(i) Solar energy is the energy generated by the sun. The radiations of the sun are capable of creating energy from the sun. It is created with the help of nuclear fusion. Nuclear Fusion takes place when protons of hydrogen atoms collide in the sun’s core and fuse to create a helium atom. This process is also known as the proton-proton chain reaction.
(ii) Nucleus has different meanings in different perspective. Nucleus is the positively central part of an atom. The atom is divided into three parts mainly electron, proton, and neutron.
electron + proton = neutron
(iii) Combustion is the exothermic reaction. The reactions that place in the presence of oxygen. For example - Burning of a candle.
(iv) Fission is the process of divison or splitting of atoms into two or more parts. In this process, the parent atom splits into two daughter nuclei. It is a type of nuclear reaction. For example - the splitting of Uranium - 235.
(v) Energy is the capacity of doing work. The formula of energy is Power*time. It is measured in joule.
(vi) Photosynthesis is the process by which plants make their own food using sunlight, carbon dioxide, and water to form oxygen and nutrients.
(vii) Atom is the smallest part of an element that is divided into three parts electron, proton, and neutron.
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