WATER!

The molecular formula for water is

• W
• H2O
• 2HO
• H₂O

Tags

NGSS.MS-PS1-1

Which is NOT a property of water that helps or bodies function properly?

• Water is a natural antibiotic substance
• Water dissolves many substances
• Water cools when it evaporates
• Water can hold heat (maintain temperature)

If you made blue paint by dissolving dry blue paint powder into water, the liquid blue paint you made is a

• ion
• solute
• solution
• concentration

If you dissolve blue paint powder into water, the paint powder is the...

• ion
• solute
• solution
• solvent

Water dissolves ionic compounds, like NaCl, because water molecules...

• are non polar
• have a pH value of 14
• Have partially charged ends that interact with ions
• do not contain atoms

Which statement best describes an effect of the low density of frozen water on a lake?

• When water freezes it contracts, decreasing the water level in the lake.
• Water in a lake freezes from the bottom up
• Water removes thermal energy from the land, causing the lake to freeze
• When water in a lake freezes, it floats and provides insulation for the organisms below

Tags

NGSS.MS-LS2-4

Which combination when referring to salt water is correct in terms of solutes/solvents?

• solute: table salt solvent: saltwater
• solute: table salt solvent: water
• solute: water solvent: table salt
• solute: saltwater solvent: water

How many hydrogen bonds can one water molecule make?

• 6
• 3
• 4
• 2

Tags

NGSS.HS-ESS2-5

Water is cohesive, the molecules are attracted to one another because of hydrogen bonds. This attraction helps create...

• surface action
• surface tension
• ice
• solvents

A water molecule is polar. Its bent shape results in the following...

• slightly positive charge on hydrogen and slightly negative charge on oxygen
• slightly positive charge on hydrogen and slightly  positive charge on oxygen
• slightly negative charge on hydrogen and slightly positive charge on oxygen
• no change because its neutral