Q: How does the diaphragm look like when it is at rest? Read this paragraph and choose the correct option from the provided answers: The Diaphragm The change in volume of the thoracic cavity during breathing is due to the alternate contraction and relaxation of the diaphragm (Figure 11.17). It separates the thoracic and abdominal cavities, and is dome-shaped at rest. The superior surface of the diaphragm is convex, creating the elevated floor of the thoracic cavity. The inferior surface is concave, creating the curved roof of the abdominal cavity. Choices: - flat - inverted - dam - shaped - dome-shaped A:
dome-shaped

Q: In a scientific experiment, the variable that is affected by the other one is called what? Read this paragraph and choose the correct option from the provided answers: An experiment generally tests how one variable is affected by another. The affected variable is called the dependent variable . In the plant experiment shown in the Figure 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 is fertilizersome plants will get fertilizer, others will not. 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?). Choices: - effective variable - essential variable - independent variable - dependent variable A:
dependent variable

Q: What device is used to study charge? Read this paragraph and choose the correct option from the provided answers: An electroscope is a device used to study charge. When a positively charged object (the rod) nears the upper post, electrons flow to the top of the jar leaving the two gold leaves postivley charged. The leaves repel each other since both hold postive, like charges. The VSEPR theory says that electron pairs, also a set of like charges, will repel each other such that the shape of the molecule will adjust so that the valence electron-pairs stay as far apart from each other as possible. Choices: - microtome - nannostomus - microscope - electroscope A:
electroscope

Q: Bones are part of which body system? Read this paragraph and choose the correct option from the provided answers: The brain and spinal cord are protected within bones of the skeletal system, but injuries to these organs still occur. With mild injuries, there may be no lasting effects. With severe injuries, there may be permanent disability or even death. Choices: - hard system - circulation system - muscular system - skeletal system A:
skeletal system