Integrated Physical Sciences (C165)
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Free Integrated Physical Sciences (C165) Questions
In 1996, NASA scientists claimed that a Martian meteor contained chemical compounds that indicated life on Mars 3.6 billion years ago. However, further studies showed that the same chemical compounds were found in rocks from the Moon, where no life ever existed. What