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Animals | Activity 1.2

Activity 1.2: Expressing Ideas about How Animals Grow (40 min)

Students complete the Expressing Ideas Tool for animals growing, helping them document, share, and examine their ideas. There are no “right” answers during this phase of the unit.

Materials You Provide

Resources Provided


Prepare your computer for showing the PPT as well as a time-lapse video of a child growing ( Have 1 copy for each student of 1.2 Expressing Ideas Tool for Animals Growing, and sticky notes. Print one copy of the Big Idea Probe: What Happens to the Fat? (optional), and 1.2 Animals Storyline Reading: Learning from the Work of Hans Krebs for each student.


1. Have students discuss the pretest

Ask students to write down questions they have after taking the pretest (for instance, on the back of their 1.2 Expressing Ideas Tool). Explain that we will try to answer most of those during the Animals unit.


Use the student responses to the class discussions and also their ideas on the 1.2 Expressing Ideas Tool for Animals Growing as well as the 1.2 Assessing the Expressing Ideas Tool for Animals Growing to assess their thinking at the beginning of the unit. By the end of the unit, students should be able to explain what happens when animals eat, grow, move, and breathe at macroscopic and atomic molecular scales. For now, listen to students’ ideas, with attention to how they describe matter and energy. Some students may not use principles of conservation of matter to identify food as the source of mass for animals (and instead only associate food as a source of chemical energy). Students may think that the food disappears as it is eaten, and may not recognize that atoms are transferred from the food to the organism for the purpose of growth.


If you are teaching this to multiple classes, you can save different versions of the PPT, with Slide 6 completed for each block. Alternatively, have all classes combine their answers and have students look for similarities and differences.