Answer the following question given this paragraph: Albedo is the amount of light reflected by a surface. Sea ice has an albedo of .85, meaning 85% of light is reflected back from its surface (and leaves the Earth) and 15% is absorbed and stays in the Earth; ice-free water has an albedo of .07. (93% of the solar energy is absorbed. ) Thus the observed melting of sea ice could amplify the effect of global warming. Q: What is the scientific term for the amount of light reflected by a surface? Choices: - prism - inversion - reactivity - albedo A:
albedo
Answer the following question given this paragraph: Based on their knowledge of subatomic particles, scientists have developed a theory called the standard model to explain all the matter in the universe and how it is held together. The model includes only the fundamental particles in the Table above . No other particles are needed to explain all kinds of matter. According to the model, all known matter consists of quarks and leptons that interact by exchanging bosons, which transmit fundamental forces. The standard model is a good theory because all of its predictions have been verified by experimental data. However, the model doesn't explain everything, including the force of gravity and why matter has mass. Scientists continue to search for evidence that will allow them to explain these aspects of force and matter as well. You can learn much more about the standard model at the URL below. Click on "the standard model" and follow the sequence titled "What is fundamental?". Q: What is the theory scientists use to explain the matter in the universe and how it's held together? Choices: - specific model - original model - organic model - standard model A:
standard model
Q: Answer the following question given this paragraph: Other methods of surface mining include strip mining, placer mining, and dredging. Strip mining is like open pit mining but with material removed along a strip. A quarry is a type of open-pit mine that produces rocks and minerals that are used to make buildings and roads. Q: What is the type of mining called when materials are removed along a strip? Choices: - surface mining - edge mining - pit mining - strip mining A:
A: strip mining
Question: Answer the following question given this paragraph: It's easy to get lost in the discussion of dinosaurs and theories about why they went extinct 65 million years ago. Was it due to a meteor slamming into Earth near the coast of modern-day Mexico, or was it from some long-term weather cycle that is not yet understood? One hypothesis that will never be proposed is that humans had something to do with it. Mammals were small, insignificant creatures of the forest 65 million years ago, and no humans existed. Woolly mammoths, however, began to go extinct about 10,000 years ago, when they shared the Earth with humans who were no different anatomically than humans today (Figure 45.12). Mammoths survived in isolated island populations as recently as 1700 BC. We know a lot about these animals from carcasses found frozen in the ice of Siberia and other regions of the north. Scientists have sequenced at least 50 percent of its genome and believe mammoths are between 98 and 99 percent identical to modern elephants. It is commonly thought that climate change and human hunting led to their extinction. A 2008 study estimated that climate change reduced the mammoth's range from 3,000,000 square miles 42,000 years [7] ago to 310,000 square miles 6,000 years ago. It is also well documented that humans hunted these animals. A 2012 study showed that no single factor was exclusively responsible for the extinction of these [8] magnificent creatures. In addition to human hunting, climate change, and reduction of habitat, these scientists demonstrated another important factor in the mammoth's extinction was the migration of humans across the Bering Strait to North America during the last ice age 20,000 years ago. The maintenance of stable populations was and is very complex, with many interacting factors determining the outcome. It is important to remember that humans are also part of nature. Once we contributed to a species' decline using primitive hunting technology only. Q: Mammoths, close genetic relatives of modern elephants, are believed to have gone extinct due to hunting by humans and what factor? Choices: - volcanic eruptions - earthquakes - migration change - climate change A:
Answer: climate change
*Question*
Answer the following question given this paragraph: Autotrophs are organisms that make their own food. Most autotrophs use the energy in sunlight to make food in a process called photosynthesis . Only three types of organismsplants, algae, and some bacteriacan make food through photosynthesis. Examples of each type of photosynthetic organism are shown in Figure below . Q: What is the term for organisms that make their own food? Choices: - omnivores - plastids - monocots - autotrophs A:
**Answer**
autotrophs
(Question)
Answer the following question given this paragraph: Many human actions make it easier for wind and water to carry away soil. They include plowing, logging, construction, and even some types of recreation. Q: Human actions such as plowing, logging, construction and other actions contribute to what kind of erosion? Choices: - weathering - flooding - wind erosion - soil erosion A:
(Answer)
soil erosion