*Question*
Q: What type of numerical figure is important in considering the precision and accuracy of a number? Read this paragraph and choose the correct option from the provided answers: Next, we identify the least precise measurement: 13.7 kg. This measurement is expressed to the 0.1 decimal place, so our final answer must also be expressed to the 0.1 decimal place. Thus, the answer is rounded to the tenths place, giving us 15.2 kg. Significant Figures in this Text In this text, most numbers are assumed to have three significant figures. Furthermore, consistent numbers of significant figures are used in all worked examples. You will note that an answer given to three digits is based on input good to at least three digits, for example. If the input has fewer significant figures, the answer will also have fewer significant figures. Care is also taken that the number of significant figures is reasonable for the situation posed. In some topics, particularly in optics, more accurate numbers are needed and more than three significant figures will be used. Finally, if a number is exact, such as the two in the formula for the circumference of a circle, c = 2r , it does not affect the number of significant figures in a calculation. Choices: - component - insignificant - exponent - significant A:
**Answer**
significant

*Question*
Q: Why are continents unable to be pushed down into the mantle by plate boundaries? Read this paragraph and choose the correct option from the provided answers: Most of the world's largest mountains form as plates collide at convergent plate boundaries. Continents are too buoyant to get pushed down into the mantle. So when the plates smash together, the crust crumples upwards. This creates mountains. Folding and faulting in these collision zones makes the crust thicker. Choices: - gravity - surface tension - density - buoyancy A:
**Answer**
buoyancy

*Question*
Q: What does continental crust grade into at continental margins? Read this paragraph and choose the correct option from the provided answers: Think of a continent, like North America. Surrounding the continent are continental margins . Continental crust grades into oceanic crust at continental margins. Continental margins are under water. Almost all of North America sits on the North American Plate ( Figure below ). Both sides of the continent have continental margins, but each is very different. One continental margin of North America is an active margin. The other is a passive margin. Can you guess which is which?. Choices: - ocean floor - storm crust - remnants crust - oceanic crust A:
**Answer**
oceanic crust

*Question*
Q: What fluid becomes less viscous, allowing for better joint function after stretching? Read this paragraph and choose the correct option from the provided answers: Exercise and Stretching When exercising, it is important to first warm up the muscles. Stretching pulls on the muscle fibers and it also results in an increased blood flow to the muscles being worked. Without a proper warm-up, it is possible that you may either damage some of the muscle fibers or pull a tendon. A pulled tendon, regardless of location, results in pain, swelling, and diminished function; if it is moderate to severe, the injury could immobilize you for an extended period. Recall the discussion about muscles crossing joints to create movement. Most of the joints you use during exercise are synovial joints, which have synovial fluid in the joint space between two bones. Exercise and stretching may also have a beneficial effect on synovial joints. Synovial fluid is a thin, but viscous film with the consistency of egg whites. When you first get up and start moving, your joints feel stiff for a number of reasons. After proper stretching and warm-up, the synovial fluid may become less viscous, allowing for better joint function. Choices: - proximal - vertebral - cranial - synovial A:
**Answer**
synovial