Important question of 2021 syllabus

In our school Chapter 9,10,13,14,15,16,17&18 are coming so the important questions from these chapters are,Actually all the questions are very important but some questions which are very very Important they are: Q1.)Explain Reproduction.Why it is important? Q2.)What are the two modes of reproduction? Q3.)Define metamorphosis.Give example. Q4.)Different between Sexual and Asexual Reproduction? Q5.)Define Adolescence. When it begins? Q6.)What are the changes that place during puberty ? Q7.)Different between noise and music. Can music become noise. Q8.)What is electroplating? Q9.)Define electroscope. Q10.)Define Earthing. Q11.)How will you protect your self against earthquake: i.)If you are at home ii.)If you are outdoors Q12.)Define Incident and reflected ray. Q13.)Define regular and irregular reflection. Q14.)Define constellation. Q15.)What is meteors?

What are *** hormones? Why are they named so? Write their functions.