1. I know that a ___________________________ is a prediction that is tested by experiment.

• hipótesis


• pregunta


• teoría


• conclusión

2. I know that a _________________ is when we use our senses to measure or collect data.


•inference


•observation



• theory



• hypothesis


3. I know that a ____________ is a statement made using previous knowledge or observations

•inference


•observation


•theory


•hypothesis

4. I know that the circulatory system and the respiratory system work to maintain homeostasis by helping carry _____________________________ to cells, while also removing carbon dioxide and waste

• oxygen and nutrients


• lactic acid and carbon dioxide


• oxygen and waste


• nutrients and carbon dioxide​