You have viewed multiple unknown astronomical objects in this lab activity. In all tests, what was your test variable (independent variable)? The amount of an element in each object
The type of elements in each spectrum
The astronomical object viewed by the spectrometer

If steel is more dense that lake water, why can a boat float

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air

Which of the following is not a means to accelerating? question 4 options: a)increase speed b)remain still c)decrease speed d)change direction