Why is mercury used in thermometers?
Q3. A) Name two plants that have tap roots.
B) What is the function of stem in a potato plant?
Q4. A) Name two non- brittle substances.
B) What is charred sugar?
Answers
Answered by
1
Answer:
1) tap root= Carrot, beetroot, turnip
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0
Answer 1 :
In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube. With changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale.
Answer Q3 :
A) Carrots and beets
B) Their main function is to provide support to the plant, holding leaves, flowers and buds; in some cases, stems also store food for the plant.
Answer Q4 :
A) ceramic and glass
B) When sugar is continuously heated in a dish, then it starts evaporating and becomes foggy due to water vapour. A black powdery substance is left behind, which is charcoal. This process is called charring of sugar.
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