States of Matter
What are the 3 states of matter?
Solid, liquid, gas
What is a physical property?
A physical property can be observed by our senses
True or False: A physical change can be reversed
True
How do I change a solid to a liquid?
You apply heat to melt the solid
Gas because they move around the most
True or False: size, colour, weight, hardness are chemical properties
False, they are physical properties
True or False: A new substance is created when a physical change occurs
False, a new substance is created in a chemical change. A physical change only changes state
What is the process called when a gas turns into a liquid?
Condensation
True or False: Solids and Liquids have a definite volume
True
Give an example of a chemical property for a cake
soft, sweet, rainbow
Give one way that you know a chemical change has taken place
Change colour, has a odour, a gas is produced
What is the process called when a liquid changes into a solid? Give an example
The process is called freezing. An example is water into an ice cube
In what state are the particles tightly packed together? Explain why
Solids because they have less energy and space between particles.
Which one is not a physical property: size, shape, colour, flammability, smell
Flammability
Rusting is an example of what type of change (physical or chemical). Explain how you know
Chemical because it can not be reversed once it is rusted
What is deposition? Give an example
State change from gas to solid. An example is snowflakes and frost
What does definite volume mean?
It means that they have a fixed amount of space that they take up and it does not change
Name 3 types of chemical properties
Flammable, corrosive, reactivity, toxicity, chemical stablity
Give an example of a physical change
Ice to water
What is the state change from solid to a gas called? Give an example
Sublimation. An example is dry ice and moth balls