EXAM 1

Which of these is NOT a property of all living organisms?

• acquisition of materials and energy to maintain body functions

• responding to the environment

• caring for their offspring

• reproduction

Tags

NGSS.HS-LS4-2

Based on hierarchical levels of biological organization, which of these choices represents the broadest level?

• Jaguars, anacondas, and piranhas

• piranha

• school of piranha

• Amazon rain florest

Organisms belonging to the same _____ would be the most closely related.

• family

• genus

• class

• order

In the chemical analysis of an animal tissue sample, which element would be found in only very small amounts?

• hydrogen

• oxygen

• carbon

• iodine

The number of protons in a given atom is equal to its:

• atomic number

• neutron number

• atomic mass

• molecular formula

Tags

NGSS.HS-PS1-7

Sodium has an atomic number of 11. How many electrons would you find in the outermost orbital?

• one

• eight

• seven

• two

Tags

NGSS.HS-PS1-1

All atoms want to fill their outer shells with the maximum number of electrons, usually eight. Depending on whether atoms satisfy the octet rule will predict:

• whether they are found in nature

• the chemical behavior of the atoms

• whether they will dissolve in water

• their radioactive energy

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Chlorine has an atomic number of 17 and an atomic mass of 35. How many neutrons would you find in the nucleus of one CI atom?

• 35

• 17

• 8

• 18

Tags

NGSS.MS-PS1-1

When atoms gain lose electrons, they become negatively or positively charged. These negatively or positively charged atoms are known as:

• ions

• isomers

• isotopes

• unstable atoms

Tags

NGSS.HS-PS1-2

Which statement is NOT true regarding covalent bonds?

• a pair of electrons is shared between each covalent bond

• a covalent molecule contains one or more covalent bonds

• covalent bonds form when an electron is completely lost or gained from an atom

• shared electrons allow an atom to complete its outer electron shell in a covalent molecule

Tags

NGSS.HS-PS1-1