Water: The Wonderful Molecule Study Guide
Define the following and create a model for each:
Atom
Makes up everything and is the smallest unit of matter
Chemical Symbol
An abbreviation or shortened version of the name of an element
Element
A substance that is pure and found on the periodical table
Compound
At least two elements combined to make a new substance
Property
Characteristics of something
Capillary Action
The ability for water to “crawl” plants are able to get water from their roots to leaves because of capillary action
Surface Tension
Water’s ability to stick together to form a barrier on top of itself. Insects are able to stand on top of water because of this.
Solubility
The ability for water to dissolve substances. Organisms that live in a pond are able to survive because oxygen dissolves in water
Density
Objects can float or sink depending on their density. Ice floats on top of water because it is less dense.
Explain why some substances can fit through a filter but others cannot
Some substances can fit through a filter because the molecules are smaller than the filters openings, others cannot because the molecules are too large to fit in the opening
Explain why direct potable reuse needs several filters
Direct potable reuse needs several filters because all molecules are different sizes
Explain how you know that water has a charge
I know water has a charge because when a balloon is charged it attracts water.
What are the three states of matter? Draw a model showing them on the molecular level.
The three states of matter are solid liquid and gas
What is the purpose of the periodic table?
The purpose of the periodic table is organize the elements by characteristics or properties
Name some familiar elements on the periodic table and what you know about them.
How many elements and atoms are in the following compounds?
NaOCl
Atoms: 3
Elements: 3
H5Bi04
Atoms: 10
Elements: 3
NaCl
Atoms: 2
Elements: 2
C6H12O6
Atoms: 24
Elements: 3
Use the following compounds to answer the questions:
Which compound has the most atoms?
Ammonia and Hydrogen Peroxide
How many elements does each compound have?
They all have 2
What elements are found in the compounds:
Water: Hydrogen and Oxygen
Carbon Dioxide: Carbon and Oxygen
Ammonia: Nitrogen and Hydrogen
Hydrogen Peroxide: Hydrogen and Oxygen
What is the difference between the compounds CO and Co?
Co is the element Cobalt and COis the compound carbon monoxide
What about Cl and Cl2?
Cl is one chlorine atom and Cl2 is a compound/molecule made of 2 chlorine atoms
Name the following phase changes
Dry ice turning from a solid to a gas
Sublimation
Water turning from liquid to a gas
Evaporation
Jello turning from a liquid to a solid
Solidification
Finding frost on your windshield even though it has not snowed.
Deposition
A ring of water on the table after you have set down your drink
Condensation
Explain what happens to particles as a substance heats up and as it cools down. Draw a model to show what is happening
As a substance heats up the bonds weaken and the particles begin to speed up and as a substance cools down the bonds strengthen and the particle slow down