Water Properties and BIological Molecules

Electrons are ______ charged particles and are about 1/1840 the mass of a proton.

• Positively

• Negatively

• Neutrally

• Doubly

Tags

NGSS.MS-PS2-3

An element is a pure substance that consists entirely of one type of ______.

• Molecule

• Atom

• Compound

• Electron

Tags

NGSS.MS-PS1-1

Cohesion is the attraction between molecules of the ______ substance.

• Same

• Different

• Opposite

• Neutral

In a salt water solution, what is the solute?

• Water

• Salt

• Sugar

• Oil

A suspension is a mixture of water and a non-dissolved material that does not settle.

• True

• False

At a pH of 7, the concentration of H+ ions and OH- ions is:

• Equal

• H+ is greater

• OH- is greater

• None of the above

What are proteins made of?

• Lipids

• Amino acids

• Carbohydrates

• Nucleotides

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-6

What information is contained in a chemical formula?

• Number of atoms

• Type of atoms

• Both A and B

• None of the above.

Tags

NGSS.MS-PS1-1

Use the structure of a water molecule to explain why it is polar.

• Unequal sharing of electrons

• Equal sharing of electrons

• No sharing of electrons

• None of the above.

Tags

NGSS.HS-PS1-1

In polymerization, complex molecules are formed by the joining together of

• Macromolecules

• Carbohydrates

• Polymers

• Monomers