During an investigation, Sam observes the number of hummingbirds that come to his large bird feeder at different times of day. H
e fills the feeder to the top the first day and counts the number of birds at 6 a.m., noon, and 6 p.m. over ten days. What are the independent and dependent variables in Sam’s investigation? The number of birds is the independent variable, and time is the dependent variable. Time is the independent variable, and the number of birds is the dependent variable. The type of bird food is the independent variable, and the number of birds is the dependent variable. The number of birds is the independent variable, and the type of bird food is the dependent variable.
The answer is <span>Time is the independent variable, and the number of birds is the dependent variable. </span>
<span>An independent variable is variable that is not affected in the experiment. It is what experimenter controls. On the other side, a dependent variable is called dependent because it depends on the independent variables. It is what is affected during the experiment. In Sam investigation, he controls time - he counts birds at 6 a.m. and 6 p.m. So, time is the independent variable. The number of birds is affected during the experiment, so it must be the dependent variable.
Sedimentary rock can change into metamorphic rock or into igneous rock. ... On Earth's surface, wind and water can break rock into pieces. They can also carry rock pieces to another place. Usually, the rock pieces, called sediments, drop from the wind or water to make a layer
As the stomach contents pass from the stomach to the small intestine, their acidity is rapidly neutralized by the addition of HCO3- produced by the pancreasa good thing, too, because the mucosa of the small intestine has no other protection against HCl.
Answer:An increase in light intensity causes both pupils to contract (see iris) even if only one retina is directly stimulated. This is known as a consensual reflex. Conversely, a decrease in light intensity causes dilation of the pupils
