|
how to make a volcano - science fair experiments for kids |
½
cup water
½ cup vinegar
3 tbsp. baking soda
Clay / Garden soil
Jar
Red food colouring
¼ cup liquid detergent
| 1. |
Ask
the children to build a small hillock using clay or soil from
the garden. |
| 2. |
Twigs
can be used to decorate it. |
| 3. |
Dig
out mud from the peak of the hill to form a crater where the
jar can fit in. |
| 4. |
Put
baking soda in the jar. |
| 5. |
Fix
the jar in the space made at the top of the hill. |
| 6. |
Mix
together water, liquid detergent, vinegar & some red colouring. |
| 7. |
Pour
the mixture into the jar. |
| 8. |
Smoke
and lava will start pouring out. |
Terrariums
are miniature gardens enclosed in glass. They require a minimum
of care as the moisture that the plants absorb from the soil is
given off through the leaves by the process of transpiration. This
condenses on the glass walls and runs down to moisten the soil again.
A well-constructed terrarium requires only light and warmth to flourish.
Container - any clear glass or plastic container can be used, if
it will admit light and allow the plants to be seen. Fish tanks,
fish bowls, pickle jars, bottles all make attractive displays. If
they do not come equipped with a lid, a sheet of clear plastic or
glass makes a suitable cover. Cling film can also be used. The neck
of the container should be big enough for you to be able to put
the plant inside.
Plants - Most plants recommended for terrariums are moisture-loving
types which never become large. Apart from cacti and succulents,
almost all house plants are suitable. Choose plants with similar
requirements for temperature, light and water.
Container
Plants
Gravel
Red sand (bajri)
Charcoal pieces
Peat mixture (potting soil)
Lid or cling film
Paper
| 1. |
Clean
the container. |
| 2. |
Wash
and dry the gravel, charcoal and red sand. |
| 3. |
Make
a funnel with the paper and pour in the gravel. If you wish
to add a landscape effect, make hills and valleys with the gravel. |
| 4. |
Pour
a layer of charcoal |
| 5. |
Add
red sand. |
| 6. |
The
last layer would be of peat. |
| 7. |
Lower
the plants carefully into the container. Press the roots into
the soil. |
| 8. |
Sprinkle
¼ cup of water all over the terrarium. |
| 9.
|
Seal
the container with a lid or cling film. |
The
Peat mixture is easily available at nurseries.
Place
the terrarium in a well lit area but never in direct sun. Add ¼
cup water once a month.
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