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Science final


Charge of protons Positive charge
Charge of neutrons Neutral
Charge of electrons Negative charge
Unit and equipment to measure mass Ms , g , kg // triple beam balance
Unit and equipment to measure volume Ml, l , cm3 // graduated cylinder
Unit and equipment to measure density Cm3, ml3 // triple beam balance & graduated cylinder
Elements in the same group have what in common? # of balance electrons & they react similar
Elements in the same period have what in common? # of energy shells
Law of conversation of mass Matter is never created or destroyed- only changed
5 evidence a chemical change has occurred 1. Gas produced 2. Temp change 3. Solid precipitation 4. Color change 5.light produced
What is an element? Single particle in the periodic table
What is a chemical change? Occurs when a reaction happens and A new substances is form
Example of a chemical change Burning a pencil , rusting steel wool , mixing lemon juice and baking soda
Unbalanced force When an object net force is more than 0
Balance force When the net force is 0 ( no movement )
What is a hypothesis? Educated guess
What is an observation? Using 5 senses
What is an inference? What you think about the observation
How to find density Speed x time
How to find speed Distance / time
How to find time Distance / speed
Created by: Sabrinagiunzioni