What are formulas of trực tiếp bóng đá euro hôm nay Law of Conservation of Mass for grade 8 students in Vietnam? What are general orientations in evaluating educational results in grade 8 Natural Sciences in Vietnam?
What are formulas of trực tiếp bóng đá euro hôm nay Law of Conservation of Mass for grade 8 students in Vietnam?
trực tiếp bóng đá euro hôm nay Law of Conservation of Mass is one of trực tiếp bóng đá euro hôm nay concepts that grade 8 students learn withinthe grade 8 Natural Science curriculum.
trực tiếp bóng đá euro hôm nay law of conservation of mass is stated as follows:
In a chemical reaction, trực tiếp bóng đá euro hôm nay total mass of trực tiếp bóng đá euro hôm nay products is equal to trực tiếp bóng đá euro hôm nay total mass of trực tiếp bóng đá euro hôm nay reactants.
trực tiếp bóng đá euro hôm nay Law of Conservation of Mass was discovered by trực tiếp bóng đá euro hôm nay scientists Lomonosov and Lavoisier. This law informs us that in every chemical reaction, there are only changes involving electrons, while trực tiếp bóng đá euro hôm nay number of atoms of each element remains unchanged, as well as trực tiếp bóng đá euro hôm nay mass of trực tiếp bóng đá euro hôm nay atoms. Therefore, trực tiếp bóng đá euro hôm nay mass of trực tiếp bóng đá euro hôm nay substances is conserved.
trực tiếp bóng đá euro hôm nay formula for trực tiếp bóng đá euro hôm nay law of conservation of mass is as follows:
mA + mB = mC + mD.
Where:
mA is trực tiếp bóng đá euro hôm nay mass of substance A;
mB is trực tiếp bóng đá euro hôm nay mass of substance B;
mC is trực tiếp bóng đá euro hôm nay mass of substance C, and
mD is trực tiếp bóng đá euro hôm nay mass of substance D.
For example: trực tiếp bóng đá euro hôm nay mass of BaCl2+ trực tiếp bóng đá euro hôm nay mass of Na2SO4= trực tiếp bóng đá euro hôm nay mass of BaSO4+ trực tiếp bóng đá euro hôm nay mass of NaCl.
What are formulas of trực tiếp bóng đá euro hôm nay Law of Conservation of Mass for grade 8 students in Vietnam? What are general orientations in evaluating educational results in grade 8 Natural Sciences in Vietnam? (Image from trực tiếp bóng đá euro hôm nay Internet)
What are general orientations in evaluating educational results in grade 8 Natural Sciences in Vietnam?
According to trực tiếp bóng đá euro hôm nay General Education Program for Natural Science issued along withThông tư 32/2018/TT-BGDĐT, trực tiếp bóng đá euro hôm nay general orientations in evaluating educational results in grade 8 Natural Sciences in Vietnam areas follows:
trực tiếp bóng đá euro hôm nay goal of evaluating educational results is to provide accurate, timely, and valuable information about trực tiếp bóng đá euro hôm nay extent to which trực tiếp bóng đá euro hôm nay program's standards (required achievements) are met and trực tiếp bóng đá euro hôm nay progress of students to guide learning activities, adjust teaching activities, manage and develop trực tiếp bóng đá euro hôm nay program, ensure each student's progress, and improve trực tiếp bóng đá euro hôm nay quality of education.
trực tiếp bóng đá euro hôm nay basis for evaluation is trực tiếp bóng đá euro hôm nay required achievements regarding qualities and competencies stipulated in trực tiếp bóng đá euro hôm nay overall curriculum and trực tiếp bóng đá euro hôm nay subject curriculum. trực tiếp bóng đá euro hôm nay scope of evaluation encompasses trực tiếp bóng đá euro hôm nay entire content and required achievements of trực tiếp bóng đá euro hôm nay Natural Science program. trực tiếp bóng đá euro hôm nay evaluation is based on evidence from trực tiếp bóng đá euro hôm nay process of practice, learning, and products during trực tiếp bóng đá euro hôm nay student's learning process.
Educational results are evaluated qualitatively and quantitatively through process evaluation, summative evaluation at educational institutions, broad-based assessments at trực tiếp bóng đá euro hôm nay national, local levels, and international assessments.
Process evaluation is organized by trực tiếp bóng đá euro hôm nay subject teacher based on trực tiếp bóng đá euro hôm nay evaluation results from teachers, parents, trực tiếp bóng đá euro hôm nay self-assessment of trực tiếp bóng đá euro hôm nay student being evaluated, and peer assessments within trực tiếp bóng đá euro hôm nay group or class.
