From Molecules to Organisms

Water and hydrogen peroxide are both liquids and both contain hydrogen and oxygen molecules; however, their properties and uses are very different because of their molecular structure. Water is stable, while hydrogen peroxide is reactive. Models of the two molecules are pictured below. In the models, the red spheres represent oxygen atoms and the white spheres represent hydrogen atoms.

• Water has two oxygen atoms while hydrogen peroxide has only one.

• There are two oxygen atoms bonded together in hydrogen peroxide while water only has one.

• Water and hydrogen peroxide both contain two molecules of oxygen.

• Water has half as many total atoms as hydrogen peroxide.

• The hydrogen peroxide atom has a different shape because it has an extra atom in its molecule.

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NGSS.MS-PS1-1

Which model is the water molecule?

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NGSS.MS-PS1-1

Which model is the hydrogen peroxide molecule?

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NGSS.MS-PS1-1

Which model is the hydrogen gas molecule?

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NGSS.MS-PS1-1

Which piece matches Molecule X?

• Piece 1

• Piece 2

• Piece 3

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NGSS.MS-PS1-1

Which piece matches Molecule Y?

• Piece 1

• Piece 2

• Piece 3

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NGSS.MS-PS1-1

What do all the cells in the model have in common?

• Endoplasmic Reticulum

• Flagellam

• Nucleus

• Cell Membrane

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NGSS.MS-LS1-2

NGSS.MS-LS1-1

Which of the cells shown in model is a prokaryote(unicellular)?

• red blood cell

• bacterium

• muscle cell

• nerve cell

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NGSS.MS-LS1-1

What structure would you find in a plant cell that you would not find in an animal cell?

• Gogli Body

• Nucleus

• Mitochondria

• Chloroplast

Which of the following is found in both a cell and a virus?

• Genetic Material

• Cell membrane

• Nucleus

• Mitochondria