CBSE Class 5 Science States Of Matter Worksheet Set 02

I. Name the following:

Question 1. Anything that occupies space and has mass.
Answer: Matter
In simple words: Anything around us that has weight and takes up space is called matter.

Exam Tip: Remember the two essential properties of matter: mass and volume (occupying space).

Question 2. Conversion of liquid into gaseous state.
Answer: Evaporation (or Vaporization)
In simple words: The process in which a liquid changes into a gas or vapor is called evaporation.

Exam Tip: Do not confuse evaporation with boiling; evaporation can happen at any temperature from the surface of a liquid.

Question 3. A liquid in which a solid dissolves.
Answer: Solvent
In simple words: A solvent is the liquid that breaks down and dissolves a solid substance.

Exam Tip: Water is the most common universal solvent studied in elementary science.

Question 4. The space between molecules.
Answer: Intermolecular space
In simple words: The empty gaps present between tiny particles of matter are called intermolecular spaces.

Exam Tip: Solids have the least intermolecular space, while gases have the maximum intermolecular space.

Question 5. A homogenous mixture of a solute in a solvent.
Answer: Solution

In simple words: When a solid completely dissolves in a liquid, the resulting clear mixture is a solution.

Exam Tip: Homogenous means the composition is uniform throughout the entire mixture.

Question 6. The mixture of salt and water is called.
Answer: Salt solution
In simple words: Salt dissolved in water forms a saltwater solution.

Exam Tip: Here, salt is the solute and water is the solvent.

Question 7. A hard substance which has definite shape and definite volume.
Answer: Solid
In simple words: Solids are rigid materials that do not easily change their shape or size.

Exam Tip: Solids maintain a fixed volume and fixed shape because their molecules are tightly packed.

Question 8. A solid which dissolves in a liquid.
Answer: Solute
In simple words: The substance that gets dissolved inside a liquid is known as a solute.

Exam Tip: Common examples of solutes are sugar and salt.

Question 9. Matter made up of different kinds of atoms combined in fixed numbers.
Answer: Compound
In simple words: A compound is formed when two or more different elements chemically combine in a fixed ratio.

Question 10. The three states of matter.
Answer: Solid, Liquid, and Gas
In simple words: Matter typically exists in three primary forms: solids, liquids, and gases.

Exam Tip: Learn all three states along with their molecular arrangement characteristics.

II. Fill in the blanks:

Question 1. Molecules are made up of __________.
Answer: Atoms
In simple words: Atoms join together to form molecules.

Exam Tip: Atoms are considered the basic building blocks of matter.

Question 2. The molecules of gas are __________ packed.
Answer: Loosely (or very loosely / farthest apart)
In simple words: Gas molecules have large spaces between them, so they are loosely packed.

Exam Tip: Because of loose packing, gases can flow freely and occupy all available space.

Question 3. Physical change is a __________ change.
Answer: Temporary (or reversible)
In simple words: A physical change does not form a new substance and can usually be reversed.

Exam Tip: Melting of ice into water is a standard example of a physical change.

Question 4. __________ is a unique mixture that exists on the earth.
Answer: Air
In simple words: Air is a natural mixture of various gases surrounding the Earth.

Exam Tip: Air contains nitrogen, oxygen, argon, carbon dioxide, and water vapor.

Question 5. A __________ has neither a definite shape nor a definite volume.
Answer: Gas
In simple words: Gases spread out completely to fill any container they are placed in.

Exam Tip: Contrast this with solids (definite shape and volume) and liquids (definite volume, indefinite shape).

Question 6. When the change is only in state of matter, it is called __________ change.
Answer: Physical
In simple words: Changing from solid to liquid or liquid to gas is only a physical change.

Exam Tip: No new chemical bonds are created or destroyed during a change of state.

Question 7. A __________ has a definite shape and definite volume.
Answer: Solid
In simple words: Solids maintain their own shape and size without needing a container.

Exam Tip: A stone or a book are examples of objects with definite shape and volume.

Question 8. Chemical change is a __________ change.
Answer: Permanent (or irreversible)
In simple words: A chemical change forms entirely new substances and cannot be easily reversed.

Exam Tip: Burning of paper or cooking food are common examples of chemical changes.

Question 9. Each molecule of oxygen contains __________ atoms of oxygen.
Answer: Two (<(O_2)>)
In simple words: Naturally occurring oxygen gas exists as diatomic molecules, meaning two oxygen atoms bound together.

Exam Tip: Always remember the chemical formula for oxygen gas is \(O_2\).

Question 10. A __________ has a definite volume but does not have a definite shape.
Answer: Liquid
In simple words: Liquids take the shape of the container they are poured into, but their total volume remains constant.

Exam Tip: Water, milk, and juice are examples of liquids.