Chemistry! Hooray!

Chemistry! Hooray!

Monday 29 April 2013

Putt Putt Boat Follow up Report

Putt-Putt Boat Follow Up Report

Goal

To demonstrate your understanding of the Science behind the Putt-Putt Boat.

To begin, please read through the information provided in the following link:


You may also want to review the second video in the Putt-Putt Boat Playlist (follow the link below).


Watch the portion from 1:44 – 2:52. This information will help you understand the Science behind how the engine works.

Please answer the following questions in your report.

1. Draw a “cross-section” diagram of your engine. A cross-section is a diagram that shows what something looks like on the inside; it looks like it has been cut in half. An example of a cross-section diagram is seen below.


Label AND EXPLAIN the following on your cross-section diagram.

a)      All changes of state that may be occurring
b)      At least 3 energy transformations that may be occurring
c)       What thermal energy transfers are taking place (conduction, convection, radiation)

2. Answer the following question in a full paragraph and in as much detail as possible.

In your own words, explain how the Putt-Putt Boat engine works.

Your answer should be no less than half of a page and no more than one full page typed. Remember to review the information on the link!

3. Personal Response

In this section, please provide a personal response to the following question about your experience building the Putt-Putt Boat.

What was your greatest challenge when working on this project and how did you overcome this challenge?

Consider the following topics for discussion; you do not have to write about these topics - write about whatever you feel was YOUR greatest challenge.

  • Technical problems you encountered and how you solved them
  • How well your group worked with each other and how you distrubuted the work
Due Date: Friday May 10th, 2013

Success criteria will follow.

Tuesday 9 April 2013

Grade 7 Radiation Notes and Eureka Video

Radiation

·        Radiant energy is the transfer of energy by invisible waves given off by the energy source
·        These invisible waves are called infrared waves (a type of electromagnetic wave from the sun)
·        Infrared waves are given off by all heat sources, including you
·        Heat is radiant energy from the sun that reaches your skin
·        Radiant energy warms up objects when the waves of radiant energy come into contact with matter making the particles vibrate faster


Grade 7 Convection Notes and Eureka Video


Convection

·        Convection - The transfer of thermal energy by moving particles in fluids
·        As the particles of fluids (gases and liquids) are heated, they move faster and expand; this expansion makes the fluids less dense so they rise
·        When warmer fluids rise, cooler fluids move downwards; this creates a “convection current”
·        The convection current continues in a pot of soup because the warmer soup particles in a pot cool when they make contact with the air and then sink. These particles are heated again once they meet the bottom of the pot.
·        Convection currents help heat your home through your furnace heating system.

Thursday 4 April 2013

Grade 6 Create a Creature Success Criteria


Create a Creature Success Criteria

·       A minimum of 3 invertebrates are researched
·       Physical characteristics relate back to the invertebrates you chose – explain what parts of your 3 invertebrates are included in your new species
·       The drawing resembles the invertebrates researched
·       All information about the invertebrates is accurate
·       The habitat relates to chosen invertebrates (doesn’t have to be all three)
·       The food your creature eats should relate somewhat to the invertebrates chosen e.g., a ant/fly/snail won’t eat a cow
·       A reasonable explanation for adaptations is included
·       Poster is organized with a title, subtitles, printed text and a neat drawing
·       Include a classification of the species – can be creative
·       Date and name
·       Use proper scientific terms
·       Write in a clear font
·       Include your sources!

Wednesday 3 April 2013

Grade 7 Chapter 10 Study Guide


Please review the following for the text on April 15th:

Section 10.1

  • The 10 forms of energy
  • Examples of energy transformations

Section 10.2

  • Understand the difference between thermal energy, temperature, and heat
  • Review examples of renewable and non-renewable energy
  • Key Terms: fossil fuels, waste heat

Section 10.3

  • Review the 6 changes of state
  • How does the particle theory explains changes of state? (page 296)
  • Heat can affect the volume of solids, liquids, and gases - how does the particle theory explain this?
  • Provide examples of how we apply the knowledge of expansion and contraction of solids, liquids and gases; e.g., we leave spaces at the top of bottles to allow for the expansion of liquids if they are heated.

