"General Review of the First Volume of Biology for Grade 8" PPT courseware

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"General Review of the First Volume of Biology for Grade 8" PPT courseware

Must memorize before exam

1. Fish use ____ to breathe and ____ to swim.

2. The pectoral fins and pelvic fins of fish both have the function of ____ the body. ____Control the direction of progress.

3. The characteristics of birds that are adapted to the flying society: the body surface is covered with feathers, and the forelimbs become ____; there are ____ in the body; the body temperature is ________.

4. The main characteristics of mammals: ____________.

5. Among all animals, the body temperatures that are constant are ________ and ________.

1. Main reasons for wrong selection

1. Careless review of the question and answering without clarifying the meaning of the question;

2. Related or similar concepts are confused;

3. Take it for granted and apply answers or questions from life experience and exercises you have done;

4. Wrong examination methods and strategies, lack of confidence, and psychological stress.

1. Extract authenticity of information

It is mainly done through question review, which is to maximize the acquisition of information useful for solving the problem. Pay attention to this process:

(1) Learn to identify the direction of test questions;

1. Food can be stored for a longer period of time in the refrigerator because of the low temperature ( )

A. Inhibit bacterial growth and reproduction

B. Accelerate bacterial reproduction

C. Cause massive death of bacteria

D. Accelerate the reproduction of fungi

(2) Find the key words in the question stem:

1. The most effective measure to protect biological diversity is ( )

A. Establishing a germplasm bank of endangered species

B. Promulgate various laws and documents

C. Establish a breeding center for endangered species

D. Establish a nature reserve

2. Biological classification is a basic method for studying organisms. The most basic classification unit is ( )

A. Phylum B. Class C. Family D. Species

1. Which of the following statements is correct ( )

A. Bacteria do not have a formed nucleus.

B. Fungi are multicellular organisms

C. Bacteria reproduce through spores

D. Fungi reproduce by dividing

2. The following animal behaviors are innate behaviors ( )

A. The bird feeds the goldfish

B. Big tits steal milk

C. The earthworm runs through the maze

D. Adult chimpanzees stack wooden boxes to high bananas

3. The following organisms that belong to fungi are ( )

A. Penicillin

B. Bacillus subtilis

C. Staphylococcus aureus

D. Tobacco mosaic virus

3. Adjust your psychology for taking exams

⒈Ensure adequate sleep and nutrition, balance work and rest, prevent diseases, and take the exam with a full mental state. You must adjust your "biological clock" so that the brain's excitement point is adjusted to the time of the high school entrance examination to ensure that the brain enters the examination room in the best condition.

⒉Build up the confidence to win and overcome stage fright. After getting the test paper, read through it first to make sure you know it well. Don’t mind the difficulty of the question, because “it’s hard for me and it’s hard for you, and it’s easy for you too”.

⒊ Make all kinds of material preparations before the test. Be sure to check whether all the test equipment is ready the day before the test.

⒋Use the exam time effectively, first easy and then difficult, let go of difficult problems for the time being, do most of the questions well, don’t panic, and then go back to do the difficult problems calmly; otherwise, you will get stuck as soon as you get into battle and don’t hand in the paper in advance. Check carefully the remaining time.

practise

1. When a research institution studied the reasons why animals are endangered or threatened, they summarized some data, as shown in the chart below:

(1) Analyzing the chart above, the main reasons why mammals and birds are threatened are: habitat loss and poaching.

(2) What measures does my country take to protect my country’s biological diversity? What should you do as a citizen?

my country’s measures:

1. Establish multiple nature reserves of various types;

2. Join the international Convention on Biological Diversity Conservation;

3. A series of laws have been formulated to protect biological diversity.

How we do it:

1. Raise awareness: Understand that every living thing has its own value. Protecting biodiversity is to protect humans themselves, and we should practice it.

2. Don’t eat wild plants and establish a new concept of diet.

3. Protect nature reserves and all green plants.

2. The animal behaviorist brought the chimpanzee, who is often used for animal behavior experiments, into the experimental room and then left. He stopped outside the door for 5 minutes and looked into the room through the key hole on the door. He found that the chimpanzee was also observing him through this hole. Excuse me:

(1) Is the behavior of chimpanzees innate or learned?

(2) Why does this behavior occur?

(3) What did this experiment prove?

3. Answer based on the joint structure diagram on the right

(1) Fill in the names of each part

①.__________.②.__________.

③.__________.④.__________.

⑤.__________.

(2) Name two joints in your body:

①.__________ . ②.__________.

(3) When skeletal muscles are stimulated by nerves and contract, __________ will be affected to move around __________, and the body will move. When playing sports, __________ joints are easily injured. Therefore, when playing sports, you should first ____________________.

4. Although he can eat but does not like to move, he weighs 50 kilograms at the age of 9, and he is unable to do physical education classes. He saw that the pigeons were also very good at eating, but he was worried that the pigeons would become fat and unable to fly. His worries were known to the science teacher. After the teacher talked with Mingming, Mingming became very fond of sports. What did the teacher say?

Birds eat a lot because they consume a lot of energy when flying. Birds have strong digestive functions, short rectums, and fast excretion to reduce weight. Obviously, if you learn from the bird, exercise more and convert nutrients into energy needed for life activities, you will not accumulate excess fat in your body, lose weight, and exercise more flexibly.

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Update Time: 2024-11-03

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