CAX ASB KS5. Water

How many hydrogen atoms are in one molecule of water?

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-1

Which letter represents oxygen?

• A
• B
• C
• D

Tags

NGSS.MS-PS1-1

Because water has a positive and a negative end, and is attracted to other molecules it is called a ______ molecule.

• pole

• polar

• di polar

• non Ionic

The property where water molecules are attracted to other water molecules.

• adhesion
• capillary action
• cohesion
• universal solvent

The property where water can dissolve almost all substances on Earth.

• adhesion
• capillary action
• cohesion
• universal solvent

Why can water have no net charge but have slight charges in different parts of the molecule?

• The oxygen end is slightly negative and the hydrogen end is slightly positive
• The hydrogen end is slightly negative and the oxygen end is slightly positive
• The hydrogen and oxygen ends change in polarity
• Because it is hydrophobic

Tags

NGSS.MS-PS1-1

Attractions between water molecules are called

• Covalent bonds
• Ionic bonds
• Polar bonds
• Hydrogen bonds

Water is polar because...

• The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms.
• The molecule has two poles, at which the it is colder than other regions of the molecule.
• The unequal sharing of electrons gives the water molecule a slight negative charge near its hydrogen atoms and a slight positive charge near its oxygen atom.
• The water molecule is neutral.

Which end of the water molecule has a slightly positive charge?

• the oxygen end
• the hydrogen end
• both ends are slightly positive
• neither end is positive

Water is a universal solvent because it...

• It can be found anywhere
• It freezes when it gets cold
• floats when frozen
• Dissolves most substances

Tags

NGSS.MS-ESS2-4