OBSERVING CHANGE💜 Flashcards
(9 cards)
Physical Change
There is no change in particles, just the particle arrangement and energy
Chemical change
Where a chemical reaction takes place and a new substance is formed.
During a chemical change energy may be released or absorbed.
This means chemical changes are very difficult to reverse.
An example of a physical change
Ice melts into water
An example of a chemical change
Buying a match
The chemicals that react together are called …… and the substances formed are called ……… .
Reactants
Products
During a chemical reaction the ……….. rearrange to form a new ……..
Atoms
Substance
Signs to indicate a chemical reaction has taken place
- Colour changes
- Temperature changes
- Light is emitted
- Bubbles of gas are produced
Law of conservation of mass word equation
Total mass of reactants = total mass of products
What do particle model diagrams show us?
How particles ( atoms ) rearrange to form a new substance during a chemical reaction.
