Three things that effect a life system would be
- sunlight
-water
-energy/food
Hope this helps
Ventilation is very important because it helps remove the gas form people’s homes and schools and it redirects the random gas outside so it is less likely to hurt people
It is a solid when is frozen and a liquid when it melts
The direction of a vector multiplied by a scalar is only affected if the scalar is negative, in which case the vector will now be in the opposite direction. If the scalar is positive, the vector will only change in magnitude