EVERYDAY SCIENCE - WATER CYCLE
Question 1

Ace made a terrarium by placing a plant in a glass jar containing damp soil. He then sealed the jar.

He placed the terrarium in his balcony where the plant is able to obtain sufficient sunlight.

The plant in the terrarium was still alive even though he did not water the plant for a year!

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Answer 1

Fill in the blanks with the keywords provided below.
[lose heat] • [photosynthesis] • [inner surface] • [decomposing] • [condense] • [combine] • [evaporates] • [water]

a) Water from the damp soil evaporates into water vapour that rises into the air inside the bottle. Explain why, other than the soil, the plant also adds to the amount of water vapour in the air inside the jar.

Answer:

The roots of the plant absorb from the soil. Water is transported up the stem in water-carrying tubes to the leaves. Water inside the leaves and escapes through the stomata into the air as water vapour.


b) Ace observed that, even though water continuously evaporates from the soil, the soil remains damp even after 1 year. Explain why the soil remains damp.

Answer:

When water vapour touches the cooler of the jar, it will and into water droplets. The water droplets and become heavier. They then drip back down into the soil.


c) Seeing that Ace’s terrarium survived well, Churros made one too. He placed some mushrooms (instead of a plant) in a jar and put some dead leaves on the soil. He then kept his terrarium in a closed cupboard. Churros’ mushrooms also survived for a year. Explain why they survived even though they did not receive light.

Answer:

The mushrooms do not need light for . They are able to obtain food by the dead leaves in the soil.




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“One of the longest surviving terrarium is almost 60 years old! Read more from this website.”