Answer the following question given this paragraph: Magma that cools underground forms intrusions ( Figure below ). Usually this magma is very viscous felsic magma. This magma does not rise easily and so cools slowly underground. Intrusions become land formations if they are exposed at the surface by uplift and erosion. Q: What does magma that cools underground form? Choices: - anomalies - plates - cracks - intrusions A:
intrusions
Answer the following question given this paragraph: Rutherford's nuclear model of the atom helped explain why atoms of different elements exhibit different chemical behavior. The identity of an element is defined by itsatomic number (Z), the number of protons in the nucleus of an atom of the element. The atomic number is therefore different for each element. The known elements are arranged in order of increasing Z in the periodic table (Figure 1.24 "The Periodic Table Showing the Elements in Order of Increasing "; also see Chapter 32 "Appendix H: Periodic Table of Elements"),. Q: Elements are defined by their atomic number, a number that describes the amount of what in the element? Choices: - bonds - electrons - neutrons - protons A:
protons
Q: Answer the following question given this paragraph: Heat from a wood fire can boil a pot of water. If you put an egg in the pot, you can eat a hard boiled egg in 15 minutes (cool it down first!). The energy to cook the egg was stored in the wood. The wood got that energy from the Sun when it was part of a tree. The Sun generated the energy by nuclear fusion. You started the fire with a match. The head of the match stores energy as chemical energy. That energy lights the wood on fire. The fire burns as long as there is energy in the wood. Once the wood has burned up, there is no energy left in it. The fire goes out. Q: How does the sun generate energy? Choices: - atomic division - matter multiplication - certain fusion - nuclear fusion A:
A: nuclear fusion
Question: Answer the following question given this paragraph: The frequency of a wave is the same as the frequency of the vibrations that caused the wave. For example, to generate a higher-frequency wave in a rope, you must move the rope up and down more quickly. This takes more energy, so a higher-frequency wave has more energy than a lower-frequency wave with the same amplitude. You can see examples of different frequencies in the Figure below (Amplitude is the distance that particles of the medium move when the energy of a wave passes through them. ). Q: What is the ratio of a wave frequency to its vibration frequency? Choices: - one - two - three - same A:
Answer: same
*Question*
Answer the following question given this paragraph: Generators may be set up to produce either alternating or direct current. Generators in cars and most power plants produce alternating current. Q: What type of current do generators in cars use? Choices: - magnum current - direct current - polar current - alternating current A:
**Answer**
alternating current
*Question*
Answer the following question given this paragraph: Q: Is sleep an active or inactive state in the brain? Choices: - intense - different - inactive - active A:
**Answer**
active