Why was mendeleev’s work so important? a. he scientists find the mass of each element. b. he showed repeating patterns in the properties of the elements. c. he scientists know where to find new elements.

Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural.question 2 reflects a moral or social value.question 3 refers to something that can be measured.question 4 reflects a question that can’t be observed.

How does concentration affect reaction rate

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?