Describe three ways for the efficient use of energy

State four ways for the judicious use of energy.

What is meant by the efficient use of energy. State the full form of I.E.A.

Describe the methods used for the manufacture of dihydrogen. How does it react with metals and non-metals ? Describe its important uses.

Define molecular mass. Describe three methods for the determination of molecular masses of gases.

Describe three types of transpiration.

Describe the sample space for the indicated experiment : A coin is tossed three times.

Describe the structure and the functions of three types of muscular tissue.

Describe the structure and the functions of three types of epithelial tissue.

Describe any three potential applications of genetically modified plants .

Which statement below best describes the ways that energy and pesticides are transferred between levels in food chains ?