Topic: Oxygen: properties and application

Target group

Elementary school student (grades 7. and 8.)

Core curriculum:

Primary school. Chemistry.

IV. Oxygen, hydrogen and their chemical compounds. Air. Pupil:

1) designs and conducts an experiment consisting in obtaining oxygen and examines selected physical and chemical properties of oxygen; reads from various sources (eg periodic table of the elements, solubility plot) information about this element; lists its uses; writes the equations of the oxygen production reaction and the oxygen reaction equation with metals and non‑metals;

6) describes the circulation of oxygen and carbon in nature.

General aim of education

The student discusses the preparation, properties and use of oxygen.

Key competences

• communication in foreign languages;

• digital competence;

• learning to learn.

Criteria for success
The student will learn:

• indicate oxygen properties;

• give examples of the use of oxygen and oxides in everyday life;

• plan and perform experiments to obtain oxygen and oxides.

Methods/techniques

• expository

  • talk.

• activating

  • discussion.

• programmed

  • with computer;

  • with e‑textbook.

• practical

  • exercices concerned.

Forms of work

• individual activity;

• activity in pairs;

• collective activity.

Teaching aids

• e‑textbook;

• notebook and crayons/felt‑tip pens;

• interactive whiteboard, tablets/computers.

Lesson plan overview

Introduction

1. The teacher hands out Methodology Guide or green, yellow and red sheets of paper to the students to be used during the work based on a traffic light technique. He presents the aims of the lesson in the student's language on a multimedia presentation and discusses the criteria of success (aims of the lesson and success criteria can be send to students via e‑mail or posted on Facebook, so that students will be able to manage their portfolio).

2. The teacher together with the students determines the topic – based on the previously presented lesson aims – and then writes it on the interactive whiteboard/blackboard. Students write the topic in the notebook.

Realization

1. Students will get acquainted with the content of the abstract..

2. Students, working in pairs, perform task number 1: they compare detailed information on the subject of oxygen and its allotropic variant - ozone, and then, based on the obtained information, they form infographics. The indicated couples present their studies on the class forum.

3. Participants analyze and comment on an interactive illustration showing the use of oxygen.

4. Students carry out the interactive exercises checking the level of knowledge learned during the lesson. The teacher initiates a discussion during which the correct solutions for all the exercises performed by the students are discussed.

5. The teacher plays the recording of the abstract. Every now and then he stops it, asking the students to tell in their own words what they have just heard.This way, students practice listening comprehension.

Summary

1. The teacher briefly presents the most important issues discussed in class. He answers the additional questions of the proteges and explains all their doubts.

Homework

1. Carry out task number nr 2.1.

The following terms and recordings will be used during this lesson

Terms

Texts and recordings

Oxygen: properties and application

Under normal conditions (0°C, 1013,25 hPa) oxygen is colourless and odourless gas that creates diatomic molecules.

In the upper atmosphere, under the influence of ultraviolet radiation, ozone is formed, a blue gas whose molecules are made up of three oxygen atoms – it is therefore an allotropic form of oxygen. It occurs in nature: it is formed mainly after a storm due to lightning discharges; it also occurs in coniferous forests.
Ozone has strong antiseptic properties. It destroys microbes, bacteria, viruses and fungi; it purifies the air and removes unpleasant odours. Its action is very strong but short‑term. Due to these properties, ozone, produced in laboratories, is used in medicine, rehabilitation, cosmetology and many industries.

Oxygen is widely used in medicine and various industries. Look at the interactive illustration and memorise where and what purpose oxygen is used.

• Oxygen is the most widespread element in nature.

• Oxygen is a colourless, odourless gas, slightly soluble in water, very chemically active.

• Allotropic oxygen form is ozone.

• Ozone occurs naturally but can be obtained in the laboratory.

• Ozone and oxygen are used in medicine, cosmetology, rehabilitation and many types of industry.