CBSE Class 4 Science Solids Liquids And Gases Worksheet

Question 1. Give four examples of objects which have :
Answer:
Liquid particles: Water, Milk, Juice, Oil
Solid particles: Stone, Wood, Book, Pencil
Gaseous particles: Oxygen, Water vapour, Carbon dioxide, Nitrogen
In simple words: Matter exists in three states-solids, liquids, and gases, represented by these everyday examples.
Exam Tip: Remember that solids have a fixed shape, liquids take the shape of their container, and gases fill all available space.

Question 2. Give two properties of each:
Answer:
Solids:
1. Solids have a fixed shape and a fixed volume.
2. The particles in solids are tightly packed and cannot move around freely.
Liquids:
1. Liquids have a fixed volume but do not have a fixed shape (they take the shape of the container).
2. The particles in liquids are less tightly packed than in solids and can flow past each other.
In simple words: Solids are rigid and hold their shape, while liquids flow and take the shape of their containers.

Exam Tip: Focus on particle arrangement and shape/volume characteristics when comparing states of matter.

Q3. Fill in the blanks:

Question 1. Particles are closely packed in a ___________________(solid/liquids).
Answer: solid
In simple words: Solid particles are held tightly together.

Exam Tip: Solids have strong forces of attraction between particles.

Question 2. ___________(matter/solids) exists all around us.
Answer: Matter
In simple words: Everything in the universe is made up of matter.

Exam Tip: Matter is defined as anything that has mass and occupies space.

Question 3. The solid that dissolves in a liquid is called_____________(solute/solvent).
Answer: solute
In simple words: The substance being dissolved is the solute (like sugar or salt).

Exam Tip: Do not confuse solute with solvent; solute gets dissolved.

Question 4. The liquid in which a solid dissolves is called_______________(solvent/solution).
Answer: solvent
In simple words: The dissolving liquid is the solvent (like water).

Exam Tip: Water is known as a universal solvent because it dissolves many substances.

Question 5. The liquid obtained when a solute dissolves in a solvent is called________________(solvent/solution).
Answer: solution
In simple words: Solute plus solvent equals solution.

Exam Tip: A solution is a homogeneous mixture of solute and solvent.

Question 6. The three states of matter are___________________(interchangeable/non-interchangeable).
Answer: interchangeable
In simple words: States of matter can change from one form to another on heating or cooling.

Exam Tip: Ice melts to water and water evaporates to steam, showing interchangeability.

Question 7. The solid changes into liquid by the process called______________ (melting/evaporation).
Answer: melting
In simple words: Heating a solid turns it into a liquid.

Exam Tip: Melting is also known as fusion.

Question 8. Liquids changes into gas by process called ________________(evaporation/condensation).
Answer: evaporation
In simple words: Liquids turn into gas or vapor when heated or exposed to air.

Exam Tip: Evaporation can happen at any temperature from the surface of a liquid.

Question 9. Gases changes into liquid by process called _________________(condensation/evaporation).
Answer: condensation
In simple words: Cooling a gas turns it back into a liquid.

Exam Tip: Condensation is the reverse of evaporation.

Question 10. The process of changing water into ice is called _________________( freezing/ melting)
Answer: freezing
In simple words: Cooling liquid water turns it into solid ice.

Exam Tip: Freezing occurs at 0 degrees Celsius for pure water.

Question 4. Think and fill:
Answer:
Based on the standard water cycle / states of matter flow (Solid - Melts into - Liquid - On heating changes to - Gas):
1. First box (Solid state): Ice
2. Second box (Liquid state): Water
3. Third box (Gaseous state): Water vapour / Steam
In simple words: Ice melts into water, and water on heating changes into water vapour.

Exam Tip: Always trace the physical states in order from solid to liquid to gas when dealing with heating processes.

Q1 ) Fill in the blanks:

   1. _________________ is the smallest unit of a substances that has all the properties of that substances.

   2. A molecule can be further broken down into still smaller units called _________.

   3. All kinds of matter in the world is made up of about _______kinds of atoms.

   4. Molecules are constantly _________________ towards each other and always in a state of __________________

   5. Potassium permanganate is _____________(soluble/insoluble) in water.

   6. Two liquids that donot dissolve in each other is called ___________.

   7. _______________ or _______________ brings about changes in matter .

   8. There are many __________ changes which keep on occurring inside our body all the time.

   9. Water in the oceans , river and lakes contains dissolved ___________ and ________________.

Q2 ) Differentiate between solids, liquid, gas.

Q3 ) Write 3 characteristics feature of physical change.

Q4 ) Why bubbles are formed on the sides of vessel and at the bottom of

Q5) Say whether the following changes are physical or chemical

   1. Melting of ice

   2. Burning of coal

   3. Changing of milk to curd

   4. Mixing of sugar in water.

   5. Changing of wheat to chappati.