Answer the following question given this paragraph: In the absence of a net force, objects move in a straight line. If they turn that is, if their velocity changes, even only in direction there must be an applied force. Forces which cause objects to turn around continuously in a circle are known as centripetal forces. When an object moves in a circle its velocity at any particular instant points in a direction tangent to the circle. The acceleration points towards the center of the circle, and so does the force acting on it. This is only natural, when you think about it if you feel a force pushing you towards your left as you walk forward, you will walk in a circle, always turning left. Q: Forces which cause objects to turn around continuously in a circle are known as? Choices: - frictional forces - tension forces - hydrodynamic forces - centripetal forces A:
centripetal forces
Answer the following question given this paragraph: The two tonsils are located on either side of the throat. They trap pathogens that enter the body through the mouth or nose. Q: Where are the two tonsils located? Choices: - sinus - nose - tooth - throat A:
throat
Q: Answer the following question given this paragraph: Chemical reactions always involve energy. When methane burns, for example, it releases energy in the form of heat and light. Other chemical reactions absorb energy rather than release it. Q: Chemical reactions always involve energy. when methane burns, for example, it releases energy in the form of what? Choices: - movement and light - light and sound - heat and movement - heat and light A:
A: heat and light
Question: Answer the following question given this paragraph: The properties of cyclic hydrocarbons are generally quite similar to those of the corresponding open-chain compounds. So cycloalkanes (with the exception of cyclopropane, which has a highly strained ring) act very much like noncyclic alkanes. Cyclic structures containing five or six carbon atoms, such as cyclopentane and cyclohexane, are particularly stable. We will see in Chapter 16 "Carbohydrates" that some carbohydrates (sugars) form five- or six-membered rings in solution. Q: The properties of cyclic hydrocarbons are generally quite similar to those of the corresponding open-chain compounds. so cycloalkanes (with the exception of cyclopropane, which has a highly strained ring) act very much like noncyclic alkanes. cyclic structures containing five or six carbon atoms, such as cyclopentane and cyclohexane, are particularly what? Choices: - large - reactive - small - stable A:
Answer: stable
*Question*
Answer the following question given this paragraph: Some minerals are valuable simply because they are beautiful. Jade has been used for thousands of years in China. Native Americans have been decorating items with turquoise since ancient times. Minerals like jade, turquoise, diamonds, and emeralds are gemstones. A gemstone is a material that is cut and polished to use in jewelry. Many gemstones, such as those shown in Figure below , are minerals. Q: Which mineral do native americans use to decorate items? Choices: - Tanzanite - Topaz - Amethyst - turquoise A:
**Answer**
turquoise
Answer the following question given this paragraph: In this lesson, you learned some of the ways that humans differ from other mammals. For example, humans have a larger and more complex brain than other mammals. That's why they are also the most intelligent mammals. The next chapter introduces the biology of the human animal. Q: What mammal is the most intelligent? Choices: - dog - monkey - lion - humans A:
humans