4. the edible chain

The first unit
subject learning points:
1. A required condition as seed germination: a definite degree of humidity, proper temperature, air.
2. The conditions necessary for vegetation growth: sunlight, moisture, temperature, air .
3. earthworm appropriate living environment: dark, damp environment.
4. the edible chain: biological interlock among the same edible as the relationship, called the edible fetter.
5. the food chain can build their own food The biological name maker, purchaser, instantly alternatively indirectly build another organism called the consumers of food. the food chain is commonly started from the green to the termination of the savage carnivore.
6. ecosystems: in the pool of these biological and non-living this way, interaction, interdependence, forming an inseparable whole, we can discern them as an ecosystem.
7. biotic community: a zone where normal biological form a harmonious whole poise ,shanghai escort, called biomes.
explore the issues:
1. seed germination experiment plan. P3
A: The development of : mung bean seed germination must have water up?
My guess: there have to be water, mung bean seed germination under different conditions
two groups: two groups of water
the same conditions: temperature, air,10 08 级 anesthesia, the two are the same size and kind of green beans (in adding to other conditions other than water must be the same)
experimental methods: A relative experiment, a group of seeds to water, reserve watery, cried the experimental team; to dissimilar group of seeds Debu to the water, reserve dry,shenzhen massage, called the control group;
steps:
(1) for 2 of the same box;
(2), respectively, the same amount of tissue pad in the two boxes;
2. if the growth of plants need sunlight pilot project. P7
A: development of Light up?
My guess: the growth of mung bean sprouts absence the sun.
two different sets of conditions: sun
the same conditions two groups: temperature, green bean sprouts, water (except for conditions other than the sun should be the same)
experimental methods: A comparative experiment,beijing massage, a group of green bean sprouts are the sun, so another group of green bean sprouts are no the sun, other things creature equal.
steps:
(1) in the put two of the same pot the same amount of soil, respectively, on the two kinds of green bean sprouts;
(2) pouring the same value of water;
(3) to which a kettle ashore a bright place, the other pots in a dingy area;
(4) afterward almost one week to inspect the two pots of green bean sprouts whichever changes.
3. earthworm like the dark or bright living environment experimental procedure. P9
A: research question: earthworm like the dark or sunny environment?
My guess: earthworm alive environment like the dark.
conditions to be changed: to keep the light
the same conditions: temperature, 10 earthworms uniform size, (except for conditions other than light must be the same)
Experimental Methods: To compare the experimental method (only let light in through the dish by one end)
steps: < br> (1) to find a rectangular box drew dark inside the box, the box cover, hack one end of a small,
(2) in the bottom of the box lined with digestive paper;
(3) to 10 earthworms placed in the middle of the box, cover the lid;
(4) 5 minutes after the detection of any changes in the situation of earthworms, make a log;
(5) continual several times.
4. earthworm like the dry and wet environment of the experimental program.
A: research question: earthworm like dry and wet environment?
My guess: earthworms favor moist environment.
to alteration the conditions: soil moisture conditions remain unchanged
: temperature, 10 earthworms uniform size, light (except for conditions other than water must be the same)
Experimental Methods: To liken the experimental usage
steps: < br> (1) to ascertain a rectangular box, the box were covered with a layer of soil at both ends, one end of the shop wet, dry shop at one end;
(2) apt 10 earthworms in boxes in the navel, cover the lid ;
(3) 5 minutes after the observation of any changes in the position of earthworms, make a record;
(4) reiterated several periods.
5. animal and plant growth requires a certain environment, when After the change of environment they will go hard to adjust to environmental changes, one sample.
A: Plants: cactus, its leaves into a foliage backbones,beijing escort, can reduce water wastage, to adapt to living in dry desert places.
pine The leaves are needle-shaped leaves, but too to reduce water loss and adapt to life in the mountains.
animals: frogs, when winter comes, the frog will encounter their needs on the environment, will find places to hibernate.
Dayan, birds searching for their own needs on the environment will migrate.
6. people action which caused grassland ecosystem balance? The end result namely what? How do we change this position, how to do that? P20
A: human behavior are: 1. for economic development, over-grazing behavior; 2. a lot of hounding savage animals deed; 3. to drive away the economic benefits of animal behavior, 4. Deforestation, erasure of vegetation acts of blind exploitation.
last The result: the imbalance of grassland ecosystems, grassland desertification, ambition eventually lead to dust tempests.
we should do: 1. to protect the ecological balance of nature, the establishment of nature keeps, 2. more afforestation and the conservation of nature air, soil, forests, animals, plants .3. vigorously advocate for the protection of nature, the magnitude of maintaining ecological balance .4. exemplary obedience strive to retain the balance of nature.
7. design an eco-bottle P16
A: slightly