Energy Levels

A food pyramid represent the relative amount of energy in trophic levels. Which of the following correctly shows a food pyramid?

• A

• B

• C

• D

Tags

NGSS.MS-LS2-3

If these organisms were arranged in a food pyramid, which organism would have the least amount of total energy available?

• coyote

• insect

• lizard

• shrub

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Which of the following would be the most likely effect, if there were a sudden increase in the cricket population?

• There would be a decrease in the small bird population.

• There would be a decrease in the grass/flowers population.

• There would be a decrease in the mice population.

• There would be an increase in the grass/flowers population.

Tags

NGSS.HS-LS2-1

NGSS.HS-LS2-2

NGSS.HS-LS2-6

They are imaginary regions (places) around the nucleus in which the electrons move according to their energies.

• Atom

• Element

• The energy levels

• Molecules

The first energy level is ....................

• K

• L

• M

• N

The second energy level is saturated with ................ electrons.

• 2

• 8

• 18

• 32

The fourth energy level is saturated with ................ electrons.

• 2

• 8

• 18

• 32

The maximum number of energy levels in the heaviest known atoms equals (9).

• True

• False

How are electrons arranged in an atom?

• In groups of five

• In energy levels

• By color

• By shape

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the maximum number of electrons that can occupy the third energy level in an atom?

• 8

• 18

• 32

• 50