The goal: to find out whether families of students in our class, brushing their teeth, use water sparingly. To form water-saving skills.

Duration: one week.

The number of participants: 18 families, 66 people.

Conclusion: the families of students in our class are able to save water.

We analyzed properties of amber: It doesn't melt in hot or cold water, but it drowns. Burned amber emits the smell of resins. It can have yellow, blue, green, black, brown colors and it can be cloudy or clear. 

2. We strongly blew the air into the bottle. The burning candle which was behind the bottle extinguished.

Conclusion: the air flow divides in front of the bottle and it interflows behind the bottle. The candle extinguishes, because an air vortices forms behind the bottle.

2. The piece of paper towel slowly sinks.
Conclusion: Metals are heavier than the water, therefore the metal objects should drown. However the water surface is like a membrane and it can keep afloat the small light objects.

3. Hold the plastic spoon above the mixture of salt and pepper, and slowly lower it down. What happened?4. Lower the spoon still below. What happens now?
Conclusion: The rubbed plastic spoon in the piece of wool cloth electrifieds. Electrified objects attract other objects. First of all the spoon  attracts the light peppercorns, and lowered down it attracts even heavier salt crystals. 

2. Place the barometer on the windowsill. Affix the sheet of paper with scale next to the window glass.

3. Watch how the location of the straw changes every day.

Conclusion: When it's fair weather the air more pressures and tightens the balloon's cloth than when it's sleety weather. So, when the weather is getting better the straw will point upwards and when the weather is getting bad the straw will point down.

2. Poke the arm above the elbow now. How many pricks of tips did you feel?3. Poke the same place above the elbow with the spreaded pencils. How many tips of pencils did you feel now?
Conclusion: there are a lot of sensitive specks for touching in our finger pads, therefore your fingers are feeling both tips of pencils. These specks are less distributed above the elbow, therefore we're feeling both tips only  then, when we spread pencils. 

Activity instructions: we rubbed the blown-up balloon through our hair. We held the balloon in front of the can and we pulled it towards us. The can started to roll and it followed the balloon. 

Conclusion: An electrified from the hair balloon attracts the metal can.

You'll need: the empty bottle, a balloon, a straw.

Insert the balloon into the bottle and try to blow up it. Well as hard as you try to you'll notice it's impossible. Insert a straw into the bottle near the balloon so that the end of the straw would be sticking out of the bottle's neck, and try to blow up the balloon once again. What's happening now? The balloon fills the whole bottle.It happens only when the air inside the bottle is pressed by blowing up the balloon and the air can go out through the straw.