Section 10.4

  • Review the three types of heat transfer; conduction, convection, and radiation and provide examples of each
  • How do we apply our understanding of the three types of heat transfer, e.g, we wear oven mitts when taking hot things out of the oven.


Grade 7 Eureka Conduction Video

Grade 7 Conduction Notes


Conduction

·        The transfer of heat through a solid or between a solid and another solid, a liquid, or a gas that is in contact with it
·        Conduction can also occur from liquid to solid and gas to solid
·        Conduction always occurs from a warmer region to a cooler region
·        Conduction occurs when warmer particles bump into cooler particles making them vibrate faster
·        Metals are better heat conductors than non-metals because they have free electrons

Grade 7 Expansion and Contraction Worksheet Answers

Solids Expanding and Contracting in our Daily Lives

1.   Why is it important to place gaps at regular intervals in sidewalks?

In the summer the sidewalk expands and in the winter it contracts. The gaps allow space for the expansion and contraction so the sidewalk doesn’t crack.

2.   Steel bolts used to connect things together are sometime heated and put in place while they are still hot. Why?

When hot, the length of the bolts increases. So when they cool,
they pull together the parts they are fastening.

3.   Concrete and steel expand at almost the same rate. Explain why this is important in the construction of tall buildings.

If they did not expand and contract at the same rate, there would be many cracks in the building and it might fall down.

Gases Expanding and Contracting in our Daily Lives

1.   Explain how a hot air balloon is lifted from the ground.

When the gas particles inside the hot air balloon are heated, they expand and some escape from the bottom of the balloon. This causes there to be fewer air particles inside the balloon then outside the balloon. The less dense hot air will float on more dense cold air so the balloon rises.

c) Once in the air, the burner is turned off and the balloon drifts along with the wind. What will eventually happen to the air inside the balloon?

Cooler air will enter the balloon and the air inside will become more dense. The balloon will begin to go down.

 Liquids Expanding and Contracting in our Daily Lives

1.   A bowl of hot soup was left on the table to cool. After a few minutes, the amount of soup in the bowl appeared to have decreased? Why?

Some of the soup may have evaporated or the soup may have cooled down and there seems to be less soup because the particles become closer together (contract) and become denser.

2.   When manufacturers pack liquids into bottles and jars, they leave a small space at the top before putting on the lids. Why?

The space allows for the liquid to expand without causing the bottle to break.

3.   Mercury expands and contracts faster than alcohol. Which liquids would be better in a thermometer?

Mercury will tell the temperature faster, but it will also contract faster so it will drop more quickly making it harder the read the temperature. Also, mercury is poisonous!
 

Tuesday 2 April 2013

Grade 7 Chapter 10 Test Monday April 15th


A study guide will follow.

Grade 6 Biodiversity Test #1


The first test of the Biodiversity unit will take place on Tuesday April 9th.

Please review the following:

1. How species are classified; (e.g., Kingdom, Phylum, Class, Order, Family, Genus, Species) and the five Kingdoms

2. The 6 "Sub-Phyla" of Invertebrates and their basic characteristics; Arthropods, Mollusks, Echinoderms, Worms, Cnidarians, and Sponges (Porifera)

3.  The 3 classes of Arthropods and their basic characteristics; insects, crustaceans, arachnids

4. Animal Adaptations

Additional Key Terms to Review

a) bilateral and radial symmetry
b) Natural Selection
c) Evolution
d) warm blooded/cold blooded animals

Grade 6 Create a Creature Project


The due date for the Create a Creature Project is April 12th.

The Success Criteria is forthcoming.

Grade 7 Putt Putt Boat Materials List


The following materials must be gathered by your team prior to building your Putt Putt Boat:

1. One or more undented standard size pop cans (you may need several if you make a mistake)
2. One 2 Litre milk/juice carton
3. One shoebox for for keeping your materials safe

Please have these materials in school no later than April 12th.