1st CO SCIENCE
1st CO SCIENCE
1st CO SCIENCE
I. OBJECTIVE
A. Content Standard The learners demonstrate understanding of the different
characteristics of invertebrates.
B. Performance Standard The learners should be able to make an inventory of
invertebrates that are commonly seen in the community.
C. Learning Competencies / The learners should be able to determine the distinguishing
Objectives characteristics of invertebrates.
II. CONTENT
Invertebrates
III. LEARNING RESOURCES
A. References
1. Teacher’s Guide pages MELCs page 383
2. Learner’s Materials pages Self -Learning Modules
3. Textbook pages
4. Additional Materials from
Learning Resource (LR) Portal
B. Other Learning Resources Powerpoint Presentation
A. Reviewing previous lesson or What are invertebrate animals? How many groups of invertebrate
presenting the new lesson animals are there?
Identify some animals belong to the different group of invertebrate
animals fill the table below
INVERTEBRATE ANIMALS
Group Animals
Sponges
(Poriferans)
Mollusks
Cnidarians
(Stinging-
cell
Animals)
Arthropods
Echinoderm
s
Flatworms
Round
worms
(Nematods)
Segmented
worms
(Annelids)
B. Establishing a purpose for the PUZZLE:
lesson W-H-A-T --AM--I?
Here are some riddles. Choose your answer from the pictures
below. Write your answer on the blank after each statement
I am flat, segmented and very long. My home is your intestine. We
eat the same foods together. What am I? __________
My home is wet soil. My body is segmented. My best friends are
farmers. What am I? __________
Do this:
Look for a slaughterhouse near your place and bring forceps or
gloves and bottles half-filled with 70% ethyl alcohol.
1. Ask the help of a butcher and collect the available worms in
the slaughterhouse using the forceps and place them in
your collecting bottles.
2. Take note of the part of the body where you got the worm.
3. Bring the specimens home and study them. Try to compare
them with the diagram below.
Which of these worms did
you collect in the slaughterhouse?
C. Presenting Examples/Instances of
new lesson Unlocking of Difficulties:
Match column A with the correct answer in column B
Column A Column B
1.endoskel Scientist
eton who
studies the
life cycle of
insects
their
behavior
and how to
control
them
2.Exoskelet Body parts
on connected
to the
main part
of the
body
3. A series of
Appendag major
es changes
from larval
form to
adult form
4.Entomol An internal
ogist skeleton
that
provide
support
and
protection
and act as
a brace for
muscles to
pull
against
5.Metamor A system
phosis of fluid
closed
tubes
Water Outside
vascular shell
system composed
of bony or
horny
material
Present the problems to the pupils then let them give their
hypothesis.
Unlocking of Difficulties:
Choose from the boxes the correct definition of the words below
a. Segmented
b. Hermaphrodite
c. Parasite
d. Acoelomate
Present the problems to the pupils then let them give their
hypothesis.
What are the different characteristics of the following groups of
animals?
a. Flatworms
b. Segmented worms
c. Round worms
Video viewing
Graphic organizer:
INVERTEBRATES
Segmented Worms
Mollusks
(Annelids)
Have body segments that allow (Soft Bodied Animals)
for specialization of tissues and Coelomate animals with
for efficient movement bilateral symmetry, soft internal
Bodies are divided into segments body, a digestive tract with 2
with a ringed appearance openings and a muscular foot
Live almost anywhere except and a mantle. Found in
Polar Regions aquatic(ocean & fresh water)
Have bilateral symmetry like and moist land environment
flatworms but have two openings They use a rasping structure
like round worms called radula to scrape food into
their mouth . some have open
and close circulatory system.
CNIDARIANS
(Coelenterates)
They have one body opening and most Echinoderms
have two layer cells (Spiny-skinned animals)
Outer layer- protecting the internal Are marine animals with spiny
body
endoskeleton.
Inner layer- for digestion
They are made of tissue and have
They have water vascular system,
radical symmetry tube feet and radical symmetry as
Adapted to aquatic, floating, sessile adult.
attachment to surfaces under the Madreporite is the strainer like
water. With two general body forms structure of an echinoderm
Polyps-cylindrical with mouth and Almost all echinoderms have an
tentacles internal nskeleton that serves both
Medusa – shaped like an upside down
as support and protection. Spiny
bowl with mouth and tentacles facing
forward
projections on the plate stick out
of the skin.
Flat worms:no digestive system, thin flat acoelomate animals
that can be freely living or parasitic, they are hermaphrodite
because they can produce eggs and sperm cells.
Arthropod
They make up the largest group in the animal kingdom
¾ of all known are arthropods
Characterisitcs:
Segmentation: segmented bodies allowing for efficient and complex
movement. Have three body parts 1. Head 2. Thorax 3. Abdomen
Exoskeleton: provides framework for support and protects soft body
tissue
Jointed appendages: adapted for feeding, sensing, walking, swimming and
mating
Feeding habits and Structure: mouthparts include a pair of appendages
called mandible is adapted for chewing and biting. Depending on their
feeding habits, mouth parts of other arthropods have feathery strainers,
sucking straws and stabbing needles
5. Evaluating Learning Direction: Read the problem then choose the letter of the correct
answer.
1. Which among the following animals has many pores or openings
in its body?
a. ascaris c. sponge
b. earthworm d. tapeworm
2. Mollusks with two valves are also called:
a. bivalves c. trivalves
b. gastropods d. univalves
3. Jellyfishes are noted for their powerful tentacles. What are their
tentacles for?
a. for excretion c. for reproduction
b. for digestion d. for capturing food and defense
6. Additional activities for List down ways of caring for the invertebrate animals.
application and remediation
V. Remarks
VI. REFLECTIONS
A. No. of learners who earned 80%
on the formative assessment
B. No. of learners who require
additional activities for
remediation who scored below
80%
C. Did the remedial lessons work?
No. of learners who have caught
up with the lesson
Prepared by:
Margie G. Rivera
Grade VI Teacher
Checked by:
Goodwill C. Guintu
School Head