BSU Bio111, Exam 1 practice questions, Brand

Atoms in molecules share pairs of electrons when they make

• covalent bonds.
• ionic bonds.
• hydrogen bonds.
• polymers.

Tags

NGSS.HS-PS1-1

When molecules are attracted to each other (themselves) it is called.....

• cohesion
• adhesion
• self liking
• ionic bonds

When molecules are attracted to molecules of another substance it is called....

• cohesion
• adhesion
• surface tension
• ionic bonding

What are the four elements that all life is made up of?

• Hydrogen, Oxygen, Nitrogen and Carbon
• Helium, Oxygen, Neon and Carbon
• Hydrogen, Titanium, Carbon, Nitrogen
• Oxygen, Chlorine, Iron, Nitrogen

Tags

NGSS.HS-LS1-6

Which of the following is correctly defined as the attraction of the hydrogen from one molecule to the oxygen of a different molecule?

• amphipathic
• hydrophobic
• hydrogen bonding
• adhesion

What property of water allows it to be such a versatile solvent that it is often called the "universal solvent?"

• Purity
• Polarity and cohesion
• High heat capacity
• Expansion upon freezing

Tags

NGSS.HS-ESS2-5

 Many fish and aquatic plants can survive a cold winter because the layer of ice that forms at the top of the lake insulates the water below and prevents the lake from freezing solid. What unique property of water contributes to this effect? 

• Water absorbs heat when it evaporates and forms a gas 
•  Water expands and becomes less dense when it freezes.
• Water molecules completely separate into ions in solutions.
•  Water forms hydrogen bonds with ions and other polar substances. 

Tags

NGSS.HS-ESS2-5

Why can water have no net charge but have slight charges in different parts of the molecule?

• The oxygen end is slightly negative and the hydrogen end is slightly positive
• The hydrogen end is slightly negative and the oxygen end is slightly positive
• The hydrogen and oxygen ends change in polarity
• Because it is hydrophobic

Tags

NGSS.MS-PS1-1

Large bodies of water do not quickly fluctuate in temperature. Why?

• Water is a solvent.
• Water has a high heat capacity.
• Water acts as a buffer.
• Water is non-polar.

Tags

NGSS.HS-ESS2-5

NGSS.HS-PS3-4

Attractions between water molecules are called

• Covalent bonds
• Ionic bonds
• Polar bonds
• Hydrogen bonds

Tags

NGSS.HS-PS1-3