2. PRETEST
Direction: Choose the letter of the best
answer. Write the letter of your answer on a
separate sheet of paper.
1. If salt has been dissolved in water, how
could I separate it from the water again?
A. by decanting
B. by dissolving
C. by evaporating
D. by handpicking
3. 2. To separate salt from the
water, we could _________ .
A. melting it
B. using a magnet
C. taking the water off
D. evaporating the water so the
salt is left behind
4. 3. Which of the following statements
best describes evaporation? The
process by which __________.
A. liquid changes directly into a gas
B. substance is made by a chemical
reaction
C. particles leave a liquid and become a
gas
D. particles leave a gas and become a
liquid
5. 4. Which of the following examples
below is NOT evaporation?
A. boiling water
B. alcohol bottle left open
C. cold water in the basin
D. drying clothes under the sun
6. 5.How do table salts created? Table
salt is created by _______.
A. decanting the sea water
B. filtering the sea water repeatedly
C. collecting the water vapor from sea
water
D. the evaporation of sea water through
industrial or natural processes,
resulting in salt crystals
9. Do you wash your clothes by yourself?
After washing the clothes, what do you do
to dry them?
What do you think makes the clothes dry?
10.
11.
12. Direction: Read the conditions stated in the
box. Pick out those that undergo
evaporation process. Write your answer in
your notebook.
burning paper coloring a book
cooking noodles cooling after sweating
writing boiling mongo seeds
drying of sand after the rain watching tv
drying of wet floor salt making
drying of plate after washing cooking rice
13. Evaporation is a process that
uses heat to separate a
dissolved solid from a liquid.
The solution is heated so that
the solvent evaporates leaving
the solid behind.
15. Presentation of the lesson:
Evaporation is the
process of which
water changes from a
liquid to gas or vapor.
16. Activity 1: Think of It!
Direction: Write TRUE if the statement is correct and
FALSE if it is wrong. Write your answer on a separate
sheet of paper.
_______ 1. Evaporation is when a liquid becomes a gas.
_______ 2. When water evaporates, it becomes solid.
_______ 3. Evaporation means changing from a liquid
to a gas.
_______ 4. Evaporation is when water gets warm and
changes from water to water vapor.
_______ 5. Evaporation is gas to liquid.
17. Activity 2: Find Me!
Direction: Check (✓) the activities that involves
evaporation and mark X if it is not. Write your
answer on a separate sheet of paper.
19. Assessment
Direction: Choose the letter of the correct answer.
Write your answer in your journal.
1. Lester had noticed that the amount of water
in a container with a plant becomes less as the
days goes by. What do you think is the reason
of decreasing amount of water in a container?
a. Some insects sipped the water.
b. Water in the container was not changed.
c. Water evaporated because of heat.
d. The plant has a stem.
20. 2. Which of these examples show
evaporation process as technique of
separating mixtures?
a. drying of water on the table
b. flooding of water in the river
c. cooling of water in the refrigerator
d. freezing of water in the ocean
21. 3. What technique will Jocelyn
use if she wants separate salt
mixed with water in a container?
a. filtering c. picking
b. evaporation d. sedimentation
22. 4. In evaporation process,
liquid becomes_______________
when heated.
a. solid c. plasma
b. ice cubes d. vapor
23. 5. It is a process of separating
mixtures which involves heating
leaving the solid residue in a
container.
a. evaporation c. distillation
b. precipitation d. sedimentation
24. Direction: Put a ü before the number if
the technique used is Evaporation and X
if not.
_______ 6. water cycle
_______ 7. using cell phone
_______ 8. pulling a chair
_______ 9. drying of hair using hair dryer
_______ 10. boiling camote
25. 1. Review of previous lesson.
2. Motivation:
At the end of everyday, we wipe off
the blackboard with wet sponge to
make it clean and ready to use for the
next day. After a few minutes, the
water disappeared. Where do you
think the water goes? Why?
26.
27. Material:
water
Hand sanitizer ( alcohol )
Ball pen
paper
Procedures:
1. Draw a table
1.Put some sanitizer ( 1 teaspoon ) on your palm and rub it for 3
minutes then observe after.
