(b) What are the different types of materials?
Short Answer Questions:
1. (a) What are the three physical states of materials? (b) Give any two dit
2. (a) What are materials?
3. Classify the following into lustrous and non-lustrous materials: gold chain, plastic bottle, cotton
shirt and aluminium rod.
. Classify the following into hard and soft materials: diamond, wax, brick and tomato.
We put some sugar in a glass of water and stir. After some time, it disappears.
(a) Why did sugar disappear in water?
(b) What do we learn from this property of sugar which gets mixed in water?
Value Corner
ong Answer Questions:
Answers
Answer:
sugar disappear while mixing with water because sugar is soluble you might have been observed when sugar is mixed with water it easily dissolves here sugar is solute and water is solvent
Answer:
1.)The three states of matter are: solid, liquid, and gas.
2.)A material is a substance or mixture of substances that constitutes an object. Materials can be pure or impure, living or non-living matter. ... New materials can be produced from raw materials by synthesis. In industry, materials are inputs to manufacturing processes to produce products or more complex materials.
3.) gold chain-lustrous
plastic bottle- non lustrous
cotton- non lustrous
shirt- non lustrous
Aluminum rod- lustrous
4.) diamond- hard material
wax- soft material
brick- hard material
tomato- soft material
a)The heat from the water caused the crystals to break up into pieces so small that they "disappear." We can't see the sugar anymore because the water molecules have binded to the sugar molecules.
b)When sugar is mixed in water, It forms a homogeneous mixture. This is an example of dissolution. When sugar is mixed with water, All the ions of sugar dissociate and water molecule forms a layer around the ions,This whole process is called dissolution.