What is a control group?

What is a dependent variable?

What is an independent variable?

What is the main function of the Digestive System?

What is the main function of the Respiratory System?

What is the main function of the Circulatory System?

What is the main function of the Excretory System?

In the lung model lab what happened when we replaced the wider straw with a straw that has a smaller opening?

What organs are used in waste removal?

THe hypothesis to a lab was that plants grow faster in green light. Students observed the plants and recorded their observations. They oberveed that there was no change in the plants. What is the dependent variable in the experiment?

Scientists perform experiments to test hypotheses. How do scientists try to remain objective during experiments?

Running is an activity that causes the cells in the muscular system to use oxygen at a faster rate. Which systems work together to deliver more oxygen to these cells?

The organs of the digestive system help organisms take in food and break it down for cels to use for energy, eliminate unused materials. Which if the following are three organs that effectively carry out the function of digestion in an organism?

Which pathway does most oxygen take after breathing in?

Why do scientists use multiple trials in an experiment?

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