Grade 5 | Science Notes - States of Matter | Unit-8

Grade/Class 5 Science Notes of States of Matter, Unit 8. Under category 'Science and Environment Education' of Class 5 Science subject Unit:8 - "States of Matter", Students and teachers can find the notes and solutions of fill in the blanks, true and false statements, match the followings, definitions, question and answers, make meaningful words, glossary, extra word meanings in Nepali language and extra conceptual question answers.

EXERCISE:

1. Fill in the blanks using the words given in the box.

solid	vapour	three	freezing
space	water	camphor	mass

a. Water exists in all three states.

b. Liquid wax on cooling changes into solid.

c. The changing of liquid into solid is called freezing.

d. Water on heating changes into vapour.

e. Water converts directly into its vapour on heating.

f. Water vapour on cooling converts into camphor.

g. Matter has mass and covers space.

2. Write ‘T’ for true and ‘F’ for false statements.

a. States of matter cannot be changed on cooling or heating. F

b. On heating, camphor is changed into liquid state. F

c. Liquid state of matters can be changed into solid by heating. F

d. Liquids do not have a fix shape. T

e. The vapour of iodine on cooling changes into solid. T

f. Water is naturally found in all three states. T

g. We always need a refrigerator to convert liquids into solids. T

3. Match the following.

A	B
Ice	Gas
Melting	Sublimation
Freezing	Liquid into gas
Water	Liquid into solid
Camphor	Solid
Water vapour	Fusion
Evaporation	Liquid

Answer:

A	B
Ice	Solid
Melting	Fusion
Freezing	Liquid into solid
Water	Liquid
Camphor	Sublimation
Water vapour	Liquid into gas
Evaporation	Gas

4. Select the best alternative.

a. Melting is also called fusion. (melting/evaporation/condensation)

b. Water converts into ice on freezing. (heating/melting/freezing)

c. Iodine vapour converts into solid on cooling. (Iodine vapour/water vapour/oxygen gas)

d. Evaporation is the process of converting water into water vapour on heating. (heating/cooling/melting)

e. Wax in a normal environment is in solid state. (solid/liquid/gas)

f. Water freezes into ice. (water/camphor/wax)

5. Define the following terms.

a. Matter – The thing that has mass and covers some space is called matter.

#What do you mean by matter?

b. Change of state of matter – The process of changing one state of matter into another state of matter is called the change of state of matter.

#What do you mean by change of state of matter?

c. Solidification – The process of changing a liquid substance into its solid form is called solidification.

#What do you mean by solidification?

d. Melting – The process of changing the solid form of a substance into its liquid form by heating is called melting.

#What do you mean by Melting?

e. Sublimation – The process of changing a solid substance directly to its gas on heating and gas into its solid on cooling is called sublimation.

#What do you mean by sublimation?

f. Evaporation – The process of changing a liquid substance into its gaseous form by heating is called evaporation.

#What do you mean by evaporation?

g. Condensation – The process of changing of a gaseous substance into its liquid form by cooling is called condensation.

#What do you mean by condensation?

6. Answer the following questions.

a. What are the three states of matter?

Answer: The three states of matter are solid, liquid and gas.

b. How can you change solid ice into liquid state?

Answer: We can change solid ice into liquid state by heating.

c. Give four examples of the change of the states of matter.

Answer: The four examples of the change of the states of matter are as follows-

i. Ice (solid) changes in water (liquid) on heating.

ii. Water (liquid) changes in vapour/steam (gas) on heating.

iii. Vapour/steam (gas) changes into water (liquid) on cooling.

iv. Water (liquid) changes into ice (solid) on cooling.

d. What makes the matter?

Answer: Molecules make the matter.

e. Why is ammonium chloride called a sublime?

Answer: Ammonium chloride is called a sublime because it directly changes into gas in heating and solid on cooling.

f. Write a difference between melting and evaporation.

Answer: A difference between melting and evaporation is as follow-

Melting – The process of changing the solid form of a substance into its liquid form by heating is called melting.

