This is the presentation I used to introduce matter and basic physics concepts to third grade students. Also included is a copy of the notes that I wrote to go along with the presentation. I used this presentation for a two week unit, science being twice a week with 1 hour periods. The worksheet I used after the first day is free on my page. I have also uploaded the unit test that I used to assess the students' knowledge on this subject. Be sure to leave lots of time for questions, discussion, and crazy examples!