Answer the following question given this paragraph: The lithosphere is composed of both the crust and the uppermost mantle. The lithosphere is a brittle, rigid solid. It is easily cracked or broken. Q: Besides the uppermost mantle, what else is the lithosphere composed of? Choices: - surface - outer core - inner core - crust A:
crust
Answer the following question given this paragraph: Skeletal system problems include osteoporosis, bone fractures, and ligament sprains. A diet rick in calcium and vitamin D may reduce the risk of osteoporosis and related bone fractures. Following safe practices may also reduce the risk of fractures as well as sprains. Q: A diet rich in calcium and what vitamin may reduce the risk of osteoporosis and related bone fractures? Choices: - niacin - vitamin A - vitamin C - vitamin d A:
vitamin d
Q: Answer the following question given this paragraph: The hemisphere that is tilted away from the Sun is cooler because it receives less direct rays. As Earth orbits the Sun, the Northern Hemisphere goes from winter to spring, then summer and fall. The Southern Hemisphere does the opposite from summer to fall to winter to spring. When it is winter in the Northern hemisphere, it is summer in the Southern hemisphere, and vice versa. Q: The hemisphere that is tilted away from the sun is cooler because it receives less what? Choices: - direct electrons - x-rays - pollution - direct rays A:
A: direct rays
Question: Answer the following question given this paragraph: 19.4 Equipotential Lines We can represent electric potentials (voltages) pictorially, just as we drew pictures to illustrate electric fields. Of course, the two are related. Consider Figure 19.8, which shows an isolated positive point charge and its electric field lines. Electric field lines radiate out from a positive charge and terminate on negative charges. While we use blue arrows to represent the magnitude and direction of the electric field, we use green lines to represent places where the electric potential is constant. These are called equipotential lines in two dimensions, or equipotential surfaces in three dimensions. The term equipotential is also used as a noun, referring to an equipotential line or surface. The potential for a point charge is the same anywhere on an imaginary sphere of radius r surrounding the charge. This is true since the potential for a point charge is given by V = kQ / r and, thus, has the same value at any point that is a given distance r from the charge. An equipotential sphere is a circle in the two-dimensional view of Figure 19.8. Since the electric field lines point radially away from the charge, they are perpendicular to the equipotential lines. Q: Since the electric field lines point radially away from the charge, they are perpendicular to what? Choices: - singularity lines - archetypical lines - magnetic field lines - equipotential lines A:
Answer: equipotential lines
*Question*
Answer the following question given this paragraph: 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. Q: When a wave travels down a string, the string vibrates up and down at right angles to the wave's what? Choices: - frequency - pressure - gravity - direction A:
**Answer**
direction
Q: Answer the following question given this paragraph: Electromagnetism is magnetism produced by an electric current. Current flowing through a wire creates a magnetic field that surrounds the wire in concentric circles. Q: What is magnetism produced by an electrical current? Choices: - strong magnetism - hydromagnetism - exomagnetism - electromagnetism A:
A: electromagnetism