8.2. Chemistry

Unit 2 Chemistry

Complete all of the sections below including watching videos, answering questions and doing activities.
ALL questions must be answered in COMPLETE SENTENCES and handed into your teacher.

In this section we'll think about the following question:
How does kinetic energy help explain the states of matter?

Download the section questions, hand them in to your teacher when you're done.

Textbook Work:

Textbook Work:

Gas Chamber Activity
Follow these instructions below and answer the questions on a piece of paper then hand it in to your teacher:

Download the Gas Properties simulator to the right(note: in order to run this program your computer must have Java)
Use the pump once to put some heavy gas into the chamber
Change the 'Gas in Pump' setting to 'Light Species'
Use the pump once to put some light gas into the chamber
What do you notice about the light gas versus heavy gas? (Hint: speed)
Now use the 'Heat Control' to 'Remove' heat from the chamber (ie. make colder).
What do you notice about the speed of the particles?
How use the 'Heat Control' to 'Add' heat to the chamber (ie. make warmer).
What do you notice about the speed of the particles?
Use your knowledge of the Kinetic Molecular Theory to explain what is happening to the gas particles when you remove and add heat. (Please write your answer in complete sentences)

States of Matter Activity
Follow these instructions below and answer the questions on a piece of paper then hand it in to your teacher:

Open the States of Matter simulator to the right
Select the state 'Solid'
What do you notice about the particles?
Select the state 'Liquid'
What do you notice about the particles?
Select the state 'Gas'
What do you notice about the particles?
Return to the state 'Solid'
Use the 'Heat and Cool' control at the bottom to increase the 'Heat' (note: you will have to hold the heat button to increase the temperature)
As you hold the 'Heat' on the solid state will change into the liquid, then gas state. How do you know that the state has changed?
How can you change this gas back into a liquid state and/or solid state?

In this section we'll think about the following question:
If atoms are invisible to the naked eye, how do we know they exist?

Download the section questions, hand them in to your teacher when you're done.

Go to the BBC article by Chris Baraniuk. As you read answer the following questions:

Can you see an atom under a microscope?
What makes an object visible under a microscope?
Do atoms deflect light?
What Greek word does the word 'atom' derive from and what does it mean?
What three parts are atoms made up of?
How does the article describe an atom? (hint: sun)
If subatomic particles (ex. electrons) are so small, how do we know they're there?
JJ Tomson discovered the electron using an experiment called the Cathode Ray Tube. Watch the video below to see how this experiment was conducted. This experiment is extremely clever, and a little tricky to understand, so don't stress if this sounds like gibberish to you.
Are atoms solid little pieces of matter?
Ernest Rutherford contributed to the discovery of the proton. Watch the video below to see how this experiment was conducted.
You may stop reading the article at this point.