Scientific Models And Technology Question Preview (ID: 34697)


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Paleontology is a field of science that studies prehistoric life. What is one method that paleontologists use to learn about dinosaurs?
a) They observe dinosaur behavior.
b) They read reports from when dinosaurs were alive.
c) They use fossils to see how dinosaurs looked and acted
d) They run repeated experiments to learn how dinosaurs respond to their environment.

Physicists study matter, energy, and forces. Physicists use many different methods as they search for evidence. Which is NOT a method they would use in their pursuit of scientific explanations?
a) assuming
b) experimenting
c) measuring
d) observing

Chemistry is the study of the composition of matter and its properties. Experimentation is the primary method by which chemists pursue scientific explanations. How do they know if the results of their experiments are valid?
a) They are repeatable.
b) They are measurable.
c) They match their hypothesis
d) They can be used to design another experiment.

Scientists use models to help them understand how the natural world operates. These models can take different forms. However, all models have one limitation. What is that limitation?
a) Models must be physical objects.
b) Models must be three-dimensional.
c) Models are never exactly like the real thing.
d) Models must be based on mathematical laws.

Some scientists use physical models to help them understand the natural world. Which is an example of a physical model?
a) a computer-generated image
b) a theory about the behavior of gases
c) a ball-and-stick representation of a molecule
d) a mathematical formula used to make a scientific prediction

Building models can help scientists make discoveries about the natural world. For example, scientists used cardboard cutouts of the chemical substances that make up the molecule responsible for heredity. This molecule is known as DNA. The scientists
a) a physical model
b) a computer model
c) a conceptual model
d) a mathematical model

Uncrewed spacecraft have visited every planet in the solar system, but the only celestial body visited by astronauts was the Moon. Which group of statements best explains why uncrewed spacecraft and not astronauts have visited the planets?
a) The trip would take years because the planets are so far away; engineers do not know how to plan a trip to the planets; no as
b) The trip would take years because the planets are so far away; it would be dangerous because conditions are harsh; no astrona
c) The trip would take years because the planets are so far away; it would be dangerous because conditions are harsh; it would b
d) The trip would take years because spacecraft carrying astronauts travel more slowly than uncrewed spacecraft; it would be dan

People have traveled into space many times since 1961, when a Russian cosmonaut in a tiny space capsule went into orbit around Earth. Since then, people have traveled into space in larger vehicles, including the space shuttle. Which kind of technolog
a) electronic technology that provides the controls needed to drive a spacecraft
b) rocket technology that provides enough thrust to escape the pull of Earth’s gravity
c) light-weight materials technology that provides metals and other material for spacecraft light enough to orbit Earth
d) communications technology that provides as way to send instructions to the pilot about how maneuver the craft

In addition to going into space, scientists have explored the deep ocean. Which statement best explains how the technology used to explore the deep ocean is similar to the technology used to explore space?
a) Deep ocean exploration, like space exploration, is very dangerous for people because the ocean is deep and hard to reach.
b) Deep ocean exploration, like space exploration, needs specially trained scientists to go down to the ocean floor in submersib
c) Deep ocean exploration uses crewed or uncrewed craft called submersibles and technology for taking pictures, gathering sample
d) Deep ocean exploration uses craft called submersibles, which are like spacecraft that went to the Moon, and divers in SCUBA g

Environmentalists are very concerned about the destruction of rainforests for houses, farms, and mines. A group of environmental scientists want to monitor how much of the Amazon rainforest is cut down over a five-year period. Which two technologies
a) satellite technology and computer technology
b) remote sensing and composite satellite images
c) rocket technology and composite satellite images
d) remote sensing and telecommunications technology

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