Examine each image and match it to the following. Justify your choices.
- pure water vapour coming off of the pot you were boiling for noodles
- a solution of ammonia in Windex
- methane frozen in Arctic Ice
- the distilled water we used yesterday to dissolve the salt and glucose.
You will notice the presence or absence of arrows. You will also notice squiggly arrows and straight arrows. What’s up with that? Why are there two different kinds?