*Question*
Q: From the pharynx, air next passes through what structure, also known as the voice box because it contains vocal cords? Read this paragraph and choose the correct option from the provided answers: From the pharynx, air next passes through the larynx , or voice box. The larynx contains vocal cords, which allow us to produce vocal sounds. Choices: - diaphram - trachea - pancreas - larynx A:
**Answer**
larynx

*Question*
Q: When light passes from one medium to another, it changes what? Read this paragraph and choose the correct option from the provided answers: When light passes from one medium to another, it changes speed. For example, when light passes from air to glass, it slows down. If light strikes a sheet of glass at a 90 angle, or perpendicular to the glass, it slows down but still passes straight through the glass. However, if light enters the glass at an angle other than 90, the light bends as it slows down. The bending of light as it changes speed in a new medium is called refraction . The Figure below shows how refraction occurs. Notice that the speed of light changes again as it passes from the glass back to the air. In this case, the speed increases, and the ray of light resumes its initial direction. For a more detailed explanation of refraction, watch this video: http://www. youtube. com/watch?v=8RM46yvDOHI . Choices: - color - temperature - density - speed A:
**Answer**
speed

*Question*
Q: When a wave travels down a string, the string vibrates up and down at right angles to the wave's what? Read this paragraph and choose the correct option from the provided answers: A: The wave travels down the string to the end. The string vibrates up and down at right angles to the direction of the wave. Choices: - frequency - pressure - gravity - direction A:
**Answer**
direction

*Question*
Q: Where are all hormones secreted into before entering the circulatory system? Read this paragraph and choose the correct option from the provided answers: Choices: - Amniotic fluid - blood stream - Cerebrospinal fluid - interstitial fluid A:
**Answer**
interstitial fluid