Question

are you ready for the test​

Answer 1

Answer:

1.Chemical reaction

in a chemical reaction the atoms of the reacting molecules or elements are rearranged to form New molecules hold chemical bonds between atoms are broken and a new chemical bonds are formed born breaking absors energy virus bond formation releases energy.

5. periodic classification of elements

Henry mostly a British scientist in 1912 discovered a new property of elements called atomic number which provided Idea better basis for the periodic arrangement of the elements the physical and chemical properties of the elements are there periodic functions of their atomic numbers. in the periodic table there are 7 periods and 18 groups the horizontal rows are called periods the vertical columns are called groups group 1S alkali metal group 2 alkaline earth metal group 3 to 12 transition metal 13 boron family 14 carbon family 15 nitrogen family 16 oxygen family 17 halogens 18 noble gases

9.Heridity

Gregor johann mendel is thefather of genetics

mental done monohybrid cross under dihybrid cross monohybrid cross tall under dwarf plants are produced in dihybrid cross the colours and shape will produce in monohybrid cross he pure breeding tall plant and the pure reading dwarf plant in the I have a class he few breeding pea plant having round yellow seeds with your breeding pea plant having wrinkle green seeds

13.Electricity

electric current is defined as the rate of law of charge in a conductor the SI unit of electric current is empire and ohm's law according to ohm's law at a constant temperature the study current I flowing through a conductor is directly proportional to the potential difference between the two ends of the conductor unit of resistance is ohm unit of resistivity is row and then heating effect of current juice laugh heating h equal to heating states that the heat produced in any proportional to the square of the current for which the current is passing through the resistor.

14.Source of energy

solar energy biogas Shail gas wind energy water energy tidal energy electrical energy