Questions and Answers| Graded A
2024/2025
What is the name of our galaxy?
The Milky Way.
How does the Earth's axial tilt affect the seasons?
The Earth's axial tilt causes different parts of the Earth to receive varying amounts of
sunlight throughout the year, leading to the changing seasons.
What is the primary force that keeps planets in orbit around the Sun?
Gravity.
What phase is the moon in when it is completely illuminated as seen from Earth?
Full moon.
How long does it take the Earth to complete one full orbit around the Sun?
One year (365.25 days).
What is the hottest planet in our solar system?
Venus.
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,What celestial event occurs when the Moon passes directly between the Sun and Earth?
A solar eclipse.
What is a light-year a measure of?
The distance that light travels in one year.
Which planet in the solar system has the most extensive ring system?
Saturn.
What is the largest planet in our solar system?
Jupiter.
What is the atomic number of an element?
The number of protons in the nucleus of an atom.
What is the chemical formula for water?
H₂O.
What is the pH of a neutral substance, such as pure water?
7.
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, What type of bond is formed when two atoms share electrons?
Covalent bond.
What is the name of the process by which a solid changes directly into a gas?
Sublimation.
What is the most abundant gas in Earth's atmosphere?
Nitrogen.
What is the primary difference between an element and a compound?
An element is a pure substance made of only one type of atom, while a compound is made up
of two or more elements chemically bonded together.
How does a catalyst affect a chemical reaction?
A catalyst speeds up a chemical reaction without being consumed in the process.
What is the chemical symbol for gold?
Au.
What happens to the molecules of a substance when it is heated?
The molecules move faster and spread apart.
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