Answer:
It's important for a scientist to try to hold all variables constant except for the independent variable. If a control variable changes during an experiment, it may invalidate the correlation between the dependent and independent variable. When possible, control variables should be identified, measured, and recorded.
The gas state. When water boils, it releases a gas we know as steam.
Answer:
saturated fat makes the blood stream better.
Explanation:
Answer:
b. ventricles
The right and left ventricles
