input: OPTIONS:
- trenches.
- mid - ocean sediments
- mid - ocean glaciers
- mid-ocean ridges Now, answer this question: Answer the following question given this paragraph: The scientists used geologic dating techniques on seafloor rocks. They found that the youngest rocks on the seafloor were at the mid-ocean ridges. The rocks get older with distance from the ridge crest. The scientists were surprised to find that the oldest seafloor is less than 180 million years old. This may seem old, but the oldest continental crust is around 4 billion years old. Q: Scientists found that the youngest rocks on the seafloor were where? A:
A:
output: mid-ocean ridges

Answer the following question given this paragraph: Groundwater deposits the material in caves as stalactites, stalagmites, and columns. Q: What helps deposit the material in caves as stalactites, stalagmites, and columns A:

OPTIONS:
- gas
- wastewater
- precipitation
- groundwater

Answer: groundwater

Problem: OPTIONS:
- muscle
- bacteria
- water
- blood
Q: Answer the following question given this paragraph: The average human body contains 5,830 g of blood. What mass of arsenic is present in the body if the amount in blood is 0.55 ppm?. Q: The average human body contains 5,830 g of what? A:
Answer: blood

Problem:OPTIONS:
- fungus
- sponge
- seaweed
- algae

Answer the following question given this paragraph: Plant-like protists are commonly called algae (alga, singular) . Some algae consist of single cells. They are called diatoms. Other algae are multicellular. An example is seaweed. Seaweed called kelp can grow as large as trees. You can see both a diatom and kelp in Figure below . Algae are probably ancestors of plants. Q: Plant-like protists are commonly called what? A:
****
A: algae

Answer the following question given this paragraph: Cnidarians are invertebrates such as jellyfish and corals. They belong to Phylum Cnidaria. All cnidarians are aquatic. Most of them live in the ocean. Cnidarians are a little more complex than sponges. Besides specialized cells, they have tissues and radial symmetry. There are more than 10,000 cnidarian species, see Figure below . Q: What type of invertebrates are jellyfish and corals known as? A:
OPTIONS:
- sponges
- nautilus
- cephalopods
- cnidarians
cnidarians

Answer the following question given this paragraph: Liquefaction of Gases Liquefaction of gases is the condensation of gases into a liquid form, which is neither anticipated nor explained by the kinetic molecular theory of gases. Both the theory and the ideal gas law predict that gases compressed to very high pressures and cooled to very low temperatures should still behave like gases, albeit cold, dense ones. As gases are compressed and cooled, however, they invariably condense to form liquids, although very low temperatures are needed to liquefy light elements such as helium (for He, 4.2 K at 1 atm pressure). Liquefaction can be viewed as an extreme deviation from ideal gas behavior. It occurs when the molecules of a gas are cooled to the point where they no longer possess sufficient kinetic energy to overcome intermolecular attractive forces. The precise combination of temperature and pressure needed to liquefy a gas depends strongly on its molar mass and structure, with heavier and more complex molecules usually liquefying at higher temperatures. In general, substances with large van der Waals acoefficients are relatively easy to liquefy because large a coefficients indicate relatively strong intermolecular attractive interactions. Conversely, small molecules with only light elements have small a coefficients, indicating weak intermolecular interactions, and they are relatively difficult to liquefy. Gas liquefaction is used on a massive scale to separate O2, N2, Ar, Ne, Kr, and Xe. After a sample of air is liquefied, the mixture is. Q: Liquefaction ccurs when the molecules of a gas are cooled to the point where they no longer possess sufficient kinetic energy to overcome what? A:
OPTIONS:
- intermolecular gravitational forces
- gravitational attractive forces
- bonding attractive forces
- intermolecular attractive forces

Answer:
intermolecular attractive forces