Lab 21: Inside a Pump

Warm Up: What type of pump is better for pumping water? What does this tell you about the structure of your heart?

Vocabulary :
1.function – an objects job or role

2.model – a smaller or larger version of an object that is too small or too big to observe in a classroom

3.structure – what an object is made of and how the object is shaped

Hypothesis: Which pump do you think will work more like the heart (siphon pump or pressure pump)?Why? (skip 3 lines)

Analysis Questions:
1. If you cut lengthwise through each pump, what do you think is inside each pump? Draw a cross-section of both the siphon pump and the pressure pump. Complete the cross-section by drawing and labeling what you think is inside each pump. (skip half a page)

2. On your drawings of the pump cross-sections, add arrows showing which way water flows inside the pump.

3. What made one pump work better than the other? (skip 4 lines)

4. Your heart pumps blood around your body. Would you expect it to work more like the siphon pump or the pressure pump? Explain. (skip 4 lines)