I use warm ups every day to start my science classes. Check out my free Weekly Warm Up to see the format. I use this warm-up to introduce systems, energy, topography, elevation, landforms, and the branches of Earth science. It introduces, reinforces, and reviews what we are learning in class each day. On Fridays, a picture is shown on the Smart Board. Students make observations, inferences, and predictions about the picture. Included in this warm-up is a warm-up for interactive notebooks, a Picture of the Week (a geologist at work), and an answer key.