Q & A

What are the steps in scientific methods/research process?

• observation

• representation

• interpretation

What is the difference between hyporthesis, law and theory?

• hypothesis predicts an event

• law describes it

• theory explains it

Difference between mass and weight?

• mass is a measure of the amount of matter in an object

• weight is the force that gravity exerts on an object

What is the process of measuring mass called?

weighing

What are the 3 temperature scales?

• kelvin

• Farenheit

• celcius

What is the difference between mixture and compound?

compound can only be seperated by chemical means into their pure components.

What are the 3 common states of matter?

• solid

• liquid

• gas

Describe a plasma.

• plasma behaves like gas and can expand indefinitely but consists of high-energy particles

• strongly influences by electrical and magnetic fields even though they have an overall charge of zero

What affects the interconversion between the 3 states of matter?

temperature

What is the difference between physical and chemical properties?

• pp can be observed without changing its identity

• cc can be demonstrated only by chemical changes

What’s the difference between intensive and extensive property?

• IP do not depend on the amount of matter present

• EP are affected directly by the amount of matter present

Give an example of extensive properties?

• volume

Give an example of intensive property?

• density