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 glands synthesizes antidiuretic hormone?

A. Pancreas

B. Pineal gland

C. Hypothalamus

D. Thymus

Answer Explanation

Antidiuretic hormone (ADH) is a peptide hormone that regulates the water balance in the body by increasing the reabsorption of water by the kidneys. ADH is synthesized by the hypothalamus, a part of the brain that controls many functions, such as appetite, sleep, and body temperature. ADH is then stored and released by the posterior pituitary gland, which is located at the base of the brain.
Q #2: 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 #3: Which of the following can lead to a tsunami?

A. Lightning strikes

B. Flooding

C. Earthquakes

D. Sunspot activity

Answer Explanation

A tsunami is a series of large waves that are caused by the displacement of a large volume of water in the ocean or a large lake. The most common cause of tsunamis is earthquakes, which can generate seismic waves that travel through the water and create sudden changes in water level.

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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 glands synthesizes antidiuretic hormone?

Answer Explanation

Q #2: Which of the following summarizes a change that takes place as a solid turns to a liquid?

Answer Explanation

Q #3: Which of the following can lead to a tsunami?

Answer Explanation

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