Unique Water
What is water known as?
The universal solvent.
Give me an example of....surface tension.
Insect walking on water, paper clips on top of the water, drops of water on a penny, etc.
What percentage of water on earth is salty ocean water?
97%
The process that breaks down rock by chemical means is called ______________ ______________.
Chemical weathering.
Which phase of the water cycle is the change from water vapor to liquid?
Condensation
Water is known as this because of its positive and negative ends.
Polar.
Give me an example of...a temperature that could be liquid water (in degrees Celsius)
Any number from 1-99 degrees Celsius
What percentage of water is fresh (including frozen)?
3%
The process that does not change chemical composition, but the way a rock looks is called _________________ _______________.
Physical weathering
What happens when heat is added to ice?
The solid turns into a liquid.
Why does ice float on liquid water?
The solid form of water (ice) is less dense than the liquid form of water.
Give me an example of...physical weathering.
Ice wedging, erosion, tree roots growing through sidewalk, etc.
What percentage of water is fresh and USABLE?
<1%
More productive and dependable farm harvests are the result of —
HINT: Think about watering a large crop.
Irrigation
What is most chemical weathering caused by?
Water (the double agent!)
If I have hot chocolate and a grilled cheese that are the same temperature, how come I can eat the grilled cheese faster than the hot chocolate (the hot chocolate is still too hot)?
Water can contain heat, and release it slowly. It has a high specific heat.
Give me an example of...chemical weathering.
dissolving of limestone, acid rain, oxidation (rust), etc.
What is the freezing point of water (in degrees Celsius)?
0 degrees Celsius.
What was an ancient structure used to transport water from one town to another?
An aqueduct.
Give the 4 step process of ice wedging.
1. Small crack in rock.
2. Water fills crack.
3. Water freezes and expands.
4. Rock breaks further apart.
Name the 4 steps in hydroelectricity.
1. Water is channeled into power plant.
2. The water flows through a turbine.
3. The turbine turns a generator.
4. A generator converts kinetic energy to electrical energy.
Give me an example of...properties of water as a solid.
floats on water, has a fixed volume and shape, molecules look uniform/like a honeycomb, etc.
What is the ratio of hydrogen to oxygen in a water molecule?
2:1 (2 hydrogen, 1 oxygen)
This is a name for water that is used as an energy source to generate power.
Hydroelectricity.
If I have a molecule of sodium (positively charged) and chlorine (negatively charged), which side would oxygen be attracted to?
The sodium (because oxygen is negatively charged).