The hypothesis in a seed germination experiment is: light is necessary for lettuce seed germination. groups of lettuce seeds are placed in light with warm temperatures and adequate moisture. another set of identical seeds is placed in the dark under the same conditions. in this experiment, what is the independent variable?

Independent Variables are: The amount of warm temperatures and adequate moisture that plant received.

Explanation:

Independent and dependent variables are commonly used variables.

The variable that we can change is called the Independent variable.

 The dependent variable depends upon the independent variable, as we change the value of the independent variable the value of the dependent variable is also get changed.

Here we are interest to know that "Does a lettuce seeds are grown best in dark or light?"

Here the amount of warm temperatures and adequate moisture that plant received can be changed, so it is independent variable.

The plant's growth is dependent variable.

answer; i believe the above is (false)

the earth’s crust is broken into separate pieces called tectonic plates (fig. 7.14). recall that the crust is the solid, rocky, outer shell of the planet. it is composed of two distinctly different types of material: the less-dense continental crust and the more-dense oceanic crust. both types of crust rest atop solid, upper mantle material. the upper mantle, in turn, floats on a denser layer of lower mantle that is much like thick molten tar.

each tectonic plate is free-floating and can move independently. earthquakes and volcanoes are the direct result of the movement of tectonic plates at fault lines. the term fault is used to describe the boundary between tectonic plates. most of the earthquakes and volcanoes around the pacific ocean basin—a pattern known as the “ring of fire”—are due to the movement of tectonic plates in this region. other observable results of short-term plate movement include the gradual widening of the great rift lakes in eastern africa and the rising of the himalayan mountain range. the motion of plates can be described in four general patterns:

collision: when two continental plates are shoved together

subduction: when one plate plunges beneath another (fig. 7.15)

spreading: when two plates are pushed apart (fig. 7.15)

transform faulting: when two plates slide past each other (fig. 7.15)