Test: The Earth and Its Movements - Class 4 MCQ

The spinning motion of the Earth is referred to as rotation. This movement occurs from west to east and is responsible for the cycle of day and night.

The term "midnight sun" refers to the phenomenon where the Sun is visible at midnight during the summer months in polar regions. This occurs because of the tilt of the Earth's axis.

When the Northern Hemisphere is tilted towards the Sun, it experiences summer due to increased direct sunlight. This tilt leads to warmer temperatures and longer days in this hemisphere.

The Earth's movement around its own axis is called rotation. This spinning motion takes about 24 hours to complete one full rotation, resulting in the cycle of day and night.

The Earth's orbit around the Sun is elliptical, meaning it is oval-shaped. This shape affects the distance between the Earth and the Sun throughout the year, influencing seasonal changes.

The equator is the imaginary line that divides the Earth into the Northern and Southern Hemispheres. It plays a crucial role in understanding climate zones and the distribution of sunlight.

The changing seasons on Earth are primarily caused by the tilt of the Earth's axis and its revolution around the Sun. This combination affects how sunlight is distributed across the planet, leading to variations in temperature and weather.

During an equinox, both the Northern and Southern Hemispheres receive equal sunlight, resulting in nearly equal lengths of day and night. There are two equinoxes each year: the spring equinox and the autumnal equinox.

During summer in the Northern Hemisphere, the Southern Hemisphere receives the least direct sunlight, as it is tilted away from the Sun. This results in cooler temperatures and winter conditions in that hemisphere.

When the Northern Hemisphere is tilted towards the Sun, it receives direct sunlight, resulting in summer. In contrast, the Southern Hemisphere, tilted away from the Sun, experiences winter during this time.

The Earth takes 365 days and 6 hours to complete one full revolution around the Sun. This extra 6 hours every year accumulates to create a leap year every four years, adding an additional day to the calendar.

A leap year has 366 days instead of the usual 365 days. This extra day compensates for the additional 6 hours it takes the Earth to complete its orbit around the Sun each year.

Equinoxes are significant because they mark the points in the year when day and night are of equal length, occurring twice a year. These events signify the transition between seasons.

Polar night occurs in areas near the poles when the tilt of the Earth's axis prevents sunlight from reaching them for an extended period during winter months. This results in prolonged darkness.

The Earth's tilt affects temperature by causing varying sunlight intensity across different regions. Areas tilted towards the Sun receive more direct sunlight, leading to warmer temperatures, while areas tilted away receive less direct sunlight, resulting in cooler temperatures.

"Simultaneously" refers to the fact that the Earth rotates on its axis while it revolves around the Sun at the same time. These movements occur together, impacting day/night cycles and seasons.

The Southern Hemisphere experiences its longest day on 22 December, which is the summer solstice for that hemisphere. During this time, the South Pole is tilted towards the Sun, resulting in extended daylight hours.

The longest day in the Northern Hemisphere occurs on the summer solstice, which is around June 21. This is when the North Pole is tilted closest to the Sun, resulting in the most extended period of daylight.

The Earth's revolution around the Sun affects climate by changing the angle and intensity of sunlight that different regions receive throughout the year. This leads to seasonal weather changes and variations in temperature.

The tilt of the Earth's axis causes variation in daylight hours and the angle of sunlight that different parts of the Earth receive, leading to the changing seasons. Areas tilted towards the Sun experience summer, while those tilted away experience winter.