Page 97 - ICSE Science 3 : E-book

TERMS TO KNOW

1. Volume: The amount of space that a liquid fi lls in a container

2. Solution: A solution is formed when two or more substances of the same kind mix
or dissolve completely.
3. Solute: The substance which dissolves

4. Solvent: The substance into which a solute dissolves
5. Stirring: Mixing thoroughly a substance with a liquid using a spoon

6. Soluble substances: Substances that dissolve completely in water
7. Insoluble substances: Substances that do not dissolve in water at all

QUICK LOOK

1. Water is the most abundant and precious substance on the earth.
2. Water is a liquid and it possesses some properties.
3. Water can change its form and exist in all the three forms by heating or cooling.
4. Most of the substances dissolve in water to form a solution.

5. Solute substances are usually present in lesser quantity while solvent forms the
largest component of a solution.
6. There are certain conditions that aff ect making of a solution.
7. Based on the ability of a substance to dissolve in water, it can be categorised as
soluble or insoluble.
8. Some objects have higher density while some have lower density than water. This
makes the objects either sink or fl oat.

EXERCISES

A. Fill in the blanks.

1. Substances that completely dissolve in water are __________ substances.

2. A solute dissolves faster when it is ____________.

3. Instead of fi xed shape, water has a fi xed ____________.

4. Water changes its form easily due to ____________ and ____________.

5. ____________ forms the largest component of a solution.

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