1 / 9

Chapter 1 Introduction

Chemistry B2A. Chapter 1 Introduction. Chemistry and our life. Chemistry. Chemistry: science that deals with materials and their changes. Central Science. All sciences are connected to chemistry. Changes. Chemical change (chemical reaction):

casey
Download Presentation

Chapter 1 Introduction

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chemistry B2A Chapter 1 Introduction

  2. Chemistry and our life

  3. Chemistry Chemistry:science that deals with materials and their changes. Central Science All sciences are connected to chemistry.

  4. Changes Chemical change (chemical reaction): substance(s) are used up (disappear) → other forms burning a paper or cooking an egg Physical change: identities of the substances do not change. (change of state) evaporation of water or melting

  5. How do you solve a problem? • Recognize the problem: Observation • Propose possible solutions: Hypothesis • Decide which of the solutions is the best: Experiment

  6. Scientific method 1. Fact:is a statement based on direct experience (observation). State the problem and collect data Qualitative observation:Water is liquid. Quantitative observation:water boils at 100°C. Measurement

  7. Scientific method 2. Hypothesis:is statement that is proposed to explain the observation. (without actual proof) 3. Experiment:performing some tests to prove hypothesis. (find a proof)

  8. Scientific method 4. Theory (model):is a set of tested hypotheses. We have a stronger belief in it because of more evidence supports it. Law:is a summery of observed behavior. We formulate this observations. Serendipity:Observation by chance

  9. Some points about chemistry We Should learn the language of chemistry. Think and trust yourself to figure things out. It is no disaster to make a mistake as long as you learn from it. Practice and help each others. Be patient.

More Related