Get Full Essay Get access to this section to get all help you need with your essay and educational issues. Suppose a household product label says it contains sodium hydrogen carbonate sodium bicarbonate.
Macroscopic patterns are related to the nature of microscopic and atomic-level structure. Introduction and Connection to the NGSS and Common Core In this lesson, students go through a series of lab stations in order to practice identifying reactions as chemical or physical changes and determining the physical and chemical properties that change during the reaction.
At each lab station, students not only identify the signs of a chemical change, but they also read reactant and product descriptions in order to identify changes in chemical and physical properties that occurred.
Each station is fun and allows students to get a real visualization of evidence that can predict a chemical change! Science and Engineering Practices: When students look for patterns in data to identify the signs of a chemical change based on their qualitative observations, they do just that!
Therefore, this also means that students analyze and interpret data to provide evidence to describe phenomena. At each lab station, students use patterns in evidence to identify each reaction as chemical or physical. Students thus realize that patterns can be used to predict phenomena.
In addition, students look at chemical equations and start to make clearer connections to the idea that bonds are broken and formed during chemical reactions.
Thus, they can realize that macroscopic patterns are related to the nature of microscopic and atomic-level structure. Patterns Connecting to the Essential Question: What are you supposed to learn today?
Students should respond by saying that they will be answering the Essential Question, "How do particles combine into new substances? And, what evidence can show how the physical and chemical properties of the substances change? Explain to students that we will again be working with Skill 5 of the Chemistry Unit Plan, "I can provide evidence to show if a reaction is a chemical or physical change.
Have the students turn to their unit plans and silently read the skill. After reading the skill have the students rank their current level of mastery on a scale of 1 to 4 4 being mastery. Students in my room have already assessed themselves in the lesson prior to this; this would be an opportunity for the student to change their number if they felt their level of mastery had increased after the previous lesson.
In my classroom, students frequently self-assess their level of understanding on each skill in the unit as we go.
As you can see from the image below, this student ranks has continually updated his level of mastery on each skill has his learning has developed. Students in my class have already had an introduction to the differences between chemical and physical reactions.
For a look at all the lessons that have led my students to this point and where we go from here check out the lessons in these units: Molecular Arrangement and Phase Changes: Focuses on Skills 1 - 4 of the Chemistry Unit Plan This unit is designed to answer the Essential Question, "How do particles combine into new substances?
What evidence can show how the physical and chemical properties of the substances change? It particularly focuses on types of matter, physical properties, phase changes, and factors that affect physical properties.Qualitative observation, quantitative observation, interpretation, hypothesis Record any change in temperature.
Part B. Creating and testing a hypothesis. As you perform this experiment, record your observation in Data Table 2. OBSERVING A CHEMICAL REACTION EXPERIMENT 2 4 TEACHER NOTES 1. Wear goggles at all times. Throughout this experiment, chemical changes were observed, where the color of each mixture was analyzed.
The main objectives were careful seen in the properties of each mixture.
In the lab manual it mentions how we cannot see the individual atoms and molecules reacting but we are able to observe color changes, precipitates and formation of. Demonstration. In this experiment copper(II) oxide and zinc metal are reacted together. The reaction is exothermic and the products can be clearly identified.
The experiment illustrates the difference in reactivity between zinc and copper and hence the idea of competition reactions. between observation and interpretation is very important in chemistry. Record any change in temperature.
5. Follow your teacher’s instructions for proper disposal of the materials. Experiment 3: Observing a Chemical Reaction Author: Prentice Hall Keywords: Section Observing Chemical Changes Lab When two or more substances (chemicals) are mixed a new substance MIGHT be formed.
If a new substance is formed we say a CHEMICAL CHANGE . Below is an essay on "Labpaq 3 Observations of Chemical Changes" from Anti Essays, your source for research papers, essays, and term paper examples. Data Tables and Observation: Fill out the data sheet (below) for the experiment and submit with this form.