Problem: OPTIONS:
- at rest
- at homeostasis
- when accelerating
- zero net force
Q: Answer the following question given this paragraph: Figure 9.3 This car is in dynamic equilibrium because it is moving at constant velocity. There are horizontal and vertical forces, but the net external force in any direction is zero. The applied force F app between the tires and the road is balanced by air friction, and the weight of the car is supported by the normal forces, here shown to be equal for all four tires. Q: When is a moving car said to be in dynamic equilibrium? A:
Answer: zero net force

Problem:OPTIONS:
- slowly
- quickly
- symmetrically
- easily

Answer the following question given this paragraph: Reactive elements combine easily with other elements. This explains why they usually exist in nature in compounds rather than in pure form. Q: Reactive elements are able to combine more what with other elements? A:
****
A: easily

Answer the following question given this paragraph: There are about 50,000 living species of vertebrates. They are placed in nine classes: five classes of fish plus amphibians, reptiles, birds, and mammals. Q: In addition to five classes of fish, what other classes make up the species of vertebrates? A:
OPTIONS:
- amphibians , vertebrae , birds , and mammals
- reptiles, birds, mammals, and primates
- insects, amphibians, reptiles, and birds
- amphibians, reptiles, birds, and mammals
amphibians, reptiles, birds, and mammals

Answer the following question given this paragraph: Wind-blown pollen might land anywhere and be wasted. Another adaptation solved this problem. Plants evolved traits that attract specific animal pollinators . Like the bee in Figure below , a pollinator picks up pollen on its body and carries it directly to another plant of the same species. This greatly increases the chance that fertilization will occur. Q: What does a pollinator pick from its body and carry directly to another plant of the same species? A:
OPTIONS:
- spore
- pathogen
- egg
- pollen

Answer: pollen

Question: Answer the following question given this paragraph: Most air masses form over polar or tropical regions. They may form over continents or oceans. Air masses are moist if they form over oceans. They are dry if they form over continents. Air masses that form over oceans are called maritime air masses. Those that form over continents are called continental air masses. Figure below shows air masses that form over or near North America. Q: Most air masses form over what two types of regions? A:
OPTIONS:
- arctic and marine
- polar and arctic
- marine and tropical
- polar and tropical
Answer: polar and tropical

input: OPTIONS:
- petals
- nanotubes
- volatiles
- fiddleheads Now, answer this question: Answer the following question given this paragraph: The first leaves of most ferns appear curled up into fiddleheads. Q: The first leaves of most ferns appear curled up into what? A:
A:
output:
fiddleheads