6 OUR SOLAR SYSTEM IS A VERY SMALL PART OF ONE OF BILLIONS OF GALAXIES IN THE UNIVERSE

Task 2: An hourglass

Topic: time

Level: Primary (1.–5. Graders)

Thematic Unit:

Subject: national history and geography

Recommended age of pupils: 6–11 years old or older

Time allocated: 2 lessons

List of equipment needed for pairs of pupils:

A PET bottle, a thin tube, a dropper, a nail, a burner or a gas stove, a bowl, a felt-tip pen

Equipment for the teacher:

http://www.fyzikahrou.cz/fyzika/hracky-a-modely/merici-pristroje

List of practical (research) activities:

Description – a brief summary:

The aim of the activity is to get acquainted with different types of clocks.

Description – Individual sections of the first lesson


	Work content	Time	Material and equipment needed	Teacher’s activity	Pupils’ activity
Introduction to topic - motivation	Making a water clock.	2 lessons	A PET bottle, a thin tube, a dropper, a nail, a burner or a gas stove, a bowl, a felt-tip pen	Describes the importance of water clocks. Manages and assesses pupils’ activities.	In the form of a group work, they make a water clock.
Pre-laboratory preparation	Dividing pupils into groups, motivation, formulation of the target, assessment, a worksheet.	10 minutes	A PET bottle, a thin tube, a dropper, a nail, a burner or a gas stove, a bowl, a felt-tip pen	Divides pupils into groups, motivation, formulates the target, introduces the assessment to pupils, distributes the worksheets, and supervises pupils when working.	They complete the worksheet with tasks, cooperate within the group, and ask the teacher questions.
Practical (research) activity	Creation of a water clock.	30 minutes	A PET bottle, a thin tube, a dropper, a nail, a burner or a gas stove, a bowl, a felt-tip pen	Pays attention to pupils, makes a hole into the lids and bottom of the bottles.	They make a water clock.
Evaluation wof lessons	Summary, advantages and disadvantages of water clocks.	5 minutes		Controlled discussion with pupils.	They ask the teacher questions.

Preparation of the teacher:

Description of the activity: http://www.fyzikahrou.cz/fyzika/hracky-a-modely/mericipristroje

Questions:
1) What will the speed of water drip depend on?
2) Pour water into the bottle and estimate the time of water dripping.
3) Using a stopwatch, measure the water dripping.
4) Where can you use a water clock?