Question

1. why would a comb that had been run through hair touch one cheerio and cause cheerios to come together. the comb had

a a positive charge
b a negative charge.
c the same charge as the cheerios already had
d a different charge than the cheerios already had

1. electrons that move away from their atoms cause

a static electricity.
b current electricity
c magnetic field.
d dynamic electricity

1. substances whose atoms have more free electrons are called

a conductors
b insulators
c electrolytes
d semiconductors

Explanation:

For question 4: When a comb is run through hair, it gains electrons (negative charge) due to friction. Opposite charges attract. If the comb causes cheerios to come together, it means the comb has a different charge than the cheerios (opposite charges attract).
For question 5: Static electricity is caused by the imbalance of electric charges (electrons moving away from atoms). Current electricity is the flow of electrons in a circuit. Magnetic field is related to magnetism. Dynamic electricity is not a standard term in basic electricity concepts like this.
For question 6: Conductors have more free electrons that can move easily. Insulators have very few free electrons. Electrolytes are substances that conduct electricity when dissolved in water (related to ions). Semiconductors have properties between conductors and insulators but not characterized by "more free electrons" in the simple sense like conductors.

Answer:

1. D. a different charge than the cheerios already had
2. A. static electricity
3. A. conductors