Earths rotation
How long does Earth take to rotate once on its axis?
24 hours (1 day).
What is at the center of our solar system?
The Sun.
What planet is known as the “Red Planet”?
Mars.
What is the Moon?
A natural satellite that orbits Earth.
What symbol is used to represent a battery in a circuit diagram?
A long and short parallel line (positive and negative terminals).
What causes day and night on Earth?
Earth’s rotation on its axis.
What force keeps the planets in orbit around the Sun?
Gravity
Between which two planets is the asteroid belt found?
Between Mars and Jupiter.
How long does it take the Moon to complete one revolution around the Earth?
About 27.3 days.
What is the purpose of a switch in a circuit?
To open or close the circuit (control the flow of electricity).
How long does Earth take to complete one revolution around the Sun?
365¼ days (1 year).
What is the name of the path a planet takes around the Sun?
Orbit
Which planet is the largest in our solar system?
Jupiter
Why do we always see the same side of the Moon from Earth?
Because the Moon rotates and revolves at the same rate.
What type of circuit allows electricity to flow through only one path?
A series circuit.
What causes the seasons on Earth?
The tilt of Earth’s axis as it revolves around the Sun.
Name two objects found in our solar system besides planets.
Moons, asteroids, comets, meteoroids, etc.
What planet is closest to the Sun?
Mercury.
What causes the different phases of the Moon?
The changing positions of the Moon, Earth, and Sun.
What happens if one bulb blows in a series circuit with three bulbs?
All the bulbs go off because the circuit is broken.
If the Earth did not tilt on its axis, what would happen to the seasons?
There would be no seasons — temperatures would remain similar all year.
Explain why planets closer to the Sun move faster than those further away.
The Sun’s gravitational pull is stronger on closer planets, causing faster orbits.
Name all the planets in order from the Sun.
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune.
Explain the difference between the Moon’s rotation and its revolution.
Rotation: spinning on its axis; Revolution: orbiting Earth.
Explain the main difference between a series and a parallel circuit.
In a series circuit, components share one path; in a parallel circuit, each component has its own branch.