1. Explore the influence of biological factors on biology

2. Observe plant cells and animal cells (observe human oral epithelial cells).

3. The structure of kidney bean and corn seeds

4. Explore the conditions of seed germination

5. Determine the germination rate of seeds

6. Observe the structure of the blade

7. Green leaves make organic matter under light.

8. A series of exploratory experiments on breathing:

(1) experiment of carbon dioxide release by plant respiration

(2) Experiment of plant breathing oxygen.

(3) The experiment of starch consumption by plant respiration.

(4) Plant respiration is an experiment of releasing heat.

9. Determination of energy in food

10. Explore the changes of steamed bread in oral cavity

1 1. Collect and measure dust particles in the air.

12. Formation and excretion of urine

There are many kinds of experiments, which can be divided into different types from different angles.

From the content and purpose of experiments, chemical experiments are usually divided into measurement data experiments, exploratory experiments (the conclusion is later, reflecting the process of discovery and exploration) and confirmatory experiments (the conclusion has been made and confirmed by experiments).

Measurement data experiment refers to the experimental exploration activities purposefully carried out by the experimenter in order to measure a certain data or a certain group of data: lavoisier determination of air composition, ph measurement (pH

Experiments are all data measurement experiments.

Inquiry experiment refers to a cognitive activity in which experimenters draw conclusions through their own experiments, exploration, analysis and research without knowing the experimental results, thus forming scientific concepts.

Confirmatory experiment refers to an experiment that has a certain understanding of the research object, and has formed some understanding or put forward some hypothesis to verify whether this understanding or hypothesis is correct.

For the same experiment, whether it is exploratory experiment or confirmatory experiment needs to be determined according to the students' situation, the experimental conditions of the school and the requirements of the teachers' teaching purposes, that is to say, each specific experiment can be changed as needed. For example, the confirmatory experiment can be improved into an exploratory experiment of water purification.