO₂

• O₂

• Lipids

• Water

Tags

NGSS.MS-PS1-1

Why is water considered a "terrific solvent"?

• It can dissolve many substances

• It cannot mix with anything

• It is always solid

• It is magnetic

Which property of water allows it to stick to other substances?

• Adhesion

• Cohesion

• High specific heat

• Density

What does the term "cohesion" refer to in the context of molecules?

• The attraction between molecules of the same substance

• The attraction between molecules of different substances

• The process of molecules evaporating

• The breaking of chemical bonds

What is the result of cohesion among water molecules?

• Low surface tension

• High surface tension

• No surface tension

• Increased evaporation

What is adhesion?

• The attraction between two different molecules

• The attraction between two similar molecules

• The process of evaporation

• The process of melting

Which of the following is an example of adhesion?

• Water droplets sticking together

• Meniscus forming on a graduated cylinder

• Ice melting in the sun

• Water boiling at 100°C