Electric Charge Analysis

1. What are the 3 particles that make up an atom and what charges do they have?

• Proton: +

  Neutron: 0

  Electron: -

• Proton: 0

  Neutron: +

  Electron: -

• Proton: -

  Neutron: +

  Electron: 0

Tags

NGSS.MS-PS1-1

2. If an atom has more protons than electrons, it is ______________ charged. (- or +)

• +

• -

3. If an atom has more electrons than protons, it is _______________ charged.  (- or +)

• +

• -

4. Objects that have opposite electrical charges will ________________ (attract/repel) each other.

• attract

• repel

Tags

NGSS.MS-PS2-3

5. Objects having the same electrical charges will __________________ (attract/repel) each other.

• attract

• repel

Tags

NGSS.MS-PS2-3

Match the following

• involves rubbing electrons off one object to another

• Static Electricity

• material through which electrons move easily

• Insulator

• material through which electrons cannot move

• Friction

• a build up of electrons on an object

• Conductor

7. When you rub one object against another, only the __________________ (protons/ electrons/neutrons) are free to move from one object to another.

• electrons

• protons

• neutrons

Tags

NGSS.MS-PS1-1

8. When you rub a balloon against your head, the balloon absorbs electrons from your hair. Is your hair now positively charged or negatively charged? Why?

• Hair is now positively charged. Electrons contain negative charge, so when negative charges are absorbed INTO THE BALLOON, this means negative charge LEFT the HAIR. Hair is more +

• Hair is now positively charged. Electrons are positively charged, so when they are absorbed, your hair is more +

• Hair is now negatively charged because electrons contain positive charge, and adding positive charge makes it negative

Tags

NGSS.MS-PS2-3