input: OPTIONS:
- large holes
- light holes
- star holes
- black holes Now, answer this question: Answer the following question given this paragraph: Black holes Black holes are objects having such large gravitational fields that things can fall in, but nothing, not even light, can escape. Bodies, like the Earth or the Sun, have what is called an escape velocity. If an object moves straight up from the body, starting at the escape velocity, it will just be able to escape the gravity of the body. The greater the acceleration of gravity on the body, the greater is the escape velocity. As long ago as the late 1700s, it was proposed that if the escape velocity is greater than the speed of light, then light cannot escape. Simon Laplace (17491827), the French astronomer and mathematician, even incorporated this idea of a dark star into his writings. But the idea was dropped after Young's double slit experiment showed light to be a wave. For some time, light was thought not to have particle characteristics and, thus, could not be acted upon by gravity. The idea of a black hole was very quickly reincarnated in 1916 after Einstein's theory of general relativity was published. It is now thought that black holes can form in the supernova collapse of a massive star, forming an object perhaps 10 km across and having a mass greater than that of our Sun. It is interesting that several prominent physicists who worked on the concept, including Einstein, firmly believed that nature would find a way to prohibit such objects. Black holes are difficult to observe directly, because they are small and no light comes directly from them. In fact, no light comes from inside the event horizon, which is defined to be at a distance from the object at which the escape velocity is exactly the speed of light. The radius of the event horizon is known as the Schwarzschild radius R S and is given by. Q: Not even light can escape from what extremely dense object sometimes found in deep space? A:
A:
output: black holes

Answer the following question given this paragraph: The sporophyte produces haploid spores. The rhizoid buds to form a mature gametophyte. The zygote is housed in the venter. Figure 25.21 Which of the following statements about the fern life cycle is false? a. Sporangia produce haploid spores. The sporophyte grows from a gametophyte. The sporophyte is diploid and the gametophyte is haploid. Sporangia form on the underside of the gametophyte. Q: In some plants, the sporophyte is diploid, while the gametophyte is what? A:

OPTIONS:
- gametes
- humanoid
- meiosis
- haploid

Answer: haploid

Problem: OPTIONS:
- forehead air bubble
- gills
- metallic air bubble
- shiny air bubble
Q: Answer the following question given this paragraph: 11.8 Cohesion and Adhesion in Liquids: Surface Tension and Capillary Action Cohesion and Adhesion in Liquids Children blow soap bubbles and play in the spray of a sprinkler on a hot summer day. (See Figure 11.27. ) An underwater spider keeps his air supply in a shiny bubble he carries wrapped around him. A technician draws blood into a small-diameter tube just by touching it to a drop on a pricked finger. A premature infant struggles to inflate her lungs. What is the common thread? All these activities are dominated by the attractive forces between atoms and molecules in liquidsboth within a liquid and between the liquid and its surroundings. Attractive forces between molecules of the same type are called cohesive forces. Liquids can, for example, be held in open containers because cohesive forces hold the molecules together. Attractive forces between molecules of different types are called adhesive forces. Such forces cause liquid drops to cling to window panes, for example. In this section we examine effects directly attributable to cohesive and adhesive forces in liquids. Q: What does an underwater spider use to breathe and keep alive? A:
Answer: shiny air bubble

Problem:OPTIONS:
- Copper
- Gold
- Aluminum
- iron

Answer the following question given this paragraph: Rust is a combination of several different oxides of iron. The equations below show the steps involved in one of the many processes of rust formation. Q: Rust consists of oxides of what element? A:
****
A: iron

Answer the following question given this paragraph: The most common type of brain injury is a concussion. This is a bruise on the surface of the brain. It may cause temporary symptoms such as headache and confusion. Most concussions heal on their own in a few days or weeks. However, repeated concussions can lead to permanent changes in the brain. More serious brain injuries also often cause permanent brain damage. Q: What is the most common type of brain injury? A:
OPTIONS:
- Diffuse Axonal
- Anoxic Event
- Contusion
- concussion
concussion

Answer the following question given this paragraph: The major types of radioactivity include alpha particles, beta particles, and gamma rays. Q: Alpha particles, beta particles, and gamma particles are major types of what? A:
OPTIONS:
- visible light
- sound waves
- microscopy
- radioactivity

Answer:
radioactivity