Ch.2 Biochemistry (water properties-lipids)

What is an atom?

• The smallest basic unit of matter

• A type of molecule

• A bond between elements

• A group of cells

What is an element?

• A compound of different atoms

• The smallest basic unit of matter

• One particular type of atom that cannot be broken down

• A type of chemical bond

What is a compound?

• A substance made of atoms from the same element

• A molecule made of atoms held together by covalent bonds

• A substance made of atoms of different elements

• A type of bond where electrons are shared between atoms

Which of the following is an example of a compound?

• O2

• H2

• NaCl

• N2

What type of bond is formed in compounds?

• Covalent bond

• Metallic bond

• Ionic bond

• Hydrogen bond

Which of the following is an example of a molecule?

• CaCl2

• NaCl

• H2O

• K

What type of bond is formed in molecules (electrons are shared between the elements)?

• Ionic bond

• Covalent bond

• Metallic bond

• Hydrogen bond

What type of bond is formed between the hydrogen of one water molecule and the oxygen of another?

• Ionic bond

• Covalent bond

• Hydrogen bond

• Metallic bond

What property of water allows it to resist changes in temperature?

• Viscosity

• Surface tension

• High specific heat

• Density

What is an example of cohesion in water?

• Water evaporating from a surface

• Water connecting to each other to form beads on a recently washed car

• Water dissolving sugar

• Water being absorbed by a sponge