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Sci 7- Unit 1- Topics 1-2-3
Transcript of Sci 7- Unit 1- Topics 1-2-3
Ecosystems (cc) photo by theaucitron on Flickr (cc) photo by theaucitron on Flickr Topic 1-
Ecosystem Let's start at the bottom of things... p. 6 to 17 what is ECOLOGY? what is an ecologist? any ideas?
find out their
write them out. Did you get... Ecology is the study of the
relationship between living
organisms and their environment.
An ecologist is someone who
studies those relationships. Please Read:
p 6-7-8 The Needs of Living Things There are 4:
NAME and DEFINE each one
(Use at least one example) Living things need food. Living things need a suitable habitat. Living things need water. Living things exchange gases. Living things are always interacting with each other and with the non-living things in their environment. Adaptations Please Read:
p. 10-11 Living things are adapted, so they 'fit' into
their surroundings, to ensure survival. An adaptation is inherited during the organism's lifetime. It is a characterisitic that helps
an organism survive and
reproduce in its environment. 4 basic needs P. 11 "Did You Know" Science 7-
Assignment Ecosystems An ecosystem is the interactions between living
things in a
environment. An ecosystem is a place where these
as a rotting
log, or a forest. All organisms and parts within this place are interacting all the time and adjustments must occur if the organism is to survive. Do things grow?
Do things interact in the wild?
How? Ecosystems vary in size and complexity. Tip Real
Huge This looks like a huge mountain imagine that this is a small part of the ecosystem...
like a dead tree in a forest... In order to study an entire ecosystem, scientists often study only a small aspect of an ecosystem and then work with other scientists to piece together THE WHOLE FOREST the overall picture of how the ecosystem functions. P. 13 Interactions in Ecosystems Symbiosis - When two species live cosely together in a relationship that lasts over time symbiosis occurs. What do you think the three types of relationship there are?.... occurs when there is a relationship between two different organisms, in which each partner benefits from the relationship. Mutualism Parasitism occurs when there is a relationship between two different organisms, in which one partner benefits from the relationship, while the other partner is harmed. Typically, the partner that benefits (the parasite), lives on or in the other organism (the host) and feeds on it. occurs when there is a relationship between two different organisms, in which one partner benefits from the relationship, while the other neither benefits, nor is harmed. Commensalism ask about the ethiopians monkeys P. 14- 15 Impacts on Ecosystems Symbiotic relationships are only a few ways that organisms interact with one another within an ecosystem. Other interactions may involve the physical changing of the ecosystem by the organisms living in it and interacting with parts of it. For every action in an ecosystem there is a resulting effect and reaction which will change the make-up of the ecosystem in some way. Like when a family of beavers make a dam, the stream below the dam dries up, killing the water organisms that need the water to survive. Above the dam, a pond changes the habitat and limits the kinds of organisms that can survive there. P. 16 P. 17
All Questions Topic 2 : Human Impacts on Ecosystems P. 18- 28 Natural
Resources are the materials and products that are found in nature, that people use to meet their basic needs. p. 18-19 Write down at least 5 natural ressources, your answers will be shared with the class. The impact that people have on the use of resources can be very small, or
can be huge,
and can lead
Effect? "The needs of all living things now have to be met with the available natural resources. How we are able to satisfy these needs with minimal conflict will determine how resourceful we can be." What does this statement mean?
Can you put it into a better sentence?
your own words in your notes.... People and Nature -
A Changing Relationship Nowadays, resources are transported throughout the world, as the demand gets higher. The ways people interact with the environment has changed over time. Machines and advanced technologies have caused a higher impact than in the past. Lifestyle changes over time have increased the pressure on different environments and the ecosystems we live in. Gathering Food in Alberta:
Then and Now Where Head-Smashed-In Buffalo Jump Prairie Settlers Cattle Feedlots What are the Differences Between these ways of gathering food?
How do they work?
Which is best? P. 21 p. 20 What is a Need?
What is a Want? Needs are basic to survival ' wants ' are things that just make survival more comfortable or enjoyable. Each time a need or a want is satisfied, natural resources or energy are used up. This impacts the environment we live in. When this happens we need to decide whether our want is more important than their need. The needs of wildlife can be negatively impacted by the wants of people. p.22-23 Are forest fires bad? Is spraying for Mosquitoes a good thing? please read p. 24-25 No Simple Answers These fires get rid of small trees, leaves, needles and other debris that settles on the forest floor.
The new growth after a fire becomes food for elk, deer and other animals that need these nutrients from the forest floor. Setting a forest on fire (a controlled burn) is often necessary to maintain a balance in the ecosystem. what is DDT? answer as a class... Ready for the Review? Topic 2 Review
ALL questions Topic 3 : Environmental Choices p. 29-37 Are we putting back what we take out, or, are we using up all the resources before they can be replaced? Energy includes: electricity, natural gas, as well as all the energy needed to produce, and transport all of the manufactured products you use The ecological footprint of average Canadians is very large,
more waste than is sustainable. Ways to reduce ecological footprint include:
1. Be aware of the products you consume in a typical day
2. Reduce the energy you use
3. Reduce the number of products you buy
4. Reduce the amount of garbage you produce
We depend on the environment and we are part of the environment.
Sustainability means that the resources from the environment can be replaced as quickly as they are used. Your Ecological
Footprint p.29 http://www.footprintnetwork.org/en/index.php/GFN/page/calculators/ here's a good link To calculate your ecological footprint, you need to determine the total area of land that you use Impact Here and There and water needed to supply all of the energy and materials that you use, as well as absorb all of the waste that you produce. Materials that are included are: food, water, supplies to build shelter and raw materials needed to produce the manufactured products you use. p.30-31 Did you know... Reduce, Reuse, Recycle p. 33 Reduce.
"Reduce" means using fewer resources in the first place. This is the most effective of the three R's and the place to begin. It is also, I think, the hardest because it requires letting go of some very American notions, including: the bigger the better, new trumps old. Reuse.
Before you recycle or dispose of anything, consider whether it has life left in it. A jam jar can store leftovers. Food scraps can become compost. An old shirt can become a pajama top. An opened envelope can become a shopping list. A magazine can be shared. DVDs can be traded. A dishwasher can be repaired. A computer can be upgraded. A car can be resold. A cell phone can be donated. Recycle.
Recycling is the "R" that has caught on the best. Partly, this is because there are so many curbside recycling programs today (8,660 as of 2006, according to the EPA), which makes recycling so darned easy. What keeps it from being a total piece of cake is the rules. Every municipality has its own, and they are not always as straightforward as they could be. long vid short vid The Wrap up... p. 37
1-6 www.superteachertools.com/jeopardy/makegamex.php http://www.footprintnetwork.org/en/index.php/GFN/page/calculators/ Click the Link