Question

water makes up between ______ % of all organisms.
the ______ of water means that parts of a water molecule have an unequal pull on electrons.
the hydrogen has a slightly ______ charge.
the oxygen has a slightly ______ charge.
the positive and negative sides are attracted to each other between water molecules.
these weak hydrogen bonds allow water molecules to ______ together.
properties of water:

1. ______: water sticks to water.

*the reason water can form droplets.

1. ______: water can be attracted to other polar molecules.

*sticks to other substances

1. water resists ______ change. it is hard to heat and hard to cool.
2. water ____ as it ____
3. water is a \universal ______\.

*water dissolves more substances than any other solvent
what is a solution?
______ have evenly distributed particles throughout a liquid
a ______ is what is being diluted
a ______ is what does the dissolving

Explanation:

Water constitutes 70 - 95% of organisms. Polarity of water causes unequal electron - pull. Hydrogen has a slightly positive charge and oxygen a slightly negative charge. Hydrogen bonds make water molecules stick together. Cohesion is water sticking to water, adhesion is water sticking to other polar molecules. Water resists temperature change. It expands as it freezes. Water is a universal solvent. Solutions have evenly distributed particles, solutes are diluted, solvents do the dissolving.

Answer:

• 70 - 95
• Polarity
• Positive
• Negative
• Stick
• Cohesion
• Adhesion
• Temperature
• Expands; freezes
• Solvent
• Solutions
• Solute
• Solvent