What email address or phone number would you like to use to sign in to Docs.com?
If you already have an account that you use with Office or other Microsoft services, enter it here.
Or sign in with:
Signing in allows you to download and like content, and it provides the authors analytical data about your interactions with their content.
Embed code for: Lesson 2 worksheet
Select a size
Lesson 2 worksheet: page 18-35
Approximately how much of the Earth’s surface is covered in water? __________________
What is a “Basin”?
What percentage of all water on Earth is salty? _____ What percentage is fresh? _____ Of all the freshwater, only a portion is accessible/drinkable. Why isn’t the freshwater completely accessible/drinkable?
Water is the largest component of living organisms. Approximately what percentage of an organism’s mass is water? _______
There are 4 “spheres” listed in the textbook as components of the Earth system. What are the 4 “spheres” and what does each one refer to?
What are renewable and nonrenewable resources? Give examples of renewable and nonrenewable resources from the ocean.
If something is renewable, does that mean it will last indefinitely (forever)? Why or why not?
Using pages 22-26 of your textbook, complete the following vocabulary section.
Word bank: Tap Water / Dry Ice / Salt water / Ice / Distilled Water
Solid carbon dioxide commonly used to keep foods cold during shipping (used in lab to freeze water)
Water in the solid state
Pure water with all minerals and substances removed
Fresh water from a faucet, which has been treated to kill bacteria and harmful substances
Water that contains dissolved salts
Draw a line to match each term to its correct description
Sublimation _____The temperature at which a liquid begins to change into a solid
Freezing point _____The temperature at which a liquid begins to change into a gas
Melting point _____The temperature at which a solid begins to change into a liquid
Boiling point _____The process of changing from a solid to a gas
Density _____The attraction between molecules at a liquids surface
Surface tension _____The amount of mass in a given volume of a substance
Complete the chart below as you read through pages 26-29.
Example or diagram/picture
Polar Covalent bond
Polar Covalent molecule
What kind of charge (Positive, negative, or neutral) does each particle have?
Electron: :______________ Neutron: :______________ Proton:______________
How many atoms make up a water molecule? ____ What are they? _____________________ What is the chemical formula for water? ___________
Water is a polar covalent molecule. Describe in your own words what this means.
Since water is a polar covalent molecule, it is able to form ____________ bonds. Although relatively weak, these bond are one of the most important characteristics of water. Draw a diagram illustrating how these bonds form (see figure 2.15)
Most substances are denser in their solid form, and less dense in their liquid form. Why isn’t this true for water?
Use pages 30-31. Phase Change Diagrams: use the diagram below to answer the following questions.
What is the independent variable for this experiment? ________________________
What is the dependent variable? ________________________
What is the melting point? ________________________
What is the boiling point? ________________________
When adding heat to a solid, will the temperature rise, lower, or remain constant? ________________________
When adding heat to a liquid that is currently boiling, will the temperature rise, lower or remain constant? ________________________
When removing heat from a liquid that is currently freezing, will the temperature rise, lower or remain constant? ________________________
When removing heat from a liquid, will the temperature rise, lower, or remain constant? ________________________
In your textbook, answer question #6 on page 31 here: Answer #4 on page 39 here:
Using what you know about the differences in freezing points, why are glaciers and icebergs always considered freshwater sources, even though they’re most often found in salt water?
Use pages 33-37: Density and Buoyancy. For calculations, Show your work.
Cooking oil has a mass of 22.75 g and a volume of 25 mL. What is its density?
A piece of lead has a mass of 170 g and a volume of 15 cm3. What is its density?
A helium balloon has a mas of 0.036 g and a density of 0.00018 g/cm3. What is the volume?
What is the density of fresh water? __________ What is the density of Salt water? ___________
Antifreeze (Ethylene Glycol)
Which substances in the table above will sink in fresh water?
Which will float?
Which substance would float in salt water but sink in fresh water?
What is buoyancy?
What is the relationship between density and buoyancy? (hint-choose the correct word: the more/less dense something is, the more buoyant it is).
What is the relationship between displacement and buoyancy?
How are large objects like ships and massive whales able to float?
Organisms have features that assist them with floating and sinking and with preventing themselves from moving up and down, which is called maintaining ________________ ________________.
How are some phytoplankton able to maintain [answer to #23]?
How does Sargassum float on the ocean’s surface?
Which do you think is easier to swim in, salt water or fresh water? (In which would you be more buoyant and why?)
A note about how I will be grading this worksheet. There will be 3 formative grades:
1) Intro to water: #1-15
2) Phase Change: #16-18
3) Density and Buoyancy: #19-28
Name:_______________________________________________________ Block:_______ Date_______s to change into a liquid
Use pages 33-37: De