Systems
The mass of a system is always the .....
What is the same?
The reactants and products of chemical reactions are called.......
What are substances?
Something made of more than one substance.
What is a mixture?
What is soluble?
What are quantitative observations?
The mass of a soda under pressure seems to do this once it is opened.
What is decrease?
The molecules/atoms made during a chemical reaction.
What are the products?
A chemical reaction that breaks one molecules into two different substances.
What is electrolysis?
This property is easy to see.
What is color?
These things can be seen but don't always prove a chemical reaction is happening?
What are indicators?
The mass of the road salt and baking soda should have stayed the same because it was....
What is a closed system?
The molecules/atoms at the beginning of a chemical reaction.
What are reactants?
What is a phase change?
This property is measured by adding heat to a substance.
What is melting point?
These observations describe the properties or characteristics during an experiment.
What are qualitative observations?
The molecules can escape in an ............ ..........
What is an open system?
Molecules rearrange and recombine to make a new substances in a .............. ...............
What is a chemical reaction?
When something can dissolve in another.
What is soluble or solubility?
This property is measured by scratching solids like diamonds.
What is hardness?
This process doesn't make new substance.
What is a phase change?
In this system the molecules can't leave this system.
What is a closed system?
Molecules are never destroyed or disappear.
What is conservation of mass?
Things that change if a chemical reaction happened.
What are properties?
This property is measured by mass/volume.
What is density?
When this happens to a substance, it is always a chemical reaction.
What is burning or combustion?