Answer the following question given this paragraph: Reflected waves have the same speed and frequency as the original waves before they were reflected. However, the direction of the reflected waves is different. When waves strike an obstacle head on, the reflected waves bounce straight back in the direction they came from. When waves strike an obstacle at any other angle, they bounce back at the same angle but in a different direction. This is illustrated in the Figure below . In this diagram, waves strike a wall at an angle, called the angle of incidence. The waves are reflected at the same angle, called the angle of reflection, but in a different direction. Notice that both angles are measured relative to a line that is perpendicular to the wall. Q: When waves are reflected at the same angle, what is it called? Choices: - field of view - refraction - phenomenon of reflection - angle of reflection A:
angle of reflection
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:
direction
Q: Answer the following question given this paragraph: Many compounds form molecules, but ionic compounds form crystals instead. A crystal consists of many alternating positive and negative ions bonded together in a matrix. Look at the crystal of sodium chloride (NaCl) in the Figure below . The sodium and chloride ions are attracted to each other because they are oppositely charged, so they form ionic bonds. Q: What type of compounds can form crystals? Choices: - integral compounds - magnetic compounds - molecular compounds - ionic compounds A:
A: ionic compounds
Question: Answer the following question given this paragraph: Q: What is above each leaf scar? Choices: - chambered pitch - lenticel - stipule scar - an axillary bud A:
Answer: an axillary bud
*Question*
Answer the following question given this paragraph: Cold air is dense, so it sinks. This creates a center of high pressure. Warm air is less dense so it rises. This creates a center of low pressure. Air always flows from higher to lower pressure. As the air flows, Earth's surface rotates below it causing Coriolis effect. So while the wind blows into the low pressure, it revolves in a circular pattern. This wind pattern forms a cyclone. The same happens while the wind blows out of a high pressure. This forms an anticyclone. Both are shown in Figure below . Q: How does air always flow? Choices: - in to out - left to right - low to high - high to low A:
**Answer**
high to low
Answer the following question given this paragraph: Part of a cycle that holds an element or water for a long period of time is called a reservoir . The ocean is a reservoir for water. The deep ocean may hold water for thousands of years. Q: What is part of a cycle that holds an element or water for a long period of time called? Choices: - homeostasis - a ditch - a holding tank - a reservoir A:
a reservoir