Class Notes (837,019)
Canada (510,044)
Lecture 1

EARTHSC 2WW3 Lecture 1: chapter 1
Premium

3 Pages
82 Views
Unlock Document

Department
Earth Sciences
Course
EARTHSC 2WW3
Professor
johnmaclachlan
Semester
Spring

Description
What is water? water is not an element o it is a compound made of 2 elements 2 hydrogen atoms and 1 oxygen atom Properties include o strong covalent bond o weak hydrogen bond hydrogen bonds enable water to act as an excellent solvent o also means that water is present in liquid form over most parts of the earths surface Physical Properties Thermal properties o Most Dense at: 4 degrees Celsius o Upon freezing Expands by 9 hydrogen bonds form a strong structure o Specific Heat: the highest of any liquid 4200 joules of energy Second to ammonia o Evaporation is a crucial part of the water cycle and invisible water vapor is a very powerful Greenhouse Gas water vapor acts as a good greenhouse gas Surface Tension o common to liquid, not unique to water o Why it happens? molecules are attracted in all directions At the surface of the liquid, no molecules outside so molecules are only pulled inwards o Without Gravity water would form into a sphere force pulling the liquid inwards is greater than the gravitational force of most objects o Surface tension is greatest of all liquids that are not metals o What does Detergent do? makes the water reduce its surface tension and therefore allows a substance to be wetted by spreading water o Capillary Actions: water can flow upwards gravity doesnt matter virtual for plant growth Chemical Properties o excellent solvent o pure water doesnt occur readily in nature as it dissolves with other substances that it comes in contact with Will dissolve a substance if molecules interact Salt (NaCl) water can rip this apart Substances that are electrically neutral (oil) dissolve poorly in water Water and Its Importance for Life Carbon Dioxide + water + light energy glucose + oxygen + water Plants need water for food and at times, structural support Humans are made up of 70 water
More Less

Related notes for EARTHSC 2WW3

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit