Drag each tile to the correct box. Arrange the tiles to show the sequence of the steps in a scientific investigation.

make an observation
ask questions
construct a hypothesis
test the hypothesis
analyze the results
and make conclusions
communicate the results

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communicate the results

analyze the results

ask questions

construct a hypothesis

test the hypothesis

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.