List of top Science Questions

What is the difference between xylem and phloem ?
How is DNA the basis of heredity ?
What is photosynthesis ? Describe it with a suitable diagram.
Define respiration.
What are the harmful effects of aerosol chemicals ?
Write the names of four organelles of a cell.
What is excretion ? Write the names of its two main parts.
What is phototropism ?
What is pollination ?
What is the difference between an atom and an ion ?
Define ores.
What do you understand by short and long periods of periodic table ?
Why have detergents replaced soap ?
What is energy crisis ? Mention the measures to resolve it.
What are fossil fuels ?
What is an indicator ? Write the name of an indicator.
Describe the structure and working method of a biogas plant.
What is dynamo ? What is its use ?
Write three information obtained from chemical equation.
Why is inert gas filled in electric bulb ?
What are defects of vision ? What are their types ? How are the defects resolved ?
What is called the best source of energy ?
What do you understand by potential difference ?
What do you understand by electromagnetic induction ?
Why is an aqueous solution of sodium carbonate alkaline ?