Earth Sun Moon System

What is an Ellipse?

• A circular shape that describes the path of a planet's orbit around the sun.

• An oval shape that describes the path of a planet's orbit around the sun in the heliocentric model.

• A straight line that represents the distance between two points in space.

• A polygon with three sides and three angles.

What is the meaning of the term Penumbra?

• The completely dark inner region of a shadow during an eclipse.

• The partially shaded outer region of a shadow cast during an eclipse, where the light source is only partially blocked.

• The bright area surrounding a shadow during an eclipse.

• The total darkness experienced during a solar eclipse.

What is a planet?

• A celestial body that orbits a star, is large enough to be rounded by its own gravity, and has cleared its orbital path.

• A small rocky body that orbits a planet.

• A massive star that emits light and heat through nuclear fusion.

• A large collection of gas and dust in space.

Inertia

• The tendency of an object to resist any change in its state of motion, whether at rest or moving.

• The force that causes an object to accelerate in the direction of the net force applied.

• The measure of an object's mass and its resistance to gravitational pull.

• The speed at which an object moves in a straight line.

What is the Law of Universal Gravitation?

• The principle that every object in the universe attracts every other object with a measurable force.

• The theory that objects in motion tend to stay in motion unless acted upon by an external force.

• The concept that energy cannot be created or destroyed, only transformed.

• The law stating that for every action, there is an equal and opposite reaction.

What is a Satellite?

• A celestial or artificial body that orbits a larger body in space, such as a planet or star.

• A type of spacecraft used for interstellar travel.

• A natural phenomenon that occurs in the atmosphere.

• A device used for communication on Earth.

What is a Solar Eclipse?

• An eclipse that occurs when the moon passes directly between Earth and the sun, casting a shadow on Earth.

• An event where the Earth passes between the sun and the moon, causing a lunar shadow.

• A phenomenon where the sun is obscured by clouds, leading to a temporary darkness.

• A type of eclipse that happens only during the summer solstice.

What is a Lunar Eclipse?

• An eclipse that occurs when Earth passes directly between the sun and the moon, casting a shadow on the moon.

• An eclipse that occurs when the moon passes directly between the sun and the Earth, blocking sunlight.

• An eclipse that occurs when the Earth is in the shadow of the moon, causing darkness on Earth.

• An eclipse that occurs when the sun passes directly between the Earth and the moon, illuminating the moon.

Mass Noun

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[mas]

• The measure of the amount of matter contained within a physical object, which remains constant regardless of location.

• The weight of an object, which can change based on gravity.

• The volume of an object, which is the space it occupies.

• The density of an object, which is its mass per unit volume.

What is gravity?

• The universal force of attraction that acts between all objects with mass, pulling them toward each other.

• A force that pushes objects away from each other.

• The force that keeps planets in orbit around the sun.

• A type of energy that can be harnessed for power.