Question: Answer the following question given this paragraph: During World War II, battleships and submarines carried echo sounders. Their goal was to locate enemy submarines ( Figure below ). Echo sounders produce sound waves that travel outward in all directions. The sound waves bounce off the nearest object and then return to the ship. Scientists know the speed of sound in seawater. They then can calculate the distance to the object that the sound wave hit. Most of these sound waves did not hit submarines. They instead were used to map the ocean floor. Q: What produces sound waves that travel outward in all directions in water? A:
OPTIONS:
- echo chamber
- ultrasound machines
- amplifiers
- echo sounders
Answer: echo sounders

input with options: Answer the following question given this paragraph: Earth itself acts like a gigantic gyroscope. Its angular momentum is along its axis and points at Polaris, the North Star. But Earth is slowly precessing (once in about 26,000 years) due to the torque of the Sun and the Moon on its nonspherical shape. Q: Earth acts like a giant version of what device, with angular momentum along its axis and pointing at polaris, the north star? A:
OPTIONS:
- compass
- telescope
- accelerator
- gyroscope
output: gyroscope

Q: Answer the following question given this paragraph: Clouds form when water vapor condenses in the air around specs of matter. Clouds are classified on the basis of where and how they form. Types of clouds include cirrus, stratus, and cumulus clouds. Q: What form when water vapor condenses in the air around specs of matter? A:

OPTIONS:
- humidity
- storms
- condensation
- clouds

A: clouds

input: OPTIONS:
- ionic
- constant
- negative
- positive Now, answer this question: Answer the following question given this paragraph: Electric charge is a physical property of particles or objects that causes them to attract or repel each other without touching. All electric charge is based on the protons and electrons in atoms. A proton has a positive electric charge, and an electron has a negative electric charge (see Figure below ). Q: What kind of charge does a proton have? A:
A:
output: positive

Answer the following question given this paragraph: 21.2 | Threats to Biodiversity By the end of this section, you will be able to: Identify significant threats to biodiversity Explain the effects of habitat loss, exotic species, and hunting on biodiversity Identify the early and predicted effects of climate change on biodiversity The core threat to biodiversity on the planet, and therefore a threat to human welfare, is the combination of human population growth and the resources used by that population. The human population requires resources to survive and grow, and those resources are being removed unsustainably from the environment. The three greatest proximate threats to biodiversity are habitat loss, overharvesting, and introduction of exotic species. The first two of these are a direct result of human population growth and resource use. The third results from increased mobility and trade. A fourth major cause of extinction, anthropogenic (human-caused) climate change, has not yet had a large impact, but it is predicted to become significant during this century. Global climate change is also a consequence of human population needs for energy and the use of fossil fuels to meet those needs (Figure 21.7). Environmental issues, such as toxic pollution, have specific targeted effects on species, but are not generally seen as threats at the magnitude of the others. Q: The three greatest proximate threats to biodiversity are habitat loss, overharvesting, and introduction of what? A:

OPTIONS:
- solar radiation
- carbon dioxide
- carbon monoxide
- exotic species

Answer: exotic species

Q: Answer the following question given this paragraph: Q: What specific part of the african violet is used to propagate other plants? A:

OPTIONS:
- petals
- spores
- roots
- leaves

A:
leaves