Define critical point.
Group of answer choices:
A. The temperature and pressure above which a supercritical fluid exists.
B. The temperature and pressure are equal.
C. The temperature and pressure below which a supercritical fluid exists.
D. The temperature and pressure are not equal.
E. The temperature and pressure where liquid, solid, and gas are equally stable and are in equilibrium.

A. The temperature and pressure above which a supercritical fluid exist.

Explanation:

The physical states of a substance under different temperature and pressure conditions is represented by a phase diagram. In this diagram, normally the pressure is represented on the y-axis while the temperature is present on the x-axis. There is a point on this diagram called the critical point, beyond this point the liquid and the gaseous phase become indistinguishable. When the substance surpasses the critical point, it is referred as a supercritical fluid.

From the above description, all the options other than A is false.

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.

that tool would be a compass