2.Put some water (1 teaspoon ) on your palm and rub it for 3 minutes
then observe after.
3.Reacord your data on your paper.
Observation sanitizer Water
28.
29.
30. Exploration
a. Ask the pupils to prepare the materials for the
experiment.
b. Group the class into three.
c. Distribute the activity cards to each group and
let them perform the said activity.
d. Remind the class of the do’s and don’ts in
conducting the experiment.
31. Activity 1
I. Problem: How to make salt crystals?
II. Materials:
Pan, water, table salt,
stove or any cooking device,
clean jar
33. 2. Put a salt in it and stir in as much salt as you can.
3. Take the pan off the heat. Pour in about ¼ - ½ cup (60-120ml)Of
your salt and stir until the water is clear. If you don’t see any salt
grains in the water, stir in another spoonful. Keep stirring more salt
until you see salt grains that won’t dissolve when you stir.
35. 5. Get a pencil or a stick. Make sure that they should be long enough to
lie across the top of a jar. Tie a string around a pencil/stick. Cut the
string to the correct size to dangle in the water.
36. 6. Move the jar to safe place. Keep the jar under
the heat of the sun and/or keep a fan blowing near
it on the lowest setting. Wait for crystals to form.
37. IV. QUESTIONS
1. What are the two substances make the mixture indicated
in the experiment?
2. How are salt crystals formed?
3. What process of separating mixture is being described in
the experiment?
4. Is the process useful to us?
5. What are other mixtures that can be separated through
evaporation?
38. EXPLANATION:
1. Ask the pupils to report their findings in their
experiment.
2. Let them answer the questions stated above.
Have them chose their leader to report their
answers.
39. “How would you describe
the process of separating
mixture through evaporation
using the activity on making
salt”?
40. Evaporation occurs everyday, both in natural and
manmade environments. Evaporation occurs
most often in the oceans around the world .One by
product of evaporation can be used to seas from
the season your food. Salt is extracted from the seawater
by allowing the water to evaporate over
long periods of time. The salt that gives salt water its
saline taste is left behind. Salt ponds evaporate
slowly at normal temperatures. The salt left over from
the evaporated ponds is then used to make
table salt.
41. Evaporation is the process by which water
and other liquids changes from a liquid state
to a vapour or gas state. Evaporation is great
for separating a mixture (solution) of a soluble
solid and a solvent. The process involves
heating the solution until the solvent
evaporates (turns into gas) leaving behind the
solid residue.
42. Direction: From the short information that you have read, answer
the following questions on the blank provided. Answer them in your
notebook.
1. What is evaporation?
2. What is needed to achieve evaporation process?
3. Give 3 examples of situation where evaporation
process was observed.
4. What kind of material was left behind when mixture
was heated?
5. What kind of change is involve in evaporation
process?
43. Write E if the following conditions undergo the
evaporation technique of separating mixtures
and N if not.
1. water in the canal becomes less after the rain
2. doormat on the floor - ___________
3. wet hair becomes dry - ___________
4. chair on the ground - ___________
5. cooling after sweating - __________
44. To get the salt back from the salt water,
the solution is heated to boiling point. As
it boils, the water escapes as vapour
(gas). After sometime, all the water
evaporates, leaving a layer of salt at the
bottom of the beaker.
46. E. Evaluation:
I. Choose the letter of the correct answer.
1. Which is the best way to get salt from a salty water?
a. evaporation b. filtration c. distillation d.magnetism
2. Where does the liquid go during evaporation process?
a. below the ground b. up c inside the salt d. none
II. Explain briefly the importance of evaporation as the process
of separating mixtures. (3pts.)
47. Direction: Answer the following questions.
1. What do you call the process by which water changes
from a liquid to gas or vapor?___________
2. Making salt is an example of separating mixture
through _________.
3-4. What are the two solutions in the mixture of making
salt? _________&_________
5. How would you describe the process of separating
mixture through evaporation? _________
48. V. Assignment
What is the implication of the
process of separating mixtures
through evaporation in our
everyday life?
