On the classwork 3 activity the website listed in question number 1 no longer works the new on is https://nj.pbslearningmedia.org/resource/lsps07-sci-phys-thermalenergy/thermal-energy-transfer/
the website in number 3 of the same activity doesn't seem to work.
Hi Kimberly, thank you for reaching out and for providing the new link for question number 1. I've also found an activity that works for question number 3. The changes have been made to the file and reposted here.