Matter Flashcards
What is matter?
Anything which has mass, occupies space and can be perceived by our senses.
What were the five elements that Indian philosophers believed made up all kinds of matter?
Sky, air, fire, water and earth
Who suggested that matter is made up of tiny particles called Anu?
Maharishi kannada
Who named parmanu as atom?
A Greek thinker democritus
What did John Dalton suggest?
He suggested that all kinds of matter are made up of extremely small particles called atoms.
What is atom?
An atom is the smallest particle of matter that exhibits all the properties of that matter. They do not have independent existence.
What is molecule?
Atoms combine with each other to form small particles called molecules. They have independent existence.
How many particles of water does a drop of water contain?
10²¹ particles of water
What are the states of matter?
Solids, liquids, and gases
What characteristics does a solid have in terms of shape and volume?
It has a definite shape and a definite volume
What characteristics does a liquid have in terms of shape and volume?
It has a definite volume but no definite shape
What characteristics does a liquid have in terms of shape and volume?
It has a definite volume but no definite shape
What characteristics does a gas have in terms of shape and volume?
It has neither a definite volume not a definite shape
What is the kinetic theory of matter?
This theory explains the existence of three states of matter, their characteristic properties and the interconversion of matter from one state into another.
Who first showed the constant motion of particles of matter?
Robert brown
Robert brown suspended some pollen grains in water and looked into the water…… irregular manner. Why were the pollen grains moving in an irregular manner?
This is because water is made up of tiny particles which are also in random motion. The pollen grains move on such a way because they collide with the moving particles of water.
What is brownian motion?
The zig zag random Motion of suspended particles on the surface of a liquid or in air is called brownian motion.
What is diffusion?
The intermixing of two or more substances due to the motion of their particles in order to get a uniform mixture is called diffusion.
What is intermolecular space?
The space between the particles of matter is called intermolecular force of attraction.
A piece of chalk can be broken easily but a piece of coal can’t be broken easily. Why?
Because a piece of chalk has weaker intermolecular force of attraction than the piece of coal.
What is intermolecular space?
What is intermolecular force of attraction?
The force of attraction between the particles of matter is called intermolecular force of attraction.
What is kinetic energy?
The energy possessed by a body due to its motion is called kinetic energy.
Define:- interconversion of states of matter
The phenomenon of change of one state of matter into another and then back to the original state, without any change in it’s chemical composition is called interconversion of states of matter.
