Exam (elaborations)
C165 - Integrated Physical Sciences - Unit Quizzes.
C165 - Integrated Physical Sciences - Unit Quizzes.
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C165 - Integrated Physical Sciences -Unit Quizzes
The origin of water on Earth is not yet fully understood. To test one of the hypotheses,
scientists launched a gigantic observational balloon to the height of almost 130,000 feet
to measure the amounts of water in comets and asteroids based on the light reflected
from these objects. The science BEST SUITED to calculating the forces required to
launch the balloon to the required altitude is - ✔Physics
Which physical science is the BEST to study the composition of Earth's atmosphere? -
✔Earth Science
The science BEST for studying how hydrogen sulfide and carbon dioxide react is -
✔Chemistry
The science BEST for studying photosynthetic bacteria is - ✔Life Science
What is usually the main advantage of being able to do a laboratory experiment rather
than a field study if both investigations allow you to collect similar information? - ✔It is
possible to change only one variable at a time.
Some students carry out an experiment in which they tilt a wooden plank by propping up
one end with books, so that its height is a distance h above the table. The students
release a steel ball bearing at different positions along the ramp measured as x. Each
time they do this for a different value of x, they measure the speed of the ball bearing at
the end of the ramp. - ✔Anwers:
Independent variable: x
Dependent variable: Speed
Control variable: h
Which of these fields depends the MOST on observational studies? - ✔Earth Science
The kinetic theory of gases is based on the assumption that the molecules that form the
gas are in random motion and bounce off the walls of their container and off each other
as if they were billiard balls. The forces between real molecules are more complicated.
This is an example of: - ✔Using a model
Why can't astronomers carry out a scientific research study to determine which visible
star, other than our sun, is the nicest? - ✔There is no way to prove any answer wrong.
Galileo found that when air resistance can be ignored, heavier and lighter objects fall in
the same way. He tested this rule and confirmed it was consistent with all available
data.
, The rule Galileo found can BEST be described as a: - ✔Law
Which of these describes a statement that has usually NOT yet been tested? -
✔Hypothesis
It is often said that you can never prove a scientific theory right. Why? - ✔It is
impossible to directly test every single instance in which it applies.
Which of these is generally regarded by scientists to be the basis for deciding issues in
science? - ✔empirical evidence including experiments and observations
Which of the following describes how scientific investigations are carried out? -
✔Scientists use different procedures but rely on evidence and testing to confirm their
ideas.
Why is it important to have standard measures for physical quantities? - ✔To allow for
the comparison of measurements with anyone familiar with the measurement system.
What is the official SI base unit for length? - ✔Meter
Which of these is a derived quantity? - ✔Volume
Which device could NOT be used to measure length? - ✔Balance scale
Which of the following pairs of variables has an inverse relationship? - ✔Your driving
speed and the time required to drive a certain distance
The study of atoms, molecules, their structures, and their interactions to form new
substances - ✔Chemistry
Iron ore consists mainly of iron atoms and oxygen atoms joined to each other to form
several different possible forms of iron oxide. Which branch of physical science MOST
directly deals with developing ways to remove the oxygen from iron oxide, thus leaving
iron metal? - ✔Chemistry
Which field of physical science MOST directly explains how the motion of the continents
over 100 million years led to mountains and volcanoes in some places above land, and
deep ocean trenches in other places beneath the ocean surface? - ✔Earth science
Satellites orbiting Earth scan the light reflected from below, and the data can then be
analyzed to get information about the objects that reflected the light. This technology is
called "remote sensing." For example, they can even distinguish between astroturf in a
football field and real grass on the ground below, even though these look the same to
the human eye.
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