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Nelson Education > School > Elementary Science > Science & Technology 7 > Student Centre > At-Home Activities > Unit 5
 

At-Home Activities

UNIT 5: INTERACTIONS WITHIN ECOSYSTEMS

  Getting Started
  5.1  Bear Necessities
  5.2  The Organization of Life
  5.3  Adaptations for Survival  
  5.4  A Landfill Ecosystem
  5.5  What Belongs in a Landfill?
  5.6  Cycling of Matter
  5.7  Microbes in Ecosystems 
  5.8  Nutrient Recycling and Plant Growth
  5.9  Field Biologist 
  5.10 Ecological Pyramids
  5.11  Pesticides: Poisons in the Food Chain
  5.12  The Water Cycle
  5.13  Choosing a Waste Disposal Site
  5.14  Rethinking Before Recycling
  5.15  Garbage and the Community
  5.16  Acid in the Water Cycle 
  5.17  Environmental Models
  5.18  The Carbon Cycle
  5.19  Solutions for Global Warming 
  5.20  Succession
  5.21 Logging Old Growth 
  Design Challenge
  Unit Summary

 

Lesson Number At-Home Activity
(Parental involvement and/or supervision are essential while students carry out these activities.)
Getting Started: Environmental Issues Collect several soil samples from your yard, flower beds or potted house plants. Weigh an equal amount of each sample, then allow the samples to dry out. Weigh the samples again. Which soil sample lost the most mass as the water was removed?
5.1
Bear Necessities
List ways in which your habitat and that of wildlife in your community have overlapped. Develop a plan to improve the habitat of the wildlife in your immediate environment. (For example, what plants could be included in gardens in your area to attract various kinds of animals?)
5.2
The Organization of Life

Prepare a quiz for yourself on the new terms presented in this lesson. Write out the definition of each new term on a small flashcard, then have a family member quiz you. Separate the answers you know well from those that you do not know as well. Focus your study on the terms that you do not know well. This process of elimination helps to focus your study efforts where they are most needed.

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5.3
Case Study: Adaptations for Survival
Observe an organism that lives in or around your home. Report on the adaptations you have observed in this organism. (For example, dandelions have leaves that stay close to the ground so they are not easily cut down by lawnmowers. The leaves are large and dark green, which helps them collect sunlight efficiently. The flower stem grows quickly and the seeds ripen rapidly. Flowers produced continuously, so it is unlikely that you will destroy all the flowers by mowing weekly.)
5.4
A Landfill Ecosystem
Keep a journal of what your family puts into the garbage over a two-week period. Discuss with your family some ways to reduce the amount of refuse you generate.
5.5
Inquiry Investigation: What Belongs in a Landfill?
Try to duplicate this classroom investigation in your home composter or a small corner of a garden or flower bed. Compare the results.
5.6
Cycling of Matter
  1. Draw a design for a home composter. Be sure to allow for air movement as composting requires living organisms (bacteria) to recycle our food wastes.
  2. Explain why a composter may become an important piece of equipment on a space lab or intergalactic missions.

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5.7
Microbes in Ecosystems
Make a list of microbes found in your kitchen.
5.8
Inquiry Investigation: Nutrient Recycling and Plant Growth
Consult a local supplier of fertilizer to find out what the remainder of the mass of fertilizer represents. (For example, in a 12-8-8 fertilizer, the remaining 72% of the mass is a filler such as sand.) Why is it necessary to add filler to the fertilizer?
5.9
Career Profile: Field Biologist

Discuss with family members the effects of north-facing and south-facing slopes. For example:

  • where apple trees grow well
  • how to position a house to get the most benefit from solar radiation during the winter
  • which ski hills keep their snow the longest and what type of vegetation is found along the runs
  • what type of flowers bloom best along each wall or fence around the home

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5.10
Ecological Pyramids
Examine containers of various insect repellents used by your family. Record the contents of the repellents.
5.11
Case Study: Pesticides: Poisons in the Food Chain
  1. Discuss with family members the pros and cons of using pesticides to control disease-carrying or crop-destroying insects.
  2. Examine the labels of various pesticides used around the home to eliminate unwanted insects, moulds and weeds. Make a list of each one and what it is designed to control. Be sure to read the warning labels, too.
5.12
The Water Cycle

Make a list of items that you put into the garbage on one specific day. For each item, list soluble material that could be leached into the ground water in a landfill site.

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5.13
Case Study: Choosing a Waste Disposal Site
Discuss the Reflecting question (no. 4) in this lesson with your family. Should the cost of disposing hazardous wastes be borne by the consumers of the product?
5.14
Rethinking Before Recycling
For one week, keep all packaging materials separate from other garbage in your household. At the end of the week find the mass and volume of the packaging and that of the garbage. How do they compare? Decide as a family how you can change your purchasing habits to reduce the amount of packaging materials discarded.
5.15
Explore an Issue: Garbage and the Community
Discuss the Cosmos Conundrum scenario with your family and listen for suggestions that you can incorporate into your group's class presentation.
5.16
Acid in the Water Cycle

After you have designed the experiment to determine which plants do best in an acid soil (Exploring question no. 5), carry out the experiment at home, following the procedures you have planned.

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5.17
Inquiry Investigation: Environmental Models
Keep your ecocolumn at home to make long-term observations.
5.18
The Carbon Cycle
If you have not already done so in class, carry out the Try This activity for this lesson (Greenhouse Simulation) at home.
5.19
Case Study: Solutions for Global Warming

Discuss possible solutions for global warming with family members.

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5.20
Case Study: Succession
Observe the pattern of tree seedling growth in lawns, gardens or parklands to determine how it relates to distance from the tree. How did the seeds get to where they grow?
5.21
Logging Old Growth Forest
Research one Canadian endangered species and prepare a brief presentation for classmates or family members.
Design Challenge

Note to parents: Since the Design Challenge may be used by teachers as a performance assessment opportunity, parents should consult with the teacher to determine the appropriate degree of parental involvement in their child's completion of the Design Challenge.

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Unit Summary

The Unit Summary in your textbook lists all the learning expectations you have covered in the unit and identifies the specific lessons in which the knowledge and skills have been developed.

You can use the Unit Summary to help you create a personal study guide in preparation for an end-of-unit test:

  1. Copy down the list of learning expectations from your textbook. These are grouped under three headings: Understanding Concepts, Applying Skills, Making Connections.
  2. For each learning expectation, locate the appropriate lesson(s) in the unit where the expectation was covered. These are listed at the end of each expectation (e.g., 2.1).
  3. Flip to the appropriate lesson(s) for each expectation and make study notes of the key ideas or skills you learned.

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