To make your hypothesis an informed one, you need to have

a.
done some research

b.
completed all your experiments

c.
designed an experimental procedure

d.
made unusual observations that need to be explained

Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies. molten iron has a density of 7.0g/cm cubed. in its solid state, iron has a density of 8.0g/cm cubed.

What do elements in a family tend to share. a.) similar periods b.) similar groups c.) similar atomic symbols d.) similar chemical properties and characteristics

How many times did thomas edison mess up the light bulb