ati teas 7 science

Correct Answer: C

Rationale: Destructive interference occurs when two waves meet and their amplitudes are out of phase, leading to the waves cancelling each other out. This results in a reduction or complete elimination of the wave's intensity at that point. Refraction (A) is the bending of waves due to a change in medium. Diffraction (B) is the bending of waves around obstacles. Constructive interference (D) occurs when two waves align their amplitudes and reinforce each other.

Correct Answer: D

Rationale: The correct answer is D because all the options are valid obstacles to achieving controlled nuclear fusion on Earth. Lack of suitable materials (A) is crucial due to extreme conditions, limited fusion fuels (B) can hinder sustained reactions, and containing plasma (C) is challenging to prevent energy loss. Therefore, all factors must be addressed for successful fusion energy production.

Correct Answer: C

Rationale: The correct answer is C because lifting a box to place it on a shelf involves exerting a force to overcome gravity, resulting in the displacement of the box. Work is defined as the product of force and displacement in the direction of the force applied. In this scenario, the force applied (lifting the box) results in the box being displaced vertically, which meets the criteria for work being done. Choices A, B, and D do not represent work being done on an object because in these situations, the objects do not experience a displacement in the direction of the force applied. In choice A, the wall does not move, so no displacement occurs. In choice B, carrying a heavy object without lifting it does not involve any vertical displacement. In choice D, holding a book stationary in your hand does not result in any displacement of the book. Therefore, only choice C fulfills the criteria for work being done on an object.

Correct Answer: B

Rationale: The correct answer is B: One layer. Simple epithelium consists of a single layer of cells. This arrangement allows for efficient diffusion and absorption due to the short distance between cells and the underlying tissues. Option A is incorrect because epithelial tissue always has at least one layer. Option C is incorrect as it describes stratified epithelium, which has two or more layers. Option D is incorrect as it refers to stratified squamous epithelium, not simple epithelium.

Correct Answer: C

Rationale: The correct answer is C: Nasal passages. Nasal passages contain mucous membranes that produce mucus to humidify and warm inhaled air. The mucus traps particles and adds moisture to the air, making it easier for the lungs to absorb oxygen. The trachea (A) is a passageway for air but does not actively humidify or warm it. The larynx (B) is responsible for sound production and protecting the airway, not for conditioning air. The bronchi (D) are branching airways that lead from the trachea to the lungs, but they do not play a direct role in humidifying or warming inhaled air.