MCQs

Explanation
When the half of the Earth is facing the Sun, it experiences Day , as the Sun's light illuminates that region. The other half of the Earth , facing away from the Sun, experiences Night.

Explanation
During Summer in the Northern Hemisphere , the days become longer and the nights become shorter due to the Earth's axis being tilted towards the Sun . This results in more direct sunlight and longer periods of daylight.

Explanation
In Winter , days become shorter and nights become longer, due to the Earth's axis being tilted away from the Sun. Resulting in less direct sunlight reaching the Northern Hemisphere .

Explanation
The revolution of the Earth around the Sun causes the changing seasons, including Summer and Winter. As the Earth's axis is tilted and different parts of the planet receive varying amounts of sunlight throughout the year.

Explanation
The Earth's axis is an imaginary line that runs through the North Pole and the South Pole , around which the Earth rotates. It is an imaginary reference point , not a physical object or shape.

Explanation
The Earth completes a day in a Solar day , which is approximately 24 hours. This is the time it takes the Earth to rotate once on its axis, causing day and night to cycle.

Explanation
The Earth rotates on its axis , completing one full rotation in 24 hours . This is the equivalent of 1,440 minutes or 86,400 seconds . This rotation is what gives us day and night, as different parts of the planet face towards or away from the Sun.

Explanation
The rotation of the Earth on its axis causes day and night. As different parts of the planet face towards or away from the Sun.

Explanation
The orbit of the Earth around the Sun is an ellipse , meaning that it is an elongated circle , with the Sun located at one of the two foci (plural of focus) of the ellipse. This means that the distance between the Earth and the Sun varies throughout the year. With the closest point (perihelion) occurring around early January. With the farthest point (aphelion) occurring around early July .

Explanation
An iron nail/steel rod can be magnetized by passing an electric current around it , a process known as electromagnetic induction. This is the principle behind electromagnets.

Explanation
When the half of the Earth is facing the Sun, it experiences Day , as the Sun's light illuminates that region. The other half of the Earth , facing away from the Sun, experiences Night.

Explanation
During Summer in the Northern Hemisphere , the days become longer and the nights become shorter due to the Earth's axis being tilted towards the Sun . This results in more direct sunlight and longer periods of daylight.

Explanation
In Winter , days become shorter and nights become longer, due to the Earth's axis being tilted away from the Sun. Resulting in less direct sunlight reaching the Northern Hemisphere .

Explanation
The revolution of the Earth around the Sun causes the changing seasons, including Summer and Winter. As the Earth's axis is tilted and different parts of the planet receive varying amounts of sunlight throughout the year.

Explanation
The Earth's axis is an imaginary line that runs through the North Pole and the South Pole , around which the Earth rotates. It is an imaginary reference point , not a physical object or shape.

Explanation
The Earth completes a day in a Solar day , which is approximately 24 hours. This is the time it takes the Earth to rotate once on its axis, causing day and night to cycle.

Explanation
The Earth rotates on its axis , completing one full rotation in 24 hours . This is the equivalent of 1,440 minutes or 86,400 seconds . This rotation is what gives us day and night, as different parts of the planet face towards or away from the Sun.

Explanation
The rotation of the Earth on its axis causes day and night. As different parts of the planet face towards or away from the Sun.

Explanation
The orbit of the Earth around the Sun is an ellipse , meaning that it is an elongated circle , with the Sun located at one of the two foci (plural of focus) of the ellipse. This means that the distance between the Earth and the Sun varies throughout the year. With the closest point (perihelion) occurring around early January. With the farthest point (aphelion) occurring around early July .

Explanation
An iron nail/steel rod can be magnetized by passing an electric current around it , a process known as electromagnetic induction. This is the principle behind electromagnets.

Explanation
A thermal conductor is a material that allows heat energy to flow through it easily. Such as metals like copper, aluminum, and iron.

Explanation
Conductors are materials that allow electricity to flow through them, such as copper, aluminum, and gold. They have a high concentration of free electrons, which are able to move freely within the material , carrying electrical charge with them. Materials that do not allow electricity to pass through them are called insulators .

Explanation
When a magnet is suspended freely , its north pole will point towards the Earth's magnetic South pole (which is located near the Earth's geographic North pole), and its south pole will point towards the Earth's magnetic North pole (which is located near the Earth's geographic South pole). This is because opposite poles attract, and the Earth's magnetic field is strong enough to align the magnet's poles.

Explanation
Iron is a ferromagnetic material, which means it is strongly attracted to magnets . Therefore, an iron kettle will be attracted to a magnet .

Explanation
Wood is an insulator and cannot conduct electricity. So it cannot be used to complete a circuit.

Explanation
An open circuit provides an incomplete path for the current to flow through. As the circuit is broken or disconnected , preventing electricity from flowing.

Explanation
A closed circuit provides a complete path for the current to flow through. It allowing electricity to flow from the power source , through the wire, and back to the power source.

Explanation
An open circuit is an electrical circuit that is broken or disconnected, and electricity cannot flow. When the wire is disconnected, the circuit is open, and the bulb is off.

Explanation
A close circuit, also known as a closed circuit. It is an electrical circuit that is complete and allows electricity to flow from the power source, through the wire, and to the bulb , causing it to light up.

Explanation
Insulators are materials that resist the flow of electricity, such as rubber, glass, wood, and plastic. They have a high resistance to electric current and are used to prevent the flow of electricity.

Explanation
A thermal conductor is a material that allows heat energy to flow through it easily. Such as metals like copper, aluminum, and iron.

Explanation
Conductors are materials that allow electricity to flow through them, such as copper, aluminum, and gold. They have a high concentration of free electrons, which are able to move freely within the material , carrying electrical charge with them. Materials that do not allow electricity to pass through them are called insulators .

Explanation
When a magnet is suspended freely , its north pole will point towards the Earth's magnetic South pole (which is located near the Earth's geographic North pole), and its south pole will point towards the Earth's magnetic North pole (which is located near the Earth's geographic South pole). This is because opposite poles attract, and the Earth's magnetic field is strong enough to align the magnet's poles.

Explanation
Iron is a ferromagnetic material, which means it is strongly attracted to magnets . Therefore, an iron kettle will be attracted to a magnet .

Explanation
Wood is an insulator and cannot conduct electricity. So it cannot be used to complete a circuit.

Explanation
An open circuit provides an incomplete path for the current to flow through. As the circuit is broken or disconnected , preventing electricity from flowing.

Explanation
A closed circuit provides a complete path for the current to flow through. It allowing electricity to flow from the power source , through the wire, and back to the power source.