A Detailed Lesson Plan in Science IV

I.            Objectives

At the end of the lesson, pupils are expected to:

a.    Define mixture

b.    Differentiate homogeneous from heterogeneous mixture

c.    Appreciate their own identity

d.   Participate actively in class discussion

II.         Subject matter

Topic: Mixtures

Reference: Science for active learning 4 by Lilia G. Vengco, pages 128-143

Science Link 4 by Fides P. Balatbat, pages 198-201

Materials: charts, concrete materials

III.       Procedure

A.   Preliminary activity

Teachers Activity

Student Activity

1.   Energizer I have here a song entitled “Old Mac Donald” I’ll sing it first then afterwards we will sing it all together. It goes like this “Old Mac Donald” Old MacDonald had a farm, Ee i ee i oh! And on that farm he had some chickens, Ee i ee i oh! With a cluck-cluck here, And a cluck-cluck there Here a cluck, there a cluck, Everywhere a cluck-cluck Old MacDonald had a farm Ee i ee i oh! 2.   Review Last time you have discussed about seed germination, now let’s move on to our new lesson but before that let’s have first the activity that I have prepared. I have here papers with numbers at the top and letters at the bottom.  I need volunteers to arrange the numbers from highest to lowest to from the word from the letters. 2 4 5 3 6 8 7 9 s r u e t i x m

B.   Presentation

Teachers Activity

Pupils Activity

What word was formed? What do you think is our lesson for the day? I have here one empty container and some ingredients of halo-halo (sliced banana, black mungo beans and sago) Let’s put the ingredients together in an empty container. What do you observe? Can you give other term for combine? What do you call if substance that are put or mix together? Can you give the definition of mixtures based from your observation on what I’ve presented you a while ago? Mixtures are combination of two or more than one substances. The substances in a mixture retain their characteristics and properties Try to look on the example that I’ve presented a while ago. Are there any changes happened to any of the ingredients? The banana is still banana, same goes with other ingredients. They are only physically combined but not chemically. Physical combination implies that the substances do not undergo changes Mixtures maybe classified into two, what are they? I have here two containers that contain water. I’ll put a marble to one of the container and powdered juice to the other container. Then let’s mix it. What have you noticed on the first container? Can you still see the marble separately from the water? Are the materials uniform in appearance with each other? So the materials are still distinguishable. What makes once material different from the other? How many phases are there in the first container? If you mixed one material with the other and the original material can still be distinguishable and has a phases this kind of mixture as called heterogeneous What have you observed on the second container? Can you still see the powdered juice separately from the water? So the materials can’t be identified anymore. What phase is the powdered juice before we have mixed it with the water? How many phases are there on the second container? What is this phase? When we are talking about mixture we are not only pertaining to liquid or solid materials we can also use gas for example air To which classification of mixture does air belong? That’s correct because we can’t identify the elements in the air Air has oxygen right? Can you identify the oxygen in the air? So air belongs to homogeneous

C.   Discussion

Teachers Activity

Student activity

What are mixtures? What are the two classifications of mixtures? When can we say that a mixture is a heterogeneous? What else? How many phases are there If the mixture is heterogeneous? Can you give examples of heterogeneous? Are materials or substances in a fruit salad still distinguishable after you mix it? When can we say that a mixture is homogeneous? What else? How many phases are there if the mixture is homogeneous? Can you give examples of homogeneous mixtures?

D.   Generalization

Let’s sum up what we have discussed; I have here a graphic organizer. All you need to do is to provide the details for each box.

E.   Application

Teacher activity

Pupils activity

Mixtures can’t only be applied to substances it can also be applied to us human, for example is the classroom we are the materials that are mix together in a container which is the classroom and after we have mixed, can you still identify your friends? What do you call that kind of mixture? How about if twins are put together, can you still identify who is your friend? You can’t identify because they have the same characteristics unless you have the sign like one has a mole. What kind of mixture is that? How will you value your identity?

F.   Evaluation

Identify the following whether they are homogeneous or they are heterogeneous mixtures

1.   orange

2.   alcohol

3.   fruit salad

4.   air

5.   chicken noodle soup

Answers:

1.   homogeneous

2.   homogeneous

3.   heterogeneous

4.   homogeneous

5.   heterogeneous

G.   Assignment

Study about types of mixtures on pages 132-133