Energy and Matter in Ecosystems

Originally, the hypothesis that explained how plants grew and gained mass in their lives was

• absorbing material through their roots

• spontaneous generation

• breathing in CO2 from theor leaves

• changing sunlight into matter

Tags

NGSS.MS-LS1-5

NGSS.MS-LS1-6

Which of these makes up the largest part of our atmosphere?

• oxygen

• water

• nitrogen

• carbon dioxide

Which of these is not a molecule?

• oxygen gas (O2)

• carbon (C)

• water (H2O)

• Carbon dioxide (CO2)

Tags

NGSS.MS-PS1-1

Which of these does not represent matter?

• heat from the sun

• a lake filled with water

• an atom of gold

• air from the stmosphere

The nucleus of an atom contains

• Electrons, protons, neutrons

• neutrons only

• protons only

• protons and neotrons

Tags

NGSS.MS-PS1-1

Jean Baptiste von Helmont did an experiment using a 5 pound willow tree which he planted in 200 pounds of dry soil. He measured the soil and the tree after 5 years and founds these changes. Select all that apply.

• the mass of the soil decreased slightly

• the tree gained a significant amount of mass

• the mass of the soil decreased significantly

• neither the tree or the soil significantly changed in mass

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-3

_____ are located outside the nucleus of an atom.

• protons

• neutrons

• protons and neutrons

• electrons

Tags

NGSS.MS-PS1-1

Most of the mass of an adult tree comes from

• sunlight

• water and oxygen

• carbon dioxide from air

• soil

Tags

NGSS.MS-LS1-6

Energy _____ and matter _____.

• flows, cycles

• cycles, flows

• cycles, cycles

• flows, flows

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

NGSS.MS-PS3-4

Earth is a closed system to which of the following forms of matter?

• water

• nitrogen

• carbon

• all of the above

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-4