Chemistry! Hooray!

Chemistry! Hooray!

Tuesday, 16 October 2012

Practise Quizzes for Test


Here are 3 additional practise quizzes for the test this Thursday.


http://www.sciencesource.ca/quizzes/quiz_01_1SLjG2.htm

http://www.sciencesource.ca/quizzes/quiz_01_2vRCiM.htm

http://www.sciencesource.ca/quizzes/quiz_01_35YRu2.htm

Have fun!

Study Guide for Grade 7 Test on Thursday



Study Guide for Grade 7 Test

Key Terms

□   abiotic
□   bacteria
□   biotic
□   carnivores
□   chlorophyll
□   community
□   consumers
□   decomposers
□   detritivores
□   ecosystem
□   food chain
□   habitat
□   herbivores
□   nutrients
□   omnivores
□   organic matter
□   oxygen
□   photosynthesis
□   populations
□   predator
□   prey
□   producers
□   scavengers
□   species

·        Examples of biotic – biotic, abiotic – biotic, and biotic – abiotic interactions
·        The process of photosynthesis
·        The five basic needs of living things
·        The roles of producers
·        Predator-prey relationships
·        Food chains

Friday, 12 October 2012

Grade 7 Notes Section 2.1


The Transfer of Energy in Ecosystems

Energy Transfer

  • Food chains show how energy is transferred through an ecosystem
  • The energy transfer in ecosystems begins with the Sun and producers

For example:

Sun                  Producers                     Herbivore and Omnivores                 Carnivores and Omnivores

  • Only stored energy is transferred to the organisms at the next level
  • About 10% of energy consumed by an organism is stored in its tissues
  • A lot of energy consumed is used for living, growing, and given off as heat

Types of Consumers


Primary Consumers
Secondary Consumers
Tertiary Consumers
What they eat
Producers
Primary Consumers
Secondary Consumers
Also known as
Herbivores and Omnivores
Carnivores and Omnivores
Carnivores and Omnivores
Examples
Rabbits
Cows
Foxes
Raccoons
Owls
Wolves, Bears

Energy Pyramids
·        Energy pyramids show the amount of energy transferred in a food chain
·        There are fewer organisms as you  move up the pyramid
·        Only 10% of energy is passed on to the next level
·        Less energy passed on means fewer organisms

Food Webs
·        Food webs show interconnected food chains
·        They show a complex network of feeding relationships
·        More accurate model than a simple food chain

Tuesday, 9 October 2012

Grade 7 Chapter 1 Test - Thursday October 18th


This test will cover section 1.1, 1.2, and 1.3 in the textbook.

Try these online practise quizzes!

http://wps.pearsoned.ca/ca_school_ist7-8preview/99/25479/6522653.cw/content/index.html

http://www.sciencesource.ca/resources/gr7_matchquiz_ch01/

http://www.sciencesource.ca/resources/gr7_labelquiz_ch01/

NOTE THE TEST IS NOW ON THURSDAY!

Grade 7 Sampling Quiz Thursday October 11th


You will be asked 5 multiple choice questions relating to our investigation. You will also be required to perfrom calculations similar to those you did in class.

Grade 7 Ecosystem Investigation Outline - Due Friday October 12th



Ecosystem Investigation

Group Submission

Please submit the following in a group report:

  1. Your completed recording sheet – Please rewrite a clean version, not the sheet that was used outdoors

  1. A sheet of completed calculations

  1. The Problem (see page 16 in Sciencepower 7)

  1. A list of materials you used

  1. Please include the answers to the following questions in complete sentences:

a.       Aside from grass, which organism was the most common? Why do you think it was so common?

b.      List 3 factors (abiotic or biotic) that allow the plants to survive in the lawn ecosystem.

c.       List 3 factors (abiotic or biotic) that allow the animals to survive in the lawn ecosystem.

d.      What scavengers, detritivores, and decomposers did you find in the ecosystem? What role do they play in keeping the ecosystem healthy?

e.      Explain what would happen in your lawn ecosystem if all the producers (plants) were removed from the site?

f.        Explain what would happen in your lawn ecosystem if all the consumers (insects, animals) were removed from the site?

g.       Explain what would happen in your lawn ecosystem if only the scavengers, detritivores and decomposers were removed from the site?


The group submission is due: _____________________________________________

Independent Submission

Instructions:

a)      Each student must work on the following questions independently
b)      The submitted work must be neatly written or typed
c)       All answers must be written in detailed sentences where possible

1.       Research some biotic factors (plants and animals) that are part of ecosystems in Southern Ontario. You can begin here:


a.       List 5 producers (think of common plants and trees)
b.      List 5 herbivores
c.       List 2 omnivores
d.      List 3 carnivores
e.      List 1 scavenger
f.        List 1 detritivore
g.       List 1 decomposer

2.       Create 5 food chains based on your list in question 1. The food chains should be no less than 3 organisms in length.

3.       What would happen to a food chain if one of the parts were removed? Use one of your food chains in question 2 to help explain your answer.

4.       Based on what you know about ecosystems, list as many abiotic factors in ecosystems as you can.
5.       Using your lists of biotic and abiotic factors, describe the following:

a.       2 biotic-biotic interactions
b.      2 abiotic-abiotic interactions
c.       2 biotic-abiotic interactions


The independent submission is due: _____________________________________________

Thursday, 4 October 2012

Grade 6 Space Test Study Guide

What to study for the test?

Test Part 1

Seasons (why they occur?)
Day and night (why they occur)
·        Rotation (length)
·        Revolution (length)
Phases of the moon – types, the cycle
·        position of the Sun, Earth and Moon during full moon, quarter moon, and new moon

Test Part 2

Sun (Parts, how it makes energy)
Tides
Lunar and Solar eclipses
Physical features of the moon (rills, craters, highlands, maria, valleys)
Define Planet
The planets in our solar system