PARTICLE AND CHANGES Flashcards
(18 cards)
What three main things do you need to make a fire?
Oxygen, Fuel, Heat
What happens when you take something out of a fire triangle?
The fire would go out
What change of state occurs when a substance is heated to its boiling point?
Liquid to Gas
What gas must be present for burning to happen? Give the full name, not the symbols.
Oxygen
What is the scientific term used for the chemical reaction when a fuel burns? (Hint: your answer should be one word.)
Combustion
What three states of matter does not flow or spill?
Solid
True or false? When sulfuric acid and calcium oxide are mixed in a beaker, the temperature of the solution increases. This is evidence that a chemical reaction has taken place.
True
What is the name given to the change in state from solid to liquid?
Melts or Melting
What will happen to the oxygen levels in the sealed glass jar?
Decrease
Below is a word equation for the combustion of methane. Name a reactant in this reaction.
methane + oxygen → carbon dioxide + water
Methane or Oxygen.
Which state of matter can be easily compressed?
Gas, There is place between them so they can be easily compressed
Which state is being described here? The particles are moving quickly and are far apart from each other. They sometimes collide but apart from this they do not touch. There is almost no force holding them together.
Gas or Gases
Which state is being described here? The particles can move and slide past each other. They are very close together but they are not in a fixed pattern. There are forces between the particles but they are weak.
Liquid
What is condesation?
When steam/gas is cooled down back to a liquid
What is the name given to the change in state from liquid to solid?
Freezes or Freezing
What is freezing?
When a liquid goes to a solid
What is melting?
When a solid goes to a liquid
What is evaporation?
When a liquid turns to a gas
