• I will be able to:
• Describe the structure of
water.
• Describe the four main
properties of water.
• Describe Water’s role /
importance on Earth.
• Pick up handout and half
sheet.
• Copy homework.
• Work on the heat transfer
review.
• Log on to laptop.
• ES.0.7 Energy and Heat Transfer RHW Quiz due Tonight
• ES. Intro Test Part 2 (ES.0.5-ES.0.7) Monday
• ES.0.8 Properties of Water RHW Quiz due 10/5
I will be able to describe the structure of water and
the properties of water.
What is the Structure of Water?
• Water Molecule
– Made up of atoms.
– Atoms join to form molecules
– H20
• Hydrogen = ___ atoms
• Oxygen = ___ atoms
I will be able to describe the structure of water and
the properties of water.
What Makes Water a Polar Molecule?
• Water Molecule
– Polarity- anything that has one
positive charge at one end
and a negative charge at
another.
– Water is a Polar Molecule
• Hydrogen= ____ Charge
• Oxygen = ____ Charge
– Negative atom is attracted to
the positive atom.
I will be able to describe the structure of water and
the properties of water.
I will be able to describe the structure of water and
the properties of water.
What are four properties of Water?
• Polarity Affects:
– Properties of water.
– How water molecules interact
with one another or other
molecules.
•
•
•
•
Cohesion
Adhesion
Specific Heat
Solvents
I will be able to describe the structure of water and
the properties of water.
What are four properties of Water?
• Cohesion
– A property that holds
molecules together.
– Water molecules are polar
and are tightly held together.
I will be able to describe the structure of water and
the properties of water.
What are four properties of Water?
• Adhesion
– A property that holds
molecules of different
substances together.
– Other polar substances attract
water molecules.
– Wettable, water adheres or
sticks..
I will be able to describe the structure of water and
the properties of water.
What are four properties of Water?
• Specific Heat
– Energy needed to heat a
substance by a particular
amount.
– Water = High Specific Heat
• Particles when heated:
– Move faster
– Spread apart.
• Requires a lot of energy to
separate the polar molecules.
I will be able to describe the structure of water and
the properties of water.
What are four properties of Water?
• Solvents
– A liquid that dissolves
substances.
– Water = Universal Solvent
• Dissolves many
substances.
• Solute- the substance
dissolved.
I will be able to describe the role and importance
of water on Earth.
What is Water’s Role on Earth?
• Water on Earth
– Only planet with water in our
solar system.
– Exists in all 3 States and can
change state.
• Most is liquid
I will be able to describe the role and importance
of water on Earth.
What is Water’s Role on Earth?
• Water on Earth
– Solid (ice / snow) (H2O)
• Expands when frozen.
• Less dense, floats in water.
I will be able to describe the role and importance
of water on Earth.
What is Water’s Role on Earth?
• Water on Earth
– Liquid- Rain, Water (H2O)
• Precipitation
• Gravity causes it to flow
down hill.
I will be able to describe the role and importance
of water on Earth.
What is Water’s Role on Earth?
• Water on Earth
– Gas- Water Vapor (H2O)
• Invisible in the
atmosphere
• Forms clouds.
I will be able to describe the role and importance
of water on Earth.
What is Water’s Role on Earth?
• Water on Earth
– ___% Freshwater
– _____ % of the
freshwater is
Frozen
I will be able to describe the role and importance
of water on Earth.
What is Water’s Role on Earth?
• Water on Earth
– Reshapes the Surface
• Water flows
• Weathering =
– Breaking up rock.
• Erosion =
– Movement
– Influences Weather
•
•
•
•
Water Cycle
Clouds
Precipitation
Storms
I will be able to describe the role and importance
of water on Earth.
What is Water’s Role on Earth?
• Water on Earth
– Supports Life
• Cells = 70% water
• Biological processes
– Regulates temperature
– Transports substances.
I will be able to describe the role and importance
of water on Earth.
What is Water’s Role on Earth?
• Water on Earth
– Need clean water to drink
to survive.
– Contaminated water is a
major health problem.
I will be able to describe the role and importance
of water on Earth.
What is Water’s Role on Earth?
• Water on Earth
– Water is a non-renewable
resource.
– Clean water is needed for:
• Drinking
• Bathing
• Growing food.
I will be able to describe the role and importance
of water on Earth.
What is Water’s Role on Earth?
• Water on Earth
– 20% Used for Industrial
Processes.
• Manufacturing
• Agriculture
• Generating Electricity
– Cooling power stations
– Hydroelectric dams
• I will be able to:
• Describe the structure of
water.
• Describe the four main
properties of water.
• Describe Water’s role /
importance on Earth.
• Copy homework.
• Log on to Laptop, Take Sci
Design Pre-Test in the
ES.0.8 Folder
• ES. Intro Test Part 2 (ES.0.5-ES.0.7) Monday
• ES.0.8 Properties of Water RHW Quiz due 10/5
• I will be able to:
• Describe the structure of
water.
• Describe the four main
properties of water.
• Describe Water’s role /
importance on Earth.
• Copy homework.
• Log on to Laptop, Take Sci
Design Pre-Test in the
ES.0.8 Folder
• ES. Intro Test Part 2 (ES.0.5-ES.0.7) Friday
• ES.0.8 Properties of Water RHW Quiz due 10/5
I will be able to determine if a penny holds more
Isopropyl Alcohol or freshwater.
Cohesion / Adhesion Lab
• Pre-Lab Questions
– Determine the number of drops that can be placed on
each penny (fresh water / Isopropyl Alcohol)
– 1. Problem?
• Will a penny hold more freshwater or Isopropyl Alcohol?
I will be able to determine if a penny holds more
Isopropyl Alcohol or freshwater.
Cohesion / Adhesion Lab
• Pre-Lab Questions
– Determine the number of drops that can be placed on
each penny (fresh water / Isopropyl Alcohol)
– 12. Hypothesis?
• ~If drops of fresh and alcohol are placed on a penny, then
a penny will hold more drops of _________________than
__________.
– 3. Independent Variable
– 4. Dependent Variable
– 5. Control Group
I will be able to determine if a penny holds more
Isopropyl Alcohol or freshwater.
Drops of Water on a Penny
• Procedure:
– Use the eyedropper (pipette) to
drop fresh or Isopropyl alcohol
onto the surface of the penny
(heads side) drop by drop.
– Count the number of drops that
fit on the penny before the water
spills off the penny.
– Complete three trials. (switch off
with your partner)
– Calculate the average for all four
trials.
– Answer Analysis Questions.
I will be able to describe the states of water that
occur on Earth and the role of water.
Diagram:
• Identify:
– Heat transfers: Conduction,
Convection
– Explain how convection works.
I will be able to describe the states of water that
occur on Earth and the role of water.
Diagram: