Please select a subject first
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Long answer question.
Do plants need oxygen? If so, what is its source?
Concept: undefined >> undefined
Answer the following in one word.
Which organ is called the voice box?
Concept: undefined >> undefined
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Tick the most appropriate answer.
Exhaled air contains
Concept: undefined >> undefined
Tick the most appropriate answer.
Plants have these for the exchange of gases.
Concept: undefined >> undefined
Analogy:
Echinodermata: ______:: Soft Bodies Animals: ______.
Concept: undefined >> undefined
Fill in the blan
An ________ is a homogeneous mixture of two or more metals.
Concept: undefined >> undefined
Fill in the blank
Chalk powder dissolved in water is an example of a Chalk powder dissolved in water is an example of a _________.
Concept: undefined >> undefined
Name the technique that you use if only the solid component of a solution is required.
Concept: undefined >> undefined
Define matter.
Concept: undefined >> undefined
Differentiate between an atom and a molecule.
Concept: undefined >> undefined
Differentiate between an atom and a molecule.
Concept: undefined >> undefined
What do you observe when :
a piece of paper is burnt
Concept: undefined >> undefined
What do you observe when :
solid ammonium chloride is heated
Concept: undefined >> undefined
What do you observe when :
an iron nail is kept in tap water for few days
Concept: undefined >> undefined
What do you observe when :
a spoon of sugar is heated in a pan
Concept: undefined >> undefined
Fill in the blank
A new substance is always formed in a _______ change.
Concept: undefined >> undefined
Fill in the blank.
Melting of ice is a _______ change.
Concept: undefined >> undefined
Fill in the blank
Burning of fuel is a _______ change.
Concept: undefined >> undefined
State whether the following is physical or chemical changes.
burning of wood -
Concept: undefined >> undefined
