Alight year is approximately a) 9.5 trillion kilometers b) 95 trillion kilometers c) 150 million kilometers d) 150 billion kilometers

How can a give a full method for the experiment of separating sand from water by filtration? 1-materials 2-steps 3-conclusion also for water and salt separated by the evaporation or distillation process

Which of the following statements are incorrect?

One student said that the investigation was not valid (a fair test). write a plan for the investigation that includes improvements to the method and apparatus