input with options: Answer the following question given this paragraph: An experiment generally tests how one variable is affected by another. The affected variable is called the dependent variable . In the plant experiment shown above, the dependent variable is plant growth. The variable that affects the dependent variable is called the independent variable . In the plant experiment, the independent variable could be fertilizersome plants will get fertilizer, others will not. The scientists change the amount of the independent variable (the fertilizer) to observe the effects on the dependent variable (plant growth). An experiment needs to be run simultaneously in which no fertilizer is given to the plant. This would be known as a control experiment. In any experiment, other factors that might affect the dependent variable must be controlled. In the plant experiment, what factors do you think should be controlled? ( Hint: What other factors might affect plant growth?). Q: In an experiment, what is the affected variable called? A:
OPTIONS:
- form variable
- independent variable
- control variable
- dependent variable
output: dependent variable

Q: Answer the following question given this paragraph: Q: When the smooth muscle relaxes, the arterioles dilate, allowing blood to enter the what? A:

OPTIONS:
- bones
- arteries
- veins
- capillaries

A: capillaries

input: OPTIONS:
- color
- temperature
- density
- speed Now, answer this question: Answer the following question given this paragraph: 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 . Q: When light passes from one medium to another, it changes what? A:
A:
output: speed

Answer the following question given this paragraph: The cardiovascular system circulates blood through two different loops. Pulmonary circulation is a loop that carries blood between the heart and lungs. Systemic circulation is a loop that carries blood between the heart and the rest of the body. Q: What are the two loops of blood flow in the cardiovascular system? A:

OPTIONS:
- anabolic and metabolic
- aerobic and anaerobic
- systolic and diastolic
- pulmonary and systemic

Answer: pulmonary and systemic

Problem: OPTIONS:
- stop light
- twist light
- burn light
- focus light
Q: Answer the following question given this paragraph: human body system that includes all the muscles of the body. Q: Compound light microscopes use lenses to do what? A:
Answer: focus light

Answer the following question given this paragraph: Refraction is responsible for dispersion in rainbows and many other situations. The angle of refraction depends on the index of refraction, as we saw in The Law of Refraction. We know that the index of refraction n depends on the medium. But for a given medium, n also depends on wavelength. (See Table 25.2. Note that, for a given medium, n increases as wavelength decreases and is greatest for violet light. Thus violet light is bent more than red light, as shown for a prism in Figure 25.23(b), and the light is dispersed into the same sequence of wavelengths as seen in Figure 25.21 and Figure 25.22. Making Connections: Dispersion Any type of wave can exhibit dispersion. Sound waves, all types of electromagnetic waves, and water waves can be dispersed according to wavelength. Dispersion occurs whenever the speed of propagation depends on wavelength, thus separating and spreading out various wavelengths. Dispersion may require special circumstances and can result in spectacular displays such as in the production of a rainbow. This is also true for sound, since all frequencies ordinarily travel at the same speed. If you listen to sound through a long tube, such as a vacuum cleaner hose, you can easily hear it is dispersed by interaction with the tube. Dispersion, in fact, can reveal a great deal about what the wave has encountered that disperses its wavelengths. The dispersion of electromagnetic radiation from outer space, for example, has revealed much about what exists between the starsthe so-called empty space. Q: The angle of refraction depends on the index of what? A:

OPTIONS:
- frequency
- vibration
- reflection
- refraction

Answer:
refraction