Answer the following question given this paragraph: All alkali metals are very soft and can be cut easily with a knife. Due to their high reactivity, they must be stored under oil to prevent them from reacting with oxygen or water vapor in the air. The reactions between alkali metals and water are particularly vigorous and include the rapid production of large quantities of hydrogen gas. Alkali metals also react easily with most nonmetals. All of the alkali metals are far too reactive to be found in nature in their pure elemental form. For example, all naturally occurring sodium exists as a compound, such as sodium chloride (table salt). Q: The reactions between alkali metals and water are particularly vigorous and include the rapid production of large quantities of what gas? Choices: - helium - oxygen - carbon - hydrogen A:
hydrogen
Answer the following question given this paragraph: Cephalopods include the octopus and squid. They have a prominent head and a well-developed brain. Typically the foot has been modified into a set of arms or tentacles. Members of this class can change color. They can also change texture and body shape, and, and if those camouflage techniques don't work, they can still "disappear" in a cloud of ink. Cephalopods have three hearts that pump blue blood, they're jet powered by their muscular foot, and they're found in all oceans of the world. Cephalopods are thought to be the most intelligent of invertebrates. They have eyes and other senses that rival those of humans. Many cephalopods are active and efficient predators. What features do you think allows for this?. Q: Cephalopods have three hearts that pump blood of what color? Choices: - purple - Green - Red - blue A:
blue
Q: Answer the following question given this paragraph: Plants are the primary producers in terrestrial biomes. They make food for themselves and other organisms by photosynthesis. The major plants in a given biome, in turn, help determine the types of animals and other organisms that can live there. Q: What are the primary producers in terrestrial biomes? Choices: - soil - gases - animals - plants A:
A: plants
Question: Answer the following question given this paragraph: As you can see in the Figure above , the electric and magnetic fields that make up an electromagnetic wave are perpendicular (at right angles) to each other. Both fields are also perpendicular to the direction that the wave travels. Therefore, an electromagnetic wave is a transverse wave. However, unlike a mechanical transverse wave, which can only travel through matter, an electromagnetic transverse wave can travel through empty space. When waves travel through matter, they lose some energy to the matter as they pass through it. But when waves travel through space, no energy is lost. Therefore, electromagnetic waves don't get weaker as they travel. However, the energy is "diluted" as it travels farther from its source because it spreads out over an ever-larger area. Q: What may be lost when waves travel through matter, but not when they travel through space? Choices: - matter - frequency - threshold - energy A:
Answer: energy
*Question*
Answer the following question given this paragraph: Seedless vascular plants have vascular tissue but do not have seeds. Q: What type of plants have vascular tissue but do not have seeds? Choices: - rocky vascular plants - ofen vascular plants - starchy vascular plants - seedless vascular plants A:
**Answer**
seedless vascular plants
(Q).
Answer the following question given this paragraph: Red blood cells transport oxygen to the tissues so they can function. In the absence of oxygen, cells cannot carry out their biochemical responsibilities. Oxygen moves to the cells attached to hemoglobin, a protein found in the red cells. In cases of carbon monoxide poisoning, CO binds much more strongly to the hemoglobin, blocking oxygen attachment and lowering the amount of oxygen reaching the cells. Treatment involves the patient breathing pure oxygen to displace the carbon monoxide. The equilibrium reaction shown below illustrates the shift toward the right when excess oxygen is added to the system:. Q: What type of blood cells transport oxygen to the tissues so they can function? Choices: - white blood cells - mutated blood cells - depleted blood cells - red blood cells A:
(A).
red blood cells