Q: Answer the following question given this paragraph: Scientists have learned a lot about the ocean floor. For example, they know that Earth's tallest mountains and deepest canyons are on the ocean floor. The major features on the ocean floor are described below. They are also shown in Figure below . Q: Surprisingly, where would you find the earth's tallest mountains and deepest canyons? A:

OPTIONS:
- Tibet
- rain forests
- taiga
- ocean floor

A: ocean floor

input: OPTIONS:
- heating
- dissolution
- liquid reactions
- chemical reactions Now, answer this question: Answer the following question given this paragraph: When studying the different states that matter exhibits, we have been looking at pure substances . Pure substances have a constant composition and can only be changed through chemical reactions. Constant composition indicates that a sample of a pure substance always contains the same elements in the same proportions. There are two main types of pure substances:. Q: Pure substances have a constant composition and can only be changed through what? A:
A:
output: chemical reactions

Answer the following question given this paragraph: 4.4 Muscle Tissue and Motion The three types of muscle cells are skeletal, cardiac, and smooth. Their morphologies match their specific functions in the body. Skeletal muscle is voluntary and responds to conscious stimuli. The cells are striated and multinucleated appearing as long, unbranched cylinders. Cardiac muscle is involuntary and found only in the heart. Each cell is striated with a single nucleus and they attach to one another to form long fibers. Cells are attached to one another at intercalated disks. The cells are interconnected physically and electrochemically to act as a syncytium. Cardiac muscle cells contract autonomously and involuntarily. Smooth muscle is involuntary. Each cell is a spindle-shaped fiber and contains a single nucleus. No striations are evident because the actin and myosin filaments do not align in the cytoplasm. Q: Skeletal, cardiac, and smooth are the three types of what cells and possess morphologies correlated with their functions? A:

OPTIONS:
- cartilage tissue
- organ
- bone
- muscle

Answer: muscle

Problem: OPTIONS:
- eclipse
- pleura
- pentila
- penumbra
Q: Answer the following question given this paragraph: The penumbra is the part of the shadow that is partially lit. Q: What is the part of the shadow that is partially lit called? A:
Answer: penumbra

Problem:OPTIONS:
- erosion
- gas
- elastic
- equilibrium

Answer the following question given this paragraph: Each separate substance in a medium, such as the extracellular fluid, has its own concentration gradient, independent of the concentration gradients of other materials. Additionally, each substance will diffuse according to that gradient. Several factors affect the rate of diffusion. Extent of the concentration gradient: The greater the difference in concentration, the more rapid the diffusion. The closer the distribution of the material gets to equilibrium, the slower the rate of diffusion becomes. Mass of the molecules diffusing: More massive molecules move more slowly, because it is more difficult for them to move between the molecules of the substance they are moving through; therefore, they diffuse more slowly. Temperature: Higher temperatures increase the energy and therefore the movement of the molecules, increasing the rate of diffusion. Solvent density: As the density of the solvent increases, the rate of diffusion decreases. The molecules slow down because they have a more difficult time getting through the denser medium. Q: In a medium, the closer the distribution of the material gets to what state, the slower the rate of diffusion becomes? A:
****
A: equilibrium

Problem:OPTIONS:
- clothing
- food
- oil
- clean drinking water

Answer the following question given this paragraph: The water Americans get from their faucets is safe. This water has been treated and purified. At least 20% of the world's people do not have clean drinking water always available. That's more than 1 billion people. They must drink water from where they can get it. Maybe straight from a river or pond ( Figure below ). Human wastes may be in the water. If that's the case, the water will probably contain pathogens. Pathogens are organisms that cause diseases. Q: At least 20 percent of the world's people do not have a ready supply of what? A:
****
A:
clean drinking water