A simple machine is a basic mechanical device that makes work easier by changing the direction or magnitude of a force. The six classical simple machines are the lever, inclined plane, wheel and axle, pulley, wedge, and screw. These machines reduce the effort needed to complete a task by trading force for distance, using a principle called mechanical advantage.
Earth is the third planet from the sun and the only known planet to support life, thanks to its liquid water, atmosphere, and moderate temperature. It is the fifth-largest planet in the solar system and is about 4.5 billion years old. Its surface is 71% water-covered, and the planet is a slightly flattened sphere called an oblate spheroid.
Temperature is a physical quantity that expresses the degree of hotness or coldness of a substance [1]. It is a measure of the average kinetic energy of the atoms or molecules within a system [1, 2].
Hotness and Coldness: A higher temperature indicates that a substance is hotter, while a lower temperature indicates that it is colder [1].
The solar system is the Sun and all objects gravitationally bound to it, including eight planets, their moons, dwarf planets, and countless asteroids, comets, and icy bodies. Formed around 4.6 billion years ago, it includes the inner rocky planets (Mercury, Venus, Earth, Mars) and the outer gas and ice giants (Jupiter, Saturn, Uranus, Neptune). Everything in the solar system orbits the Sun, which contains 99.8% of the system's total mass.
The Sun: The star at the center of the solar system, a yellow dwarf star that provides light and heat to everything orbiting it.
The Eight Planets:
Inner, rocky planets: Mercury, Venus, Earth, and Mars.
Outer, gas and ice giants: Jupiter, Saturn, Uranus, and Neptune.
Simple machines are basic mechanical devices that make work easier by changing the direction or magnitude of a force, typically using leverage to gain mechanical advantage
1. Gravityย is the force that pulls objects toward each other.
2. It keeps us on the ground and makes planets orbit the Sun.
The Milky Wayย is the galaxy that contains our Sun, Earth, and billions of stars.It looks like a bright band in the night sky and is shaped like a giant spiral.
What is the use of temperature