Topic: Proteins – elemental composition

Target group

Elementary school student (grades 7. and 8.)

Core curriculum:

Primary school. Chemistry.

X. Chemical substances of biological importance. Pupil:

5) lists the elements whose atoms are part of protein molecules; defines proteins as compounds arising as a result of condensation of amino acids.

General aim of education

The student lists and identifies elements whose atoms are part of protein molecules

Key competences

• communication in foreign languages;

• digital competence;

• learning to learn;

• mathematical competence and basic competences in science and technology.

Criteria for success
The student will learn:

• what elements are included in the proteins;

• what are proteins;

• indicate in which foods proteins are present;

• state the importance of proteins in the body.

Methods/techniques

• activating

  • discussion.

• expository

  • talk.

• exposing

  • film.

• programmed

  • with computer;

  • with e‑textbook.

• practical

  • exercices concerned.

Forms of work

• individual activity;

• activity in pairs;

• activity in groups;

• 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. The teacher recalls the class participants to the abstract and asks you to read the experiment's instructions. Students formulate a research question and hypothesis, and then write it in the form in an abstract. The teacher displays the film, the students record their observations and conclusions (in the form). The teacher encourages the class to discuss the observations made.

2. The teacher recalls the class participants to the abstract and asks you to read the experiment's instructions. Students formulate a research question and hypothesis, and then write it in the form in an abstract. The teacher displays the film „Testing the elemental composition of proteins”, the students record their observations and conclusions (in the form). The teacher encourages the class to discuss the observations made.

3. Students, working individually or in pairs, carry out interactive exercises to check and consolidate knowledge learned during the lesson. Selected people discuss the correct solutions for interactive exercises. The teacher completes or straightens the statements of the proteges.

Summary

1. The teacher asks the students to finish the following sentences:

   • Today I learned ...

   • I understood that …

   • It surprised me …

   • I found out ...

   The teacher can use the interactive whiteboard in the abstract or instruct students to work with it

2. The teacher asks students to carry out the recommended interactive exercise themselves.

Homework

1. Listen to the abstract recording at home. Pay attention to pronunciation, accent and intonation. Learn to pronounce the words learned during the lesson.

2. Make at home a note from the lesson using the sketchnoting method.

The following terms and recordings will be used during this lesson

Terms

Texts and recordings

Proteins – elemental composition

How is the human body built?

The main components of the human body are water (approx. 65%) and proteins (approx. 20%).

What are proteins and what elements are they made of?

Proteins are substances, the molecules of which are composed mainly of carbon, hydrogen, oxygen and nitrogen atoms.

The unpleasant smell of spoiled eggs is caused by the formation of hydrogen sulphide, a compound with the formula ${\text{H}}_{\text{2}}\text{S}$. Based on this, we can make a conclusion that proteins also contain sulfur. Some proteins also contain phosphor, less frequently copper, iron, zinc, magnesium and iodine.

• Molecules of all proteins are composed mainly of atoms of four elements: carbon hydrogen, oxygen and nitrogen. Some proteins may contain atoms of sulfur, phosphor and other elements.

• Proteins are substances, the molecules of which are composed mainly of carbon, hydrogen, oxygen and nitrogen atoms.