The Meteoroids in the Leonids Meteor Shower, Which Occurs Every

question 18

Multiple Choice

The meteoroids in the Leonids meteor shower, which occurs every November, come from:

• A) dust in the star-forming Leo nebula
• B) dust melted off Comet Tempel-Tuttle
• C) debris from the collision of Comet Shoemaker-Levy 9
• D) zodiacal dust
• E) dust blown off of Earth's surface

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Definitions:

Atom

The basic unit of a chemical element, consisting of a nucleus of protons and neutrons, surrounded by electrons.

Molecule

The smallest particle in a chemical element or compound that has the chemical properties of that element or compound.

Sigma Bond

A type of covalent bond formed by the head-on overlap of atomic orbitals, involving two electrons shared between two atoms.

Atomic Orbital

A mathematical function describing the wave-like behavior of an electron in an atom. These functions define regions in an atom where electrons are most likely to be found.