click below
click below
Normal Size Small Size show me how
Science final
Science
Question | Answer |
---|---|
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 |