FSQ 9 Review - Electric Charges

When Cindy brushes her hair with a plastic comb, some strands of her hair stand up and repel each other. Which of the following statements best explains why this happens?

• Brushing with the comb causes the hair strands to create an electrical circuit.

• Brushing with the comb causes the hair strands to have the same charges.

• Brushing with the comb causes the hair strands to have different charges.

• Brushing with the comb causes the hair strands to become magnetized.

Sophia is listening to her favorite song through her headphones. What type of energy transformation occurs in this process?

• Sound energy is transformed into light energy.

• Electrical energy is transformed into sound energy.

• Mechanical energy is transformed into electrical energy.

• Heat energy is transformed into mechanical energy.

In which of the following pair of trials will the balloons repel one another?

• Trial 1 and Trial 3

• Trial 1 and Trial 4

• Trial 2 and Trial 3

• Trial 2 and Trial 4

Sam is making tea. He fills a kettle with water and places it on the electric stove. For the tea to brew, the energy from the stove must cause the water to boil. What type of energy transformation occurs for the water to boil?

• from electrical to kinetic energy

• from electrical to light energy

• from electrical to thermal energy

• from electrical to chemical energy

Anika rubs a glass rod with a piece of silk, giving the rod a positive charge and the silk a negative charge. Based on this information, which of the following statements is true?

• Neither the silk nor the rod will attract the neutral pieces of paper.

• Both the silk and the rod will attract the neutral pieces of paper.

• Only the rod will attract the neutral pieces of paper.

• Only the silk will attract the neutral pieces of paper.

A neutral object becomes negatively charged when it loses electrons.

• true
• false

Tags

NGSS.MS-PS2-3

Grace rubbed a balloon on her wool sweater, causing separated charges on the balloon. If a small piece of paper is brought near the balloon, which of these statements correctly describes the interaction?

• The negative charges in the paper will repel negative charges on the balloon.

• The paper will move so that positive charges are close to negative charges on the balloon.

• The paper will remain stationary as charges do not interact.

• The positive charges in the paper will move away from positive charges on the balloon.

During a physics experiment, students Alex and Jamie built a simple circuit using a battery, a switch, and a buzzer. When they closed the switch, the buzzer made a sound. What type of energy transformation occurred in this circuit?

• Chemical energy was changed into sound energy.

• Electrical energy was changed into sound energy.

• Sound energy was changed into electrical energy.

• Light energy was changed into sound energy.

When an object gains electrons (e^-) it becomes __________

• Neutral

• Positively charged

• Negatively charged

Tags

NGSS.MS-PS2-3

Chloe asks her mother to help her make tea. Chloe's mother puts a tea kettle full of water on the kitchen stove and turns on the stove. After a few minutes, the tea kettle starts to whistle. What energy transformations have taken place?

• sound to heat to light

• electric to sound to light

• electric to heat to sound

• electric to chemical to sound