14.3 Energy flows through ecosystems

Vocabulary: producer, consumer, decompose, food chain, food web, energy pyramid

Review
1. Producers make sugars using sunlight. Consumers eat other consumers and producers. Decomposers break down dead producers and consumers.

2. Food webs show that one organism can have more than one role in an ecosystem.

3. Available energy decreases.

4. Drawing of food chain with each organism labeled.

5. Secondary consumers would disappear without having muskrats to eat. Producers would get more plentiful without the muskrats eating them.

Here is a powerpoint presentation on ecosystems.

Ecosystems

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14.1 Ecosystems support life.

Lesson Vocabulary: biology, environment, photosynthesis, respiration, system,
abiotic factor, biotic factor, ecology, ecosystem

Review:
1. Diagrams should have biotic-living, and abiotic- not living factors labeled.

2. Sample answer: Plants produce oxygen and food. Coral reefs provide shelter.

3. They determine the types and abundance of plant life.

4. For a day: would have little effect on the ecosystem; for a year: much of the plant life would disappear, and the animal life that depends on it.

5. Sample answer: biotic factors: eating plants and animals, being stung by an insect, feeding birds; abiotic factors: breathing air, drinking water, building with stone.

14.1 Ecosystems

Ch. 14.4 Biomes contain many ecosystems

Lesson Vocabulary: biome, coniferous, deciduous, ecosystem, estuary

7th grade Biology students here is the link with the video you need to watch. Please leave a comment about something that you learned or thought was interesting.

URL=http://www.kidsknowit.com/interactive-educational-movies/free-online-movies.php?movie=Biomes

Review
1. available water, temperature, soil

2. tundra:mosses, lichens; taiga: coniferous trees; desert: cacti; grassland: grasses; temperate forest: deciduous trees; tropical forest: plants grow on top of each other, vines , orchids

3. rivers and streams, lakes and ponds, estuaries, coastal ocean, open ocean, deep ocean

4. desert

5. sunlight, water depth, temperture, nutrients

6. tropical forest, desert, taiga, tundra

Ch. 16.2 Human activities affect the environment.

Lesson Vocabulary: biodiversity, pollution

Review

1. renewable: air, water, wood, crops

nonrenewable: oil, coal, minerals, metals

2. Wind can carry acid rain; chemical pollutants run off land into groundwater

3. number and variety of life forms in an ecosystem

4. Sample: Natural resources can be pollutants when they end up where they don´t beong. Example: when erosion washes soil into streams; carbon from forest fire pollutes the air.

5. Sample: low biodiversity: grass field with insects, worms; high biodiversity: a forest with variety of plant and animal life

6. Acidic water slows the growth of producers in the lake. With fewer producers and less food available, the water appears clearer because there is less life in it.

Ch. 7.2 Biologists use seven levels of classification.

You may not copy the classification of the bear. It will not count!

Vocabulary: genus binomial nomenclature, dichotomous key

Reveiw 7.2

1. the naming system that uses the genus and species of an organism

2. kindom, phylum, class, order, family,genus, species; kingdom level

3. Each question has only two choices. This eventually leads to the identification.

4. He developed systems for both naming species and organizing them into groups.

5. A dichotomous key is a series of questions with two possible answers for each question. A field guide has pictures of animals or plants. It can help determine visual similarities, but may be incomplete. A dichotomous key can help narrow down possible organisms, but maybe time consuming.

6. size, coloration, age

Ch. 7.1 Scientists develop systems for classification.

Vocabulary: evolution, ancestor, trait, classification, taxonomy

Review 7.1
1. Classification allows taxonomists to organize a lot of data so that it is easy to find and understand.
2. Taxonomists study biological relationships to discover how one species evolved as compared with another species.
3. Scientists look at DNA and compare genes of organisms.
4. Having a universal naming system allows people speaking different languages to refer to all organisms the same way.
5. a marbled godwit would have marbled feathers, wings, feet, a beak.
6. Compare physical traits, such as color, size, weight, and how they get energy; analyze bones; compare to fossils; compare DNA