Answer the following question given this paragraph: Figure 21.13 Extinction intensity as reflected in the fossil record has fluctuated throughout Earth's history. Sudden and dramatic losses of biodiversity, called mass extinctions, have occurred five times. Q: What are sudden and dramatic losses of biodiversity called? Choices: - explosive extinction - life extinction - normal extinction - mass extinction A:
mass extinction
Answer the following question given this paragraph: When an action and reaction occur, momentum is transferred from one object to the other. However, the combined momentum of the objects remains the same. In other words, momentum is conserved. This is the law of conservation of momentum . Q: When an action and reaction occur, what is transferred from one object to the other, yet in combination it remains the same? Choices: - matter - force - energy - momentum A:
momentum
Q: Answer the following question given this paragraph: Subduction of oceanic crust beneath a continental or oceanic plate creates a chain of volcanoes. Q: What kind of chain is formed by subduction of oceanic crust beneath a continental or oceanic plate? Choices: - chain reaction - tsunami - mountain - volcano A:
A: volcano
Question: Answer the following question given this paragraph: There are two main types of diabetes, type 1 diabetes and type 2 diabetes. Type 1 diabetes makes up about 5-10% of all cases of diabetes in the United States. Type 2 diabetes accounts for most of the other cases. Both types of diabetes are more likely in people that have certain genes. Having a family member with diabetes increases the risk of developing the disease. Q: How many main types of diabetes are there? Choices: - three - one - six - two A:
Answer: two
*Question*
Answer the following question given this paragraph: The Sun and many other light sources produce waves that are randomly polarized (see Figure 27.39). Such light is said to be unpolarized because it is composed of many waves with all possible directions of polarization. Polaroid materials, invented by the founder of Polaroid Corporation, Edwin Land, act as a polarizing slit for light, allowing only polarization in one direction to pass through. Polarizing filters are composed of long molecules aligned in one direction. Thinking of the molecules as many slits, analogous to those for the oscillating ropes, we can understand why only light with a specific polarization can get through. The axis of a polarizing filter is the direction along which the filter passes the electric field of an EM wave (see Figure 27.40). Q: The sun and many other light sources produce waves that are randomly this? Choices: - obfuscated - amplified - colored - polarized A:
**Answer**
polarized
Answer the following question given this paragraph: You hit a baseball out of the park and head for first base. You're excited. The score is tied, and now your team has a chance of getting a winning home run. Then you hear a crash. Oh no! The baseball hit a window in a neighboring house. The glass has a big hole in it, surrounded by a web of cracks (see Figure below ). The glass has changed. It's been broken into jagged pieces. But the glass is still glass. Breaking the window is an example of a physical change in matter. Q: Breaking a window with a baseball is an example of what kind of change in matter? Choices: - unusual - chemical - sudden - physical A:
physical