HOW TO MAKE A DEVICE THAT MEASURES THE SPEED OF WIND

In this experiments you will make a  device that will measure the speed of wind!!!
Materials:

A square chart paper

Colors [green, yellow and red]

1toothpick

Aluminum foil as long as the chart paper’s width

1role of tape

HOW TO MAKE

Step 1: Color the chart in order written below

                   GREEN

                    YELLOW

                     RED

Step 2: Poke the toothpick through the corner of the green area.

Step 3:  Attach the aluminum foil to the toothpick with the help of tape

               Here your device is ready

HOW TO USE IT?

Put the device in a windy area. The aluminum foil will move.

If the aluminum foil is on green it means that the wind is very weak. If the aluminum foil is on yellow it is neither strong nor weak. If the aluminum foil is on red it means the wind is very strong

TIPS: DO NOT KEEP THE DEVICE ON LOW SURFACE WHILE USING IT AS IT WON’T WORK ACCURATELY. THE ALUMINUM FOIL SHOULD NOT CONTAIN ANY WRINKLES, FOR ACCURATE RESULTS. 


(Please review this experiment)

 

PROVING ROOTS ABSORB WATER FROM THE SOIL.

In this experiment you will prove that roots absorb water from the soil.

Materials

 

2 pots

1scissors

2 plants [same type]

Instructions

 Cut the root of one plant and plant it. Plant the second plant without cutting the roots. You can name the pot [A & B]

Water both the plant regularly and equally and treat the plants n the same way.

Observe: The plant which has roots is healthy, but the plant with no roots is weak.

Why is this so?

Roots help plants to absorb water from the soil.Water is required to make food by the plants.This is why the plant without the root looks weak.


(Please review this experiment)