What is the Partical theory of matter
That all matter is made up with tiny particles that have empty spaces between them
Different substances are made up of different kinds of particles
Particles in constant random motion
Particles move faster as temperature increases
Particles attract each each other
What are Physical changes
A change that is reversible, substance itself is untouched, no new substance is formed, for example, water to ice
What are Physical Properties
Physical properties like the four senses so like stuff you see things you smell, texture, lustre clarity taste
What are Chemical Changes
Chemical changes is a change that is not revisable, a new substance is formed, for example,burning paper
What are Chemical Properties
Chemical properties of combustibility, which is the ability of a substance to burn and reactivity, which is how easily the substance acts with another substance like oxygen ,acid , and a sensitivity to light how substances react to exposure to light
classifing Matter (PS/M)
Pure substances and mixture
What dose GRASP stand for
G- given
R- required
A- analysis
S- solution
P- paraphrase (therefore, statement)
What are the two types of mixture?
Homogeneous mixture (solution): looks the same throughout (e.g., salt water, air).
Heterogeneous mixture: you can see the different parts (e.g., salad, sand + water).
What is a mixture?
Made of two or more pure substances combined physically.
Composition can vary.
Can be separated by physical means.
What is pure substance?
• Made of only one kind of particle.
• Has a fixed composition (doesn’t vary).
• Cannot be separated by physical means.
Examples:
• Elements (e.g., oxygen, gold, iron)
• Compounds (e.g., water, salt, carbon dioxide)
Homogeneous mixture (solution):
looks the same throughout (e.g., salt water, air).
Heterogeneous mixture:
you can see the different parts (e.g., salad, sand + water).
Is Rusting of iron physical change or chemical
Chemical change
Is Boiling water physical change or chemical
Physical
Is melting ice physical change or chemical
Physical
Is Souring milk physical change or chemical
Chemical
Is Digesting food physical change or chemical
Chemical
Is Dissolving sugar in water physical change or chemical
Physical
