In this activity, you’ll watch a video of an experiment that relates to climate change. The experiment compares the effects of heat on carbon dioxide and air. Watch the video now. Then answer the series of questions below. Part A In the video, the experimenter used a model to represent a phenomenon observed in the natural world. What did the light and each of the flasks represent in this model?

Which substances have the lowest melting points: ionic covalent, or metallic

What are the similarities of physical and chemical change ?

Identify one disadvantage to each of the following models of electron configuration: -dot structures -arrow and line diagrams -written electron configurations type in your answer below. (answer) -dot structures do not show the distribution of electrons in orbitals and take up a lot of space. -arrow and line diagrams take up a lot of space and make it difficult to count electrons. -written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.