PURE or MIXStrategic Intervention Material

(Chemistry Grade 7)

CRISTINA SUBIERA TARRIGATeacher III

Pinili National High SchoolPinili, Ilocos Norte

PURE or MIX

TITLE CARD

Least mastered Competencies

• Recognize that substance has a unique set of properties• Investigate the properties of substances and mixtures

(K to 12 G7 Curriculum Guide Quarter 1)

WHAT TO WHAT TO DODO

Pure substances and mixtures are something you’ve certainly heard before. These are common materials maybe in the form of foods, drinks, medicines, agricultural products, industrial materials and most of the things we use everyday.

In this Strategic Intervention Material, you will act as a scientist. You need to find out the number of phase and the components of pure substances and mixtures and at the same time, you will discover the similarities of a pure substance with solution which is a classification of a mixture. Your job is challenging and exciting although pure substances and mixtures are very common to us, sometimes people are misled about the differences of these groups of materials we are dealing with everyday. Through this, you will learn and help people around you on a deeper idea about the differences of pure substances and mixtures and their importance to the living system.

Good luck!

GUIDE CARD 1

I am Pierre Curious and I want to study deeper about pure substances and mixtures. My tasks

include:1.Perform a science investigation on the differences of pure substances and mixtures;2.Identify which are pure substances and mixtures based on their a. Number of phase b. Number of component materials; and3. Recognize the importance of pure substances and mixtures to the living system and environment.

Don’t worry, I’ll be sharing you about the challenge given to me.

WHAT TO WHAT TO DODO GUIDE CARD 2

“PHASE ME”

To start the investigation, prepare the following

materials:3 beakers, 200 ml-graduated cylinder, 10 grams salt, 300 ml water

1tsp of corn seed, mongo, and beans

1. Put 100 ml of water on each of the beaker.2. Label 1, 2, and 33. Put the corn seed, mongo seed and beans in beaker 2.4. Put the 10 grams of salt in beaker 3. Stir. 5. Observe how many phases are there in each set-up.6. Fill in the table with your observations.

Beaker Numberof phase

1. 100 ml water

2. 100 ml water, corn seeds, mongo seeds, bean seeds

3. 100 ml water and 10 g salt

ACTIVITY CARD 1

What to do?

To sum up the idea in this activity, arrange the jumbled letters in the statement.

WHAT TO DO?Prepare the following materials:Graduated cylinder,5 beakers,10 grams of brown sugar, 10 ml of oil, 10 ml of alcohol, 10 ml of acetone 10 grams of salt and

200ml water

1. Label the beakers from 1 to 5 8. Mix the material in beaker 1 and 2. 2. Put the 10 grams of salt in beaker 1 Observe how many phase/s.3. Put the 10 grams of brown sugar in beaker 2. 9. Mix oil with water. Observe how many4. Put 10 ml of oil in beaker 3 phase/s.5. Put 10 ml of alcohol in beaker 3 10. Mix alcohol and acetone. Observe how6. Put 10 ml of acetone in beaker 4 many phase/s.7. Observe how many phases does each set-up has.

Beaker Number of phase Homogeneous/Heterogeneous

(1) 10 g salt

(2)10 brown sugar

(3)10 ml oil

(4)10 ml alcohol

(5)10 ml acetone

10 salt+10brown sugar

Oil + water

Alcohol + acetone

ACTIVITY CARD 2

TAKE A CLOSER LOOK

Read and analyze the

pictures. This is important in order that you

can accomplish the table of Activity 3.

ACTIVITY CARD 3

Material Numberof Phase

Solid Liquid Gas Homogeneous orHeterogeneous

Direction: Fill-up the Table below with the appropriate answer.

MIXED-UP

Analyze the figure below and fill in the table with the appropriate answer.

ACTIVITY CARD 4

Materials Number of Phase

Homogeneous or

Heterogeneous

Pure Substance or

Mixture

1. Coca cola

2. Gold

3. Vinegar

4. Distilled Water

5. Mineral Water

6. Halo Halo

7. 40 % ethyl alcohol

8. Salt solution

9. Refined sugar

10. perfume

COUNT ME

Direction: Fill in the missing letters in the given puzzle below to find out the correct word. Good Luck!

1.A pure substance is formed when sodium and chlorine combined. These two substances produced a compound which is safe to eat and does not react with water.

