BIOLOGY 2 CHAPTER 2-3-4

Which of the following statements are correct?

A. Protons have a positive charge.

B. Electrons have a negative charge.

C. Neutrons have a positive charge.

• A

• B

• A + B

• C

• A + C

Atoms of a given element ALWAYS contain the same number of ______________.

• protons and electrons

• protons and neutrons

• neutrons and electrons

• all of these

• none of these

A solution with a pH of 2 is _____ times more ______ than a solution with a pH of 4.

• 2 , acidic

• 20 , acidic

• 100 , acidic

• 20 , basic

• 2 , basic

An acid has a pH ______________ 7.

• less than

• more than

• equal to

Water is an example of a _____________ substance.

• polar

• ionic

• living

• nonpolar

Which of the following is the lowest level of biological organization that can perform all the activities required for life?

• atom

• tissue

• cell

• organism

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

What is the approximate mass of an atom with 16 neutrons, 15 protons, and 15 electrons?

• 30 daltons

• 31 daltons

• 1 dalton

• 46 daltons

Tags

NGSS.MS-PS1-1

Which types of molecules like to interact with water?

• hydrophilic

• hydrophobic

• nonpolar

The property of water that allows water molecules to stick to each other is

• adhesion
• cohesion
• density
• specific heat

A solution with a pH of 8.6 would be...

• Acid
• Base
• Neutral
• Acid and Base