How Temperature Increases Kinetic Energy:
- Temperature is a measure of the average kinetic energy of the particles in a substance. When the temperature of a substance increases, the particles within it gain more energy and move faster.
- The kinetic energy of a particle is directly related to its speed. As the temperature rises, the particles move faster and collide with each other more frequently and with greater force.
- This increased movement and collisions result in higher kinetic energy for the particles in the substance.

Effect of Temperature on Particle Weight:
- As the temperature of a substance increases, the particles gain more kinetic energy and move faster. This increased movement can lead to particles escaping from the substance.
- When a particle gains enough kinetic energy to overcome the forces holding it in place, it can break free from the substance and become a gas.
- This process is known as evaporation or sublimation, depending on whether the substance is a liquid or a solid. The particles that escape into the gas phase become lighter as they no longer contribute to the weight of the substance.

Conclusion:
- In conclusion, an increase in temperature leads to higher kinetic energy for the particles in a substance, causing them to move faster and collide more frequently. This increased movement can also result in particles escaping from the substance, making it lighter.