Answer the following question given this paragraph: Think about the coil of an electric stove as it heats up. The coil changes in color as its temperature rises. When you first turn on the heat, the coil looks black. The air a few inches above the coil begins to feel warm. As the coil gets hotter, it starts to glow a dull red. As it gets even hotter, it becomes a brighter red. Next it turns orange. If it gets extremely hot, it might look yellow-white, or even blue-white. Like a coil on a stove, a star's color is determined by the temperature of the star's surface. Relatively cool stars are red. Warmer stars are orange or yellow. Extremely hot stars are blue or blue-white. Q: Similar to the coil on a stove, changes in what reflect an increase in the temperature of a star? Choices: - texture - direction - rotation - color A:
color
Answer the following question given this paragraph: Q: What term is used to describe the conditions in the sky on any particular day? Choices: - forecast - humidity - temperature - weather A:
weather
Q: Answer the following question given this paragraph: Carbon dioxide is an oxide of carbon, while water is an oxide of hydrogen. Early scientists viewed oxidation as a process in which a substance was reacted with oxygen to produce one or more oxides. In the previous examples, magnesium and methane are being oxidized. Q: Water is an oxide of what element? Choices: - nitrogen - helium - carbon - hydrogen A:
A: hydrogen
Question: Answer the following question given this paragraph: Earliest Reptile: Hylonomus. The earliest known reptile is given the genus name Hylonomus. It was about 20 to 30 centimeters (8 to 12 inches) long, lived in swamps, and ate insects and other small invertebrates. Q: What is the earliest reptile? Choices: - sporozoans - pliosaur - staurikosaurus - hylonomus A:
Answer: hylonomus
*Question*
Answer the following question given this paragraph: wavelength : The distance between two crests of a wave of light. The color of light is related to its wavelength. This is inversely proportional to frequency. Q: The distance between two crests of a wave of light is referred to as what, which is related to the color of light? Choices: - magnitude - spectrum - bandwidth - wavelength A:
**Answer**
wavelength
(Q).
Answer the following question given this paragraph: Cells share the same needs: the need to get energy from their environment, the need to respond to their environment, and the need to reproduce. Cells must also be able to separate their relatively stable interior from the ever-changing external environment. They do this by coordinating many processes that are carried out within organelles, or other cellular structures. Structures that are common to many different cells indicate the common history shared by cell-based life. Examples of these common structures include the components of both the cell (or plasma) membrane and the cytoskeleton, and other structures shown in Figure above . Q: Cells must also be able to separate their relatively stable interior from what? Choices: - their habitat - predators - competition and chaos - the external environment A:
(A).
the external environment