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Properties of Water
The Scientific Method
Characteristics of Water
Charts, Graphs, and Tables
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100
H2O is Water's Chemical Name, what does this mean in regard to the atoms that make up the molecule?
2 Hydrogen and 1 Oxygen
100
What is a Quantitative Observation? Give me an example.
A quantitative observation is any observation that is represented in numbers or numerical values. For example - 3 apples, 4:05 pm, 22 cards, etc.
100
Water is the Universal Solvent, provide supporting evidence to this claim.
Answers will Vary but may include: Water dissolves any polar substances. Water's unique polarity allows it to break down many molecular bonds. Over time water has been known to break apart everything from rock to sugar.
100
What are 2 types of graphs we have used in class?
A Bar Graph and Line Graph
100
When water is in its solid state (ice) describe its molecular properties, in detail. (3 answers)
The molecules are packed tightly together. Fixed Shape and Volume. Floats in water due to trapped air in the molecule's hexagonal structure (why snowflakes have 6 points :) )
200
Water's unique ability to dissolve all polar substances gives it the nickname ________________?
The Universal Solvent
200
In the sample experiment below, identify the dependent variable. "I am testing the effects of sunlight on the height of plants"
The dependent variable is the height of the plant.
200
Which of the following is not an example of surface tension? 1) Floating a paperclip on water 2) Water drops on the head of a penny 3) A cool-max shirt for sports 4) A mosquito skimming atop a puddle
3) The cool max shirt - demonstrates evaporation not surface tension
200
Provided with the following values, which state had the second highest % of humidity in the last year? State Percentage Kansas 87% Mississippi 42% Georgia 65% Arizona 24%
Georgia
200
If the chemical formula for table salt is NaCl and Na (sodium) carries a positive charge and Cl (Chlorine) carries a negative charge; how then does it make sense that it is polar and will be easily dissolved by water?
Water also carries a + charge on the Hydrogen atoms and a - charge on the Oxygen atom, which means that both table salt (NaCl) and Water (H2O) are polar; allowing the solvent water to dissolve the solute table salt.
300
The tight surface across the bubble atop a penny when water is dropped on it is caused by the interactions of polar water molecules? This property of water is known as ___________________?
Surface Tension
300
What is a Qualitative Observation? Give me an example.
A qualitative observation is an observation that describes the qualities/appearance/characteristics of an object. For example - the red shoes, the beautiful portrait, the friendly dog, etc.
300
Water molecules are attracted to one another through opposite charges, giving them a hydro-philic characteristic. The Molecule H2O is Polar - what atoms carry which charge (+/-)?
The Hydrogen Atoms are + charged The Oxygen Atom is - charged
300
Does solid water (ice) sink or float in liquid water?
Floats due to the air trapped between the molecules packed together in its solid state.
400
Water is Polar and therefore cannot dissolve non-polar substances, give me an example of a non-polar substance.
Oil
400
What is a constant in an experiment, give me an example.
A constant is anything in an experiment that is kept the same. For example, if testing the amount of studying's effect on test scores, the constants may be - the same grade level, same subject, same test, same gender, etc.
400
In Celcius, at what temperature does water freeze and at what temperature does it boil?
Water boils at 100*C and freezes at 0*C.
400
When creating a graph, the x-axis and y-axis should represented with ______________.
Underlined Labels
400
If I was to conduct an experiment to compare the absorbing properties of different towels, what would be my independent variable?
The brand of paper towel.
500
If I said, "Water has a high specific heat" what does that mean?
Water requires a huge amount of heat in order to raise its own temperature at any time - it is stubborn!
500
What is the only factor that can be changed in an experiment called? Why can there only be one?
The independent variable is the only factor that can be changed in an experiment. You can only have one independent variable because if you have more than one factor that is changing, one cannot match the results of the experiment to one specific cause.
500
Without Water, _________ wouldn't be possible.
Life
500

What is Ms. Reilly's Horse's Name?

Fiddlesticks, Utopia, Tori, and Invicta

500
Water is the only substance on Earth that ________________________
Exists and all 3 states of matter naturally. Solid - Ice Liquid - Water Gas - Water Vapor