Chemical Change Flashcards
What type of change is burning wood?
Burning wood is an example of a chemical change. The wood cannot go back to its original form.
What type of change is melting chocolate?
Physical Change
What is the difference between chemical change and physical change
Chemical change can not be reversed while physical change can.
When liam becomes goth, is it physical or chemical change
Physical because liam can go back to being normal
How do you known that a chemical change is occurring??
A change in colour, bubbles or fizzing which means a gas is being created or change in temperature.
In a chemical reaction do the atoms -rearrange
- disappear - multiply
Rearrange
What is a endothermic reaction??
A process or reaction in which systems absorb energy from surroundings. eg) heat light
What is a exothermic reaction??
A chemical reaction that releases energy. eg) light and heat
The opposite to endothermic
What type of change is snapping a stick?
It is a chemical change because the stick cannot go back to one piece.
What type of change is melting ice?
It is a physical change because it can go back to being ice.
What type of change is cutting your hair?
It is a physical change because it can grow back.
What type of change is burning paper?
It is a chemical change because it can not go back to being paper.
What is Li?
Li is a element.
What is the state of mercury?
Liquid.
What is the state of hydrogen?
Gas.
What is the state of gold?
Solid.
What state is curium?
Synthetically prepared
What is a compound?
A compound is where two elements are joined roger e.g Au and Ag.
What change is freezing water?
It is a physical change because it can always go back to being just water.
What is a mixture?
A mixture can be lots of different items thrown together.
What is an energy change?
An energy change occurs when physical changes occurs e.g ice absorbs energy from the environment to become liquid water.
does the mass change if the ice cube melts
Yes because it still has the same amount of atoms.
What is a precipitate?
Precipitate is a solid that forms inside a solution.
Is rust a chemical or physical change?
Rust is a chemical change because it cannot go back.