Rotation refers to the circular movement of an object around its axis. In this case, the Earth rotates on its axis and causes day and night. Earth’s rotation takes approximately 24 hours to complete. Revolution refers to the Earth’s movement around the Sun, which takes about 365.25 days to complete. Motion and vibration are not specific to the earth’s movement on its axis and do not accurately describe this phenomenon.

Plants do not have lungs like animals, but they also perform respiration. Through tiny openings called stomata, plants take in carbon dioxide and release oxygen. This process is essential for their survival, as it provides them with the energy they need to grow and carry out other metabolic activities.

Transparent objects allow light to pass through them easily, making them see-through. This means that we can clearly see objects on the other side of transparent materials.

A galaxy is a collection of hundreds of millions of stars, along with gas, dust, and other smaller celestial bodies, held together by gravity. Galaxies come in various shapes and sizes and are the building blocks of the universe. They can contain billions or even trillions of stars, along with other celestial objects like planets, asteroids, and comets. The term “galaxy” is commonly used to refer to the Milky Way, the galaxy in which our solar system resides, but there are countless other galaxies in the universe, such as Andromeda.

The SI unit of speed is meters per second (m/s). This unit represents the distance traveled in meters divided by the time elapsed in seconds. Meters per second (m/s) is commonly used in scientific and engineering calculations to measure the rate at which an object or person is moving. The m/s unit allows for precise and consistent measurements, making it the standard unit for speed in the International System of Units (SI).

The SI unit of speed is meters per second (m/s). This unit represents the distance traveled in meters divided by the time elapsed in seconds. Meters per second (m/s) is commonly used in scientific and engineering calculations to measure the rate at which an object or person is moving. The m/s unit allows for precise and consistent measurements, making it the standard unit for speed in the International System of Units (SI).