Evaporation – The process of changing of liquid substance into its gaseous form by heating is called evaporation.

g. How is evaporation different from condensation?

Answer:  Evaporation is different from condensation by following way-

Evaporation is a process of changing liquid substance into gaseous form by heating and Condensation is the process of changing gaseous substance into liquid on cooling.

h. Describe the condensation with a suitable program.

Answer:

i. Describe the sublimation process with a suitable diagram.

Answer:

j. How can a state of matter be changed into another state?

Answer: A state of matter can be changed into another state by heating and cooling.

7. Arrange the given alphabets to make meaningful words.

a. NOITNESADNOC	b. TAMTRE	c. NOISUF
d. LIMEBUS	e. ZEERGINE

Answer:

a. CONDENSATION	b. MATTER	c. FUSION
d. SUBLIME	e. ENERGIZE

GLOSSARY:

Vapour - gas. (#vapour meaning in Nepali language is बाफ.)

Pour – make something flow. (#pour meaning in Nepali language is खन्याउनु.)

Substances - materials. (#substances meaning in Nepali language is पदार्थहरु.)

Melting - becoming liquefied by heat.. (#melting meaning in Nepali language is पग्लनु.)

Freezing – extremely cold, turning to ice. (#freezing meaning in Nepali language is चिसो.)

Evaporation - the process of turning from liquid into vapour.. (#evaporation meaning in Nepali language is वाष्पीकरण.)

Condensation - the conversion of a vapour or gas to a liquid. (#condensation meaning in Nepali language is संक्षेपण.)

Sublimation – chemical process where a solid turns into a gas without going through a liquid stage. (#sublimation meaning in Nepali language is उच्च बनाउन क्रिया)

Matter – substance having mass and space. (#matter meaning in Nepali language is पदार्थ.)

Molecule - smallest particle of a substance composed of one or more atoms. (#molecule meaning in Nepali language is अणु.)

Solid – firm and stable in shape; not liquid or fluid. (#solid meaning in Nepali language is ठोस.)

Liquid – a substance that flows freely but is of constant volume and occupy space. (#liquid meaning in Nepali language is तरल)

Gas – a substance in a form like air that is neither solid nor liquid. (#gas meaning in Nepali language is ग्यास.)

State – the particular condition that someone or something is in at a specific time. (#state meaning in Nepali language is अवस्था)

Candle - a cylinder or block of wax with a central wick which is lit to produce light as it burns. (#candle meaning in Nepali language is मैनबत्ती.)

Wax - a solid, slightly shiny substance made of fat or oil which is used to make candles. (#wax meaning in Nepali language is मोम, मैन.)

Kettle – a container or device in which water is boiled, having a lid, spout, and handle. (#kettle meaning in Nepali language is कितली.)

Boil – cause to reach the temperature at which it bubbles and turns to vapour. (#boil meaning in Nepali language is उसिन्न, उमाल्नु.)

Droplets – a very small drop of a liquid. (#droplets meaning in Nepali language is सानो थोपा.)

Gently – with a mild, kind, or tender manner. (#gently meaning in Nepali language is राम्रो ढंगले, बिस्तारै, सरसर.)

Funnel – a tube or pipe that is wide at the top and narrow at the bottom. (#funnel meaning in Nepali language is सोली.)

Conceptual Questions:

a. Is air a matter? Why?

Answer: Yes, an air is a matter because it has mass and covers some space.

b. What will be the state of matter if its molecules are compressed tightly?

Answer: The states of matter will be changed if its molecules are compressed tightly.

c. Why do iodized salts have a plastic packaging?

Answer: Iodized salts have a plastic packaging because iodine in salt will be changed into vapour while exposed in hot air and changed into solid when placed in cool place.

#From above grade class-5 science notes of "States of Matter" Unit-8, we hope students can define matter and the change of states of matter. They can explain the various process of changing of matters from one form to another. Also they can explain melting, freezing, sublimation, evaporation and condensation.

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