CHANGES DURING PUBERTYSCIENCE V

Review

Describe the following: ZygoteEmbryoFetus

Checking of Assignment

How does a pregnant woman feel?

Motivation• What changes do you

notice in the picture of Romeo from grade one to the present?

• Do these changes happen to you?

Presentation

• Recall the changes that have occurred in one's body since he/she was nine years old.

• Record changes in the notebook.

Tally answers in a table as shown: Changes Yes No In females:• Growth rate increase• Hips begin to broaden• Starts to look rounder and softer• Breasts become big

Tally answers in a table as shown: Changes Yes No In males:• Growth rate increases• Shoulders begin to broaden• Adam's apple becomes more

prominent

Physical Changes in boys and girls

Concept Formation

• Did all of you experience the same changes?

• How do you react to these changes?• How many are surprised?• How many are ashamed?

Concept Formation

• At the ages of 11 - 14, the human body enters a period of dramatic physical and mental changes referred to as adolescence or puberty.• Changes become noticeable at the

age of 9 for females and 11 for males.

Concept Formation

• During this period, the body begins to undergo changes in sexuality.• Puberty means a young person has the

ability to procreate or produce offspring.•When puberty begins, the girl start to

menstruate. Boys start releasing sperms in the semen which can fertilize the female's mature egg.

Concept Formation

• Changes in one's physical characteristics are mainly caused by chemical produced by the body, called hormones.• The male sex organs produce testosterone

while the female sex organs produce the hormone called estrogen and progesterone.

Application• What other changes

happen to male and female as they reach puberty?

• If you menstruate any day today, should you be afraid? Ashamed?

Evaluation Classify whether the following changes occur in boys or on girls. Rearrange the items under proper heading.

Girls Boys_______________ ______________________________ _______________

1. The breast begins to form.2. The shoulders become broad.3. The body becomes muscular.4. The Adam's apple enlarges.5. The hips become broader.6. The voice becomes deeper.

Answer:Girls

The breast begins to form.The hips become broader.

BoysThe shoulders become broad.The body becomes muscular.The Adam's apple enlarges.The voice becomes deeper.

Assignment

Paste a photo of you when you were a toddler. Then cut a photo of a teenager from an old magazine and paste this beside your photo. Take note of the changes that may have happen if you become the teenager in the photo.