Physical science

What is an experiment in which you deliberately change only one variable and observe how a second variable changes as a result while you hold all other variables that you control constant is?

A controlled experiment A controlled experiment is one in which you keep all other variables other than dependent and independent variables constant.

9. Studying the speed of water flow in rivers by this method would be classified as a _______ study.

A field study would describe going to the actual river to do the investigation

A ____________ tentatively assumes what happens or how it happens in order to test what it assumes.

A hypothesis is a tentative statement intended to be tested.

Which science is BEST for studying how hydrogen sulfide and carbon dioxide react?

Chemistry Chemistry focuses on the study of atoms and molecules, their structures, and their interactions to form various substances

Acidic soil water reacts with common rock-forming minerals to release ions and form new minerals. Which physical science is BEST for studying these processes?

Chemistry Chemistry is needed to study interactions of substances that create new substances. Chemistry focuses on the study of atoms and molecules, their structures, and their interactions to form various substances

When a candle burns, its molecules consisting of hydrogen and carbon atoms combine with oxygen to produce carbon dioxide and water. Which physical science is BEST for dealing with the changes of the paraffin into carbon dioxide and water?

Chemistry The physical science that studies how one substance changes into other substances is chemistry.

. "When water freezes, the water molecules join weakly in a specific way" is mainly a statement about which field of science?

Chemistry deals with atoms, molecules, and substances changing into each other. Forming chemical bonds (in this case a special type known as hydrogen bonds) is mainly chemistry.

An observational balloon is filled with helium and vented to the atmosphere. The height it reaches depends on the changes of atmospheric pressure during the day and night cycle. Which science is best for studying this daily warming and cooling of the atmosphere?

Earth Science Earth science concentrates on Earth and its various parts, such as its physical structure, materials, and processes, such as volcanic and seismic activities.

Which physical science is BEST for finding the best locations to drill for the petroleum used to make the candles?

Earth Science Earth science is best suited to studying Earth's structure, including the mechanisms and likely locations for petroleum reservoirs to collect

Which physical science is the BEST for studying the composition of Earth's atmosphere?

Earth Science Earth science is best suited to studying the composition of Earth's atmosphere. Earth science concentrates on Earth and its various parts, such as its physical structure, its materials, and its processes

The water flowing in a river comes from rain and snow that collected and eventually ran into rivers. As the river flows to the sea, water evaporates from it, and from all over Earth's surface, back into the atmosphere, where the water can fall as rain and snow again. A team carries out an investigation, and it proposes that maybe the moist air is being cooled when the wind from west to east forces the air upward based on knowledge that temperatures tend to decrease with increasing height. Which term best describes this step

Formulating a hypothesis Proposing, or even just thinking of, an idea to then test is formulating a hypothesis.

Which statement BEST describes how the different physical sciences are related?

Issues mainly in one science often involve issues in the other sciences. The three different physical sciences often overlap.

Which quality identifies a scientific statement as falsifiable?

It cannot be proved true. A statement, regardless of its actual truth or falsehood, is falsifiable if there is a conceivable test that, if it gave the right result, would prove the statement false

Molecule

Made up of small atom and particles that bond together

5. "Being less dense than liquid water makes the ice float" is mainly a statement about which field of science?

Objects floating because of their density has to do with the forces that the water exerts on the object (in this case ice), which is a physics topic.

Auroras are bursts of light that happen when charged particles from the sun interact with Earth's magnetic field and atoms and molecules in our atmosphere. Which physical science is best suited to explain the interactions of the charged particles with Earth's magnetic field?

Physics Physics can explain the interactions of charged particles with the Earth's magnetic field because magnetic fields are forces.

The sun produces its energy by nuclear fusion reactions, in which smaller nuclei are combined to produce larger nuclei. Forces responsible for the nuclear fusion are called nuclear forces. What is the physical science that studies nuclear forces?

Physics Physics is the science that studies the nuclear processes in the sun.

When a candle burns, its molecules consisting of hydrogen and carbon atoms combine with oxygen to produce carbon dioxide and water. Which physical science is BEST for dealing with how the light from the candle travels through space?

Physics Physics is the study of matter and energy. Physics also includes different forces that govern everything from sound waves to planetary orbits.

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. What is the science best suited to calculating the forces required to launch the balloon to the required altitude?

Physics Physics studies forces, including motion, which relates directly to the movement of celestial objects

2. Which field of science would primarily be used in studying the details of how moving water flowing around an object such as a pebble can exert enough force to lift it and carry it?

Physics is the physical science that deals with forces and motion.

6. "The river freezes on its surface first" is mainly a statement about which field of science?

Rivers freezing by forming a layer of ice on top is very much an Earth science topic.

The dependent variable is ___________.

The distance is the variable that depends on the other variable.

. Which field of science would primarily be used in studying the effect of weathering and erosion on features of the landscape over long periods of time?

The effect of processes of this sort on Earth's features is part of Earth science.

Chemistry

The study of the properties and interactions of substances

In measuring the distance at each time, the independent variable is

The team member controls the times at which the data are collected, so time is the independent variable

After hearing about the research, one of the students in a class asks the professor, "What is the nicest river in America?" Why can't research in Earth science answer this simple question?

There is no falsifiable answer If someone named a river as the nicest, there would be no way to prove the statement false because niceness is purely a personal opinion.

Complete the sentence: A model in science is _____.

a simpler system that is analogous to the real system. A model is used because it is simpler than the actual system but includes the essential feature being studied and is, therefore, analogous to the real system.

Studying the speed of water flow in rivers is an example of _________ experiment.

an uncontrolled A field study almost always has hidden variables that the researcher collecting the data cannot hold constant

Variables

factors that can change in an experiment

Atoms

make up all matter