I NEED HELP ASAP Ok, so the video is showing you how to see the phase change (melting point and boiling points) of water. You are going to collect the data (temperature that these events occur) and create a lab based off of this. In your lesson you should have seen that different substances are made of different atoms/molecules and thermal energy affects those forces that hold them together differently. So you will have the data to record with just water, then you could research the same information for maybe salt water, or sugar water, and see how changing the substance affects the melting and boiling points, so with salt water if it is different you would want to explain why/what makes it have a different melting/boiling point. You can graph the melting and boiling points for both liquids and then compare those. You can create a materials list based on what you have watched in the video. go to you tube and look up phase change lab to see what its about