plan in science

1. Quarter 4TH
GRADE LEVEL 8
WEEK FIRST WEEK LEARNING AREA SCIENCE
MELCS Explainingestion,absorption,assimilation,andexcretion. S8LT-IVa-13
Day Objectives Topic/s Classroom-based Activities Home-based Activities
1 Explainingestion,
absorption,assimilation,
and excretion
Explainthe actionof
enzymesascatalystsand
howit helpsindigestion
Processof ingestion,
absorption,
assimilation,and
excretion
Introduction:
Discussion:
Foodplaysacentral role inthe survival of species.Food
givesorganismsenergythat enablesthemto carry out
the many activities they do each day; this includes
predatorschasinga preyor a preyescapinga predator,
arboreal organisms climbing trees to gather fruits, or
fishswimminginschoolsin search for food,to name a
few. Organisms are able to obtain energy from the
foods they eat through digestion.
Digestion of food is carried out by the organs and
substances of the digestive system. During digestion,
food is broken down to smaller parts -- a fraction of
which is made up of nutrients. These nutrients are
circulatedtothe differentpartsof thebodythroughthe
bloodstream and assimilated by cells.
 Showingthe illustrationof howthe processof
digestionoccurs.
 The learnersare task to answer
learningtask1, A gutsygame
2 Explainingestion,
absorption,assimilation,
and excretion
Explainthe actionof
enzymesascatalystsand
howit helpsindigestion
Processof ingestion,
absorption,
assimilation,and
excretion
Learning Task 2
A SweetBreak!
Procedure:
1. Fill the twobeakerswithwarmwater.Make sure
that the amountof waterplacedineach glassisabout
the same.Label the glassesA and B.
2. Prepare twopiecesof candies.Wrapa piece of
candy ina paper towel andcrushit usinga mortar and
pestle orany hardobjectlike apiece of wood.
3. Place one piece of candy intothe glassof warm
waterlabeledA andplace the crushedpiecesof candy
inthe remainingglassof warmwaterlabeledB.
4. Observe howlongittakesfor the whole candyin
GlassA and the crushedpiecesof candyin GlassB to
dissolve.

2. 5. Record yourobservation.
Questions:
1. How doescrushingthe candy to smallerpieces
affectitsdissolution?
2. What doescrushingthe candy representinthe
processof digestion?
Learning Task 3
How do enzymesaffectdigestion?
Procedure:
1. Numberand label the testtubes(1-water,2-fresh
pineapple juice,and3-bromeliadleaf juice).
2. Prepare a bar or one tablespoonful of granulated
gelatininthe measuringcupusing100 mL of boiling
water.
3. Stir well withaspoonuntil the gelatinisdissolved.
4. Place 3 mL of waterintotesttube 1, 3 mL of fresh
pineapple juice intotesttube 2,and3 mL of Bromeliad
leaf juice intotesttube 3.
5. Add 10 mL of gelatinmixturetoeachtesttube.
Shake well tomix thoroughly.
6. Refrigerate the samplesovernight.
7. On Day 2, checkthe contentsof each testtube for
solidificationof the contents.
Recordyour observations.
Foodundergoesphysical andchemical change asit
movesfromone part of the gastrointestinal tractto
the other.Digestionmakesthe nutrientsfoundinfood
available tothe differentpartsof the bodyforthe
organism’snourishmentandoverall wellness.In
LearningTask 2, an enzyme calledbromelainwhichis
presentinfreshpineapple juice andinbromeliad
plantsisusedto demonstrate digestionof proteins.
Questions:
1. How didbromelainaffectthe proteinin gelatin?
2. Which of your observationsshowthiseffect?
3. There are otherkindsof enzymesinyourdigestive
system.Howdo these
enzymesaffectdigestion?
LIFE PROCESSES
Direction:Match the life processes incolumn
A withthe specificorganincolumnB
ColumnA
1. absorption
2. assimilation
3. digestion
4. egestion
5. ingestion

3. ColumnB
A. mouth
B. liver
C. small intestine
D. stomach
E. anus
3 Explainingestion,
absorption,assimilation,
and excretion
Explainthe actionof
enzymesascatalystsand
howit helpsindigestion
The learnerswill answer
“A journeyintothe digestive system”
 The learnersare task to answer
learningtask 4, they needtoillustrate
How doesfoodmove throughyour
digestive system?
4 Practice moderation
especiallyinintake of food
and drinks
Direction.Identifythe life processeswhichoccurs.
Write your answersonthe boxesprovided.
Why Do I needtoIntake Water?
Direction.Studyandanalyze the Figure below
and answerthe questions.
1. How much waterdo I needtointake every
day?ACTIVITIESstarch simple sugarptyalin
maltose maltase
2. What is the amountof waterreabsorbsby
my small intestine?
3. Where doesmostof waterreabsorption
happen?
4. How much wateriseliminatedbymybody?
5. How importantiswaterin the normal
functioningof mydigestive tract?
5 Explainingestion,
absorption,assimilation,
and excretion
Explainthe actionof
enzymesascatalystsand
howit helpsindigestion
Practice moderation
especiallyinintake of food
and drinks
 The learnerswill answerthe posttest Valuing
Draw a heart if the followingare practicedor
are foundinyourfamily.
1. My dietinclude rawfoodslike vegetable
salads,fruits,nutsandfruitjuices.
2. I drink10 glassesof waterperday
3. I do a lightexerciseaftereatinglike walking.
4. My familyprovidedaregularservingof
vegetablesandfruits.