ATI TEAS 7
TEAS Test 7 science quizlet Questions
Question 1 of 5
In ecology, what defines a closed system?
Correct Answer: A
Rationale: In ecology, a closed system is one that does not exchange matter with its surroundings but can exchange energy. This means that while energy can enter or leave the system, the amount of matter within the system remains constant. Option A correctly defines a closed system in ecology.
Choices B and C are incorrect as a closed system does not exchange matter or energy. Option D is unrelated to the concept of a closed system in ecology.
Question 2 of 5
Where is the energy for most cellular processes produced?
Correct Answer: C
Rationale: The correct answer is C: Mitochondria. The energy for most cellular processes is produced in the mitochondria through the process of cellular respiration. Mitochondria are often referred to as the powerhouse of the cell because they generate ATP, the energy currency of the cell. This process involves the breakdown of glucose molecules to produce ATP, which fuels various cellular activities.
Choices A, B, and D are incorrect. The nucleus is responsible for storing genetic material and controlling cell activities, not energy production. The cytoplasm is where various cellular activities take place, but it is not the primary site for energy production. Ribosomes are involved in protein synthesis and do not generate energy for cellular processes.
Question 3 of 5
In a neutral atom, the number of electrons is:
Correct Answer: A
Rationale: In a neutral atom, the number of electrons must be equal to the number of protons to maintain electrical neutrality. Electrons carry a negative charge while protons carry a positive charge. By having an equal number of electrons and protons, the positive and negative charges balance each other out, resulting in an electrically neutral atom.
Choice B is incorrect because in a neutral atom, the number of electrons and protons must be equal.
Choice C is incorrect as it compares electrons to neutrons, which are not directly related in determining an atom's charge.
Choice D is incorrect as the number of electrons in a neutral atom is not dependent on the atom's temperature but rather on the atom's balance of positive and negative charges.
Question 4 of 5
What property of a wave determines the loudness of sound when heard by the human ear?
Correct Answer: B
Rationale: The amplitude of a wave determines the loudness of sound when heard by the human ear. The greater the amplitude of a sound wave, the louder the sound will be perceived. Frequency (
Choice
A) refers to the number of wave cycles in a given time period. Wavelength (
Choice
C) is the distance between two corresponding points on a wave. Velocity (
Choice
D) is the speed at which the wave travels and does not directly affect the loudness of sound perceived by the human ear.
Question 5 of 5
What is the term for a solution that has a lower concentration of solute compared to another solution?
Correct Answer: B
Rationale: An unsaturated solution is the term used for a solution that has a lower concentration of solute compared to another solution. In an unsaturated solution, more solute could still be dissolved. The other options are incorrect. A saturated solution (
A) contains the maximum amount of solute that can be dissolved and is in equilibrium with undissolved solute. A dilute solution (
C) has a low concentration of solute, but it does not imply a comparison to another solution. A concentrated solution (
D) has a high concentration of solute compared to the solvent, which is opposite to what is described in the question.