What is electricity? | STEM kids

What is the center of an atom called?

• Electron

• Nucleus

• Proton

• Circuit

Answer explanation

The center of an atom is called the nucleus. It contains protons and neutrons, while electrons orbit around it. The nucleus is essential for defining the atom's identity and properties.

Which particle in an atom carries a positive charge?

• Electron

• Neutron

• Proton

• Atom

Answer explanation

The proton is the particle in an atom that carries a positive charge. Electrons have a negative charge, and neutrons are neutral, meaning they have no charge. Therefore, the correct answer is proton.

What charge does a neutron have?

• Positive

• Negative

• Neutral

• Electric

Answer explanation

A neutron has no electric charge, making it neutral. This distinguishes it from protons, which are positively charged, and electrons, which are negatively charged.

What is electricity?

• The flow of protons

• The flow of neutrons

• The flow of electrons

• The movement of the nucleus

Answer explanation

Electricity is defined as the flow of electrons, which are negatively charged particles. This flow creates electric current, essential for powering devices and systems.

Which of the following is a good conductor of electricity?

• Wood

• Copper

• Rubber

• Plastic

Answer explanation

Copper is a metal known for its excellent conductivity, making it a good conductor of electricity. In contrast, wood, rubber, and plastic are insulators and do not conduct electricity well.

What does an electric circuit need to work properly?

• An incomplete pathway

• Only insulators

• A complete pathway

• Only a battery

Answer explanation

An electric circuit requires a complete pathway for current to flow. Without a complete pathway, the circuit cannot function, making 'A complete pathway' the correct choice.

The center of an atom is called the (a)   .

• Electron

• Proton

• Nucleus

• Circuit

Answer explanation

The center of an atom is called the nucleus, which contains protons and neutrons. Electrons orbit around the nucleus, but they are not part of the center. Therefore, the correct answer is nucleus.

(a)   carry a positive charge.

• Electrons

• Protons

• Neutrons

• Insulators

Answer explanation

Protons carry a positive charge, while electrons carry a negative charge and neutrons are neutral. Insulators do not carry charge but can prevent the flow of electricity. Therefore, the correct answer is protons.

What are materials called that allow electric current to flow easily?

• Insulators

• Conductors

• Circuits

• Protons

Answer explanation

Materials that allow electric current to flow easily are called conductors. They have free electrons that facilitate the movement of electricity, unlike insulators, which resist current flow.

Match the following particles with their charges.

• Negatively charged particles that move around the nucleus

• Protons

• Neutral particles in the nucleus

• Electrons

• Materials that allow the flow of electric charge

• Neutrons

• Positively charged particles in the nucleus

• Conductors

Tags

NGSS.MS-PS2-3