In a phase diagram, which of the following is the term used for a substance held at a temperature and pressure where the solid, liquid, and gaseous states of a substance exist simultaneously?

A. Triple point

B. Critical temperature

C. Absolute zero

D. Critical point

Answer Explanation:

A phase diagram is a graphical representation of the physical states of a substance under different conditions of temperature and pressure. A phase diagram usually has pressure on the y-axis and temperature on the x-axis. As we move along the curves of the phase diagram, we can see how the state of the substance changes from solid to liquid to gas, or vice versa.

Therefore, the Correct Answer is A.

Q #1: Which of the following summarizes a change that takes place as a solid turns to a liquid?

A. Particles become less ordered.

B. Intermolecular forces between particles become stronger.

C. Particles move closer together.

D. Particles have a decrease in mobility.

Answer Explanation

When a solid turns into a liquid during the process of melting, the particles within the solid gain enough energy to overcome the attractive forces holding them in a fixed arrangement. As a result, the particles become less ordered and more mobile, transitioning from a rigid structure to a more fluid state.
Q #2: Which of the following vessels carries oxygenated blood?

A. Pulmonary vein

B. Pulmonary artery

C. Superior vena cava

D. Inferior vena cava

Answer Explanation

The pulmonary vein is the only vessel in the list that carries oxygenated blood. The pulmonary artery carries deoxygenated blood from the heart to the lungs, where it gets oxygenated. The superior and inferior vena cava are large veins that carry deoxygenated blood from the upper and lower body, respectively, to the heart.
Q #3: Which of the following are the two major parts of the nervous system?

A. Autonomic nervous system and central nervous system

B. Peripheral nervous system and central nervous system

C. Peripheral nervous system and somatic nervous system

D. Autonomic nervous system and somatic nervous system

Answer Explanation

The nervous system is divided into two major parts: the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS consists of the brain and spinal cord, while the PNS consists of all the nerves outside of the CNS.

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In a phase diagram, which of the following is the term used for a substance held at a temperature and pressure where the solid, liquid, and gaseous states of a substance exist simultaneously?

More Questions on TEAS 7 Science

Q #1: Which of the following summarizes a change that takes place as a solid turns to a liquid?

Answer Explanation

Q #2: Which of the following vessels carries oxygenated blood?

Answer Explanation

Q #3: Which of the following are the two major parts of the nervous system?

Answer Explanation

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