Chemical/Physical changes
Define a physical change
This type of change does not create a new substance.
What is photosynthesis
how green plants make food from light
What is the solvent?
dissolves the solute
Unit of Force
Newtons
Chemical change
A new substance is formed from a chemical change
What do the bubbles represent in the photosynthesis experiment?
oxygen
name given to something that dissolves in a solvent
solute
This force pulls objects toward Earth.
Gravity
What is a reactant?
When light increases what happens the rate of photosynthesis?
increases
What changes a liquid to a gas?
Heat - evaporation
What is air resistance?
Slows down objects moving through air
Endothermic reaction
Absorbs heat in the reaction
what is the best temperature for photosynthesis to happen?
20-30
This method separates an insoluble solid from a liquid.
Filtration
What is magnetic force?
repels or attracts a force
Law of Conservation of Mass
Matter cannot be created or destroyed in a chemical reaction
What is the name of the pores in leaves?
This process removes water from a solution to leave the solute behind.
Evaporation
What is slows a force down?
friction