SCIENCE 1
What is an atom?
Small particles that make everything around us.
Water H2O
Salt
Sugar
Melting: Derreter: Chocolate, ICE (derretido)
Freezing: Congelar: Water > ICE
Mixing: Salt + Water
Dissolving: Salt + Water
How can we dissolve sugar faster in water?
Put in HOT WATER.
How much % water does Earth have?
70% water (surface)
What is an Element?
A substance made from just ONE TYPE of atom.
What is a Mixture?
It’s 2 or more atoms mix together but it doesn’t react and can be easily separate.
2 examples of Chemical changes.
Candle Wax + Oxygen
Cement + water
How can we separate IRON AND SAND?
Using a magnet.
Liquid transform in vapor: What is the name of this process?
Evaporation
Give 3 examples of elements.
Copper Cu / Carbon C / Oxygen O / Gold Au / Iron Fe
Soil = Sand + Clay + Stones + Plants
Sea Water = Water + Salt
What type of change is PERMANENT? CHEMICAL OR PHYSICAL?
Chemical
Give a example you use filtration at home.
Making Coffee. (USING A FILTER)
Vapor transform in liquid: What is the name of this process?
Condensation
Where can you find all the symbols of the elements?
Periodic Table!
What is the difference between Compound and Mixture?
Compounds are formed by Chemical reactions and Mixtures aren’t. Mixtures are physically mixed.
When 2 substances mix together and they dissolve, They are called:
CLEAR SOLUTION
What's the process that separates SALT AND WATER?
Evaporation
What is an aquifer?
Layer of water underground.
What is a Compound?
Substance when different elements join together.
Do all the physical and Chemical changes are permanent?
2 substances that dissolve in water:
Why can't we separate water and salt by filtration?
Salt particules are too small to pass in a filter.
What happens if I mix sand and water?
They don't dissolve.