Summative evaluation is organized by educational institutions. Broad-based assessments at trực tiếp bóng đá euro hôm nay national or local levels are conducted by national or provincial quality assessment organizations to serve trực tiếp bóng đá euro hôm nay management of teaching activities, program development, and education quality enhancement.
trực tiếp bóng đá euro hôm nay evaluation method ensures reliability, objectivity, suitability for each age group and educational level, does not cause pressure on students, and minimizes expenses for trực tiếp bóng đá euro hôm nay state budget, student families, and society. Testing and evaluation must meet trực tiếp bóng đá euro hôm nay following main functions and requirements:
- Assess trực tiếp bóng đá euro hôm nay level of attainment of required achievements and teaching methods.
- Provide full, accurate, and timely feedback on valuable learning results for students to self-adjust their learning process; for teachers to adjust teaching activities; for school administrators to devise solutions to improve education quality; and for families to monitor and assist students.
- Self-assessment and peer assessment among students are emphasized and considered as a means to develop competencies such as self-study and critical thinking; to form qualities such as diligence, perseverance, self-control, and self-confidence.
- Combine process evaluation with summative evaluation; combine qualitative and quantitative evaluation, with quantitative evaluation based on qualitative evaluation feedback that is timely and accurate.
- Utilize various forms of testing and evaluation to ensure comprehensive assessment of content, general competencies, specific competencies, and qualities.
- Require integrated content and skills to solve cognitive and practical problems. This is an effective characteristic method for evaluating student competencies.
- Emphasize trực tiếp bóng đá euro hôm nay evaluation of practical natural science skills.
How much time is allocated to trực tiếp bóng đá euro hôm nay content of Substancesand Its Transformation in trực tiếp bóng đá euro hôm nay grade 8 Natural Science curriculum in Vietnam?
In trực tiếp bóng đá euro hôm nay General Education Program for Natural Science issued along withThông tư 32/2018/TT-BGDĐT:
| Content | Grade 6 | Grade 7 | Grade 8 | Grade 9 |
| Introduction | 5% | 4% | 2% | 2% |
| Matter and its transformations | 15% | 20% | 29% | 31% |
| States of matter | 3% | |||
| Oxygen and air | 2% | |||
| Some common materials, fuels, raw materials, foodstuffs | 6% | |||
| Solutions; Separating substances from mixtures | 4% | |||
| Atoms. Chemical elements | 6% | |||
| Molecules | 9% | |||
| Overview of trực tiếp bóng đá euro hôm nay periodic table of chemical elements | 5% | |||
| Chemical reactions | 12% | |||
| Reaction rate and catalysts | 3% | |||
| Acids - Bases - pH - Oxides - Salts; Chemical fertilizers | 14% | |||
| Metals | 8% | |||
| Basic differences between non-metals and metals | 4% | |||
| Introduction to organic substances Hydrocarbon and fuel source |
7% | |||
| Ethylic alcohol, acetic acid; Lipid - Carbohydrate - Protein - Polymer | 12% | |||
| Living organisms | 38% | 38% | 29% | 25% |
| Cells - trực tiếp bóng đá euro hôm nay basic unit of life | 11% | |||
| Diversity of trực tiếp bóng đá euro hôm nay living world | 27% | |||
| Metabolism and energy transformation in organisms | 23% | |||
| Response in organisms | 3% | |||
| Growth and development in organisms | 5% | |||
| Reproduction in organisms; Organism as a unified entity | 7% | |||
| Human body biology | 20% | |||
| Environment; ecosystem | 9% | |||
| Inheritance phenomena | 19% | |||
| Evolution | 6% | |||
| Energy and its transformations | 25% | 28% | 28% | 28% |
| Measurements | 7% | |||
| Forces | 11% | 8% | 6% | |
| Density and pressure | 8% | |||
| Energy and life | 7% | 6% | 7% | |
| Sound | 7% | |||
| Light | 6% | 9% | ||
| Electricity | 8% | 7% | ||
| Magnetism | 7% | 5% | ||
| Earth and sky | 7% | 0% | 2% | 4% |
| Observable motions of trực tiếp bóng đá euro hôm nay Sun, Moon; Solar system; Milky Way | 7% | |||
| Biosphere and biomes on Earth | 2% | |||
| Exploiting resources from trực tiếp bóng đá euro hôm nay Earth's crust; Overview of "Chemistry of trực tiếp bóng đá euro hôm nay Earth's crust" | 4% | |||
| Periodic evaluation | 10% | 10% | 10% | 10% |
Thus, trực tiếp bóng đá euro hôm nay content of Substances and Its Transformation accounts for 29% of trực tiếp bóng đá euro hôm nay grade 8 Natural Science curriculum.
