Science

1. SCIENC
E
REVIEW
WEEK5

2. Responsible Living with
Matter

3. Introduction
You live in a world of matter. Every
day you use matter in your various
activities. As you depend on matter,
you recognize the need to use matter
responsibly and safely.

4. Proper waste disposal and
management can be done by
applying the 3R – Reduce, Reuse
and Recycle. Reducing means
the amount of trash/garbage
produced. Reusing refers to using
materials more than once while
recycling means creating new
PROPER
WASTE
MANAGE
MENT

5. • Having a proper waste management can result
in the availability of valuable materials to
This can save money while potentially creating
new jobs and business opportunities. Reducing,
reusing and recycling your waste is important
for the environment, but it can also be
profitable.
What is the best waste
management?
• Recycling. Recycling saves energy, helps keep
Importance of Proper Waste
Management

6. • Do not buy
more than
what you need.
• Reduction of
transportation that
uses gasoline. (It
harnessed from the
underneath the
ocean floor.)
RED
UCE
When you use only those resources that you truly need, you use
fewer resources and in the end, you throw away fewer things and
therefore help to reduce the world's waste. In this way you also
contribute toward reducing the use of materials that could harm
the environment.
Waste reduction is considered the most effective way of managing
the world's garbage. You can observe this through the following
ways:
• Reduce
consumption
of Energy
• Reduce your
use of paper.
• Reduce your
use of water.

7. To reuse an item is to use it again even
after it has served its primary purpose.
Passing of things
to siblings.
(textbooks,
materials, etc.)
REUSE
Utilizing both
sides of papers.
Donating the
clothes no
longer fit you.
Opening gifts, do
not carelessly
tear the wrapper
you can reuse it.

8. RECYCLE
• When melted
usingheat, glass
and metal scraps
can be molded into
new products.
Transforming them into new things/items that
serves a different purpose.
• Old newspaper
can be cut into
small pieces and
turned into a
material called
mulch.
• Plastic bottles
cab be used
as containers.

9. Waste recovery involves getting materials or
substances from garbage and having these
processed then reused.
Cell phones
become obsolete
as new models are
developed. (sell
your old phones –
Instead of
buying new
ink cartridge
for your
RECOVER

10. Adjustme
nt of
Clothes
Some materials are deemed useless
because they are broken or some parts
are not functioning properly.
Repairing of
Shoes/bag
instead of
buying right
away.
REPAIR
Repair
first before
Replaceme
nt

11. WEEK 6
The Human
Reproductive
System

12. The Human Reproductive
System
● You may not be able to recall some
events of your life especially when you
were little. However, did you know that
you were once a tiny cell in your
mother’s womb? From that cell, you
came to be a human being through
reproduction, or the process by which
living things produce offspring of their

13. The Female and Male
Reproductive Systems
Each person has a reproductive system that involves organs resp

14. The Female Reproductive System
The main function of the female
reproductive system is to produce eggs
(ova) to be fertilised, and to provide the

15. The Female Reproductive System
Each part plays an important role in
reproduction. The ovaries are the primary
reproductive organs of females. They release
cells called egg cells or ova in a process
known as ovulation. They also produce and
secrete estrogen, a hormone responsible for
the development of secondary sex
characteristics among girls, such as the
development of breasts and broadening of
hips. Secondary sex characteristics are
specific traits for males and females that
develop during puberty. The fallopian tubes
serve as the passageways for the egg cells as
they travel from the ovary to the uterus. The
uterus, also known as the womb, is the part
The cervix is the narrow muscular end of
the uterus. Its opening expands during
childbirth to allow the baby to pass through
the vagina. The vagina is the female sex
organ where the semen that contains the
The birth canal is
the passageway of
a baby during

16. The Male Reproductive System
The male reproductive system has
the main function of producing
sperm cells, or the male sex cells.
To carry out this function, the male
reproductive system is made up of
the following parts.
The testes are the main reproductive organs of males. They are contained in the
scrotum, a sac of skin located below the penis. The testes produce millions of sperm
cells. The testes also produce testosterone, a hormone responsible for the development
of secondary sex characteristics among males, such as growth of facial hair and
formation of pimples. The sperm cells mix with a thick, whitish fluid that is producedi
by the prostate gland and serves as nourishment for the sperm cells. The fluid mixes
with the sperm cells and is released through the penis as semen. The vas deferens is a
tube-like structure that serves as a passageway for the semen when released during
sexual intercourse. The penis is the external male organ that releases semen and urine

17. Reproductive System and
Fertilization
Fertilisation occurs when a sperm
fuses with the female act during
intercourse and further forms an
that gets implanted in uterus of
female. The sperm travels through
fallopian tube and penetrates the
zona pellucida layer of the ovum

18. Proper Care for the
Reproductive
System