2.This mixture is formed when a sodium or potassium combined with a mixture of carboxylic acids (“fatty acids”).

3.Tin, copper and antimony when combined formed a soft mixture that can be molded when cold and beaten regularly without turning brittle. This maybe a substitute for silver plates, cups, candelabra and pitchers.

4.This metal alloy is a mixture of iron, manganese and chromium purified with a blast of hot air.

5.This pure substance is important in fresh keeping. It is important to sustain the chemical reactions to support an aquarium environment.

6.This is a group of pure substances that play a great role in the field of chemistry and other sciences.

7.This is commonly used elements, needed to sustain life

8.The most abundant element on earth, important in engineering and construction.

9.This is a mixture of lime, water, sand and other ground solids and rocks. This is used to pave the roads and build sidewalk.

10.A solution used in daily life, this has various uses ranging from washing your mouth for sanitary purposes.

ACTIVITY CARD 5

L

o

P W E

E L

E T

E E

Y E

R

C T

L T

BUILD ME

TEST YOUR WITTEST YOUR WITThe jumbled name of

materials in the white circles are pure

substances and the colorful circles are

mixtures. Write your answers in the space

asurg______

aainmcor_____

ourilq______

umulaimn______

lkim_____

alts_____

uceji_____

xgneoy_____

fmueepr______

rnoi_____

ASSESSMENT CARD 1

TEST YOUR TEST YOUR WITWITWrite PS if the statement

describes a pure substance and MX if the statement

describes a mixture.

1. It is a combination of at least two substances that can be separated from each other. ___

2. It does not have a fixed composition. ____

3. Its boiling point varies.___4. It has two or more distinct

phases.___5. It has changing properties

based depending on its composition. ____

6. It is made up of only one type of atom or molecule. ___

7. It has definite melting point.___

8. It has a definite boiling point.__

9. It has a fixed density.___10. It consists of only one

phase.___

ASSESSMENT CARD 2

CLASSIFY MECLASSIFY ME

Properties and examples of pure substances and mixtures are in the

cut-outs in the envelope. You are to classify by pasting on the table below.

ENRICHMENT CARD 1

Direction: Paste it on the characteristics/properties and examples of pure substances and mixtures on the table below.

 PURE SUBSTANCES

 MIXTURES

    

  

     

     

     

     

     

     

     

     

ENRICHMENT CARD 1

Enumerate the pure substances and mixtures found at home.

NAME MENAME ME

PURE SUBSTANCES

MIXTURES

ASSESSMENT CARD 3ENRICHMENT CARD 2

CONCLUSIONS ON THE CONCLUSIONS ON THE INVESTIGATIONINVESTIGATION

ClassificationElement is said to be the building block of matter. It cannot be broken down

into simpler substances simply because it is the simplest form of matter.

Compound is a combination of two or more elements which can be further decomposed through chemical means.

Classification

Both pure substances and mixtures play a vital role in the living system and in the environment. Water is an example of pure substance and is important in maintaining life. Cement is a mixture and it is necessary in the construction of shelter of humans, animals and even plants.

CORRECT MECORRECT ME

ACTIVITY CARD 1 ACTIVITY CARD 2

ACTIVITY CARD 3

ANSWER CARD 1

CORRECT MECORRECT ME

ACTIVITY CARD 4 ACTIVITY CARD 5

ASSESSMENT CARD 1 ASSESSMENT CARD 2

ANSWER CARD 2

CORRECT MECORRECT ME

ENRICHMENT CARD 1

ENRICHMENT CARD 2

ANSWER CARD 3

TAKE IT TAKE IT FROM MEFROM MEREFERENCE CARD 1

MORE FROM MORE FROM MEME

Mapa, Amelia P., et. al. Chemistry Textbook. Science and Technology for Third year. (2001)SD Publications, Inc.

Santos, Gil Nonato C. and Gisella B. Lebron. Chemistry for High School. (1999) Rex Bookstore Publishing House Inc.

Science and Technology Textbook for Third Year. (2004) Vibal Publishing House Inc.

Project EASE

Websites:

Definition of Pure Substances and Mixtures. jtt.dsb.ca

How to Distinguish Pure Substances and Mixture? www.dummies.com

List of Pure Substances.sciencehomeworkhelp.blog.com

What are examples of Pure substances? chemistry.about.com/od/matter

Pure Substances and Mixtures. www.slideshare.net

REFERENCE CARD 2