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
... [Show More] 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 deals MOST directly with which atoms join together to form molecules?
Chemistry
Iron ore consists mainly of iron atoms and oxygen atoms joined to each other to form iron oxide. Which branch of physical science MOST directly deals with determining the kinds of rock formations likely to contain iron ore?
Earth science
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.
Which field of science would MOST directly devise ways to detect and analyze reflected light obtained by remote sensing?
Physics
A scientist sets out to test his hypothesis that warmer sand temperatures during the incubation of turtle eggs produce female hatchlings and cooler sand temperatures produce males. The independent variable is
the temperature.
The variable that a scientist changes in an experiment is called the
independent variable.
Which term BEST describes a research project in which scientists place microphones at the bottom of the seafloor to study the sounds orca whales make?
A field study
The Hubble space telescope was launched into orbit to take far sharper images than possible on Earth. It has since collected data that show some distant stars to have planets. The scientific investigation involved is BEST described as
an observational study
Which field relies the MOST on laboratory studies?
Chemistry
Many species of fish contain a swim bladder within their body that is filled with gas and helps the fish to control and maintain their depth below the water. Which fields of science MOST directly explain the operation and evolution of the swim bladder of fish?
Physics and life science
A class carries out an experiment in which they allow the weight of the block with mass m2 to pull block m1 into motion, and then they measure the speed attained each time the hanging mass reaches the ground. They repeat this for different masses m2. The independent variable is
the mass m2.
Which topic dealt with by physics would be the MOST DIRECTLY important in life science?
How drag forces influence the motion of bacteria as they swim through water
When the electric eel needs electricity, its complex system of nerves simultaneously activates thousands of electricity-producing cells. As each cell receives the signal, it releases a tiny amount of the molecule called AChE. The study of the properties and interactions of AChE would be in the realm of
chemistry.
Ocean tides are caused by the force of gravity mainly from the moon and secondarily from the sun as Earth rotates on its axis. Which pair of physical sciences MOST directly deals with the tides and what causes them?
Physics and Earth science
Geckos are known for being able to walk on very smooth surfaces, even upside down. Tiny ridges on the gecko's feet allow it to stick to a smooth glass surface because of weak forces between the atoms in the gecko's foot and the atoms in the glass.
Which pair of physical sciences would be MOST relevant in investigating how a gecko sticks to glass?
Physics and chemistry
Which physical science MOST directly deals with the fundamental nature of time, space, energy, forces, and motion of matter?
Physics
The statement, "The total energy in a closed system stays constant,” is based on many years of experimental observations. The statement is an example of a
law
A scientific procedure done in order to test a hypothesis is
an experiment.
At a scientific conference, a researcher suggests that fossil fuels did not originate from the decomposition of organic materials but instead were produced by inorganic means. What does this statement represent?
Hypothesis
While on a hiking trip, several children become sick after drinking water from a well. What is a hypothesis concerning this situation?
Bacteria in the well may have caused the sickness.
How does a hypothesis compare with a law?
A law is supported by extensive evidence, but a hypothesis has not been tested enough to be supported by extensive evidence yet.
A scientific theory is discarded
if it is contradicted by new experiments or observations.
Theories help scientists
explain large amounts of data.
Which model can be touched?
Physical
Medical researchers want to be able to classify samples of cells by shape rapidly from the way light shining on the cells from a laser is scattered into different directions. Why might they run a computer program to calculate the scattering from different tiny egg-shaped particles for different lengths and widths instead of doing the tests on real cells?
The length, width, and height of the model cells can be adjusted more easily than with real cells. [Show Less]