(Q).
Q: One seismogram indicates the distance to the what? Read this paragraph and choose the correct option from the provided answers: One seismogram indicates the distance to the epicenter. This is determined by the P-and S-wave arrival times. If a quake is near the seismograph, the S-waves arrive shortly after the P-waves. If a quake is far from the seismograph, the P-waves arrive long before the S-waves. The longer the time is between the P-and S-wave arrivals, the further away the earthquake was from the seismograph. First, seismologists calculate the arrival time difference. Then they know the distance to the epicenter from that seismograph. Choices: - researchers - houses - the moon - epicenter A:
(A).
epicenter

(Q).
Q: What affects how high a cake rises when it bakes? Read this paragraph and choose the correct option from the provided answers: Air pressure affects how high a cake rises when it bakes. Directions for cake mixes often have special high altitude instructions, like those on the label below. Explain why. Choices: - air currents - air movement - current pressure - air pressure A:
(A).
air pressure

(Q).
Q: Fermat's principle states that what will always take the path that takes the least amount of time? Read this paragraph and choose the correct option from the provided answers: Light is a wave of changing electric and magnetic fields. Light waves are caused by disturbances in an electromagnetic field, like the acceleration of charged particles (such as electrons). Light has a dual nature; at times, it acts like waves, while at other times it acts like particles, called photons . Light travels through space at the maximum speed allowed by the laws of physics, called the speed of light. Light has no mass, but it carries energy and momentum. Fermat's principle states that light will always take the path that takes the least amount of time (not distance). Choices: - sound - wind - electricity - light A:
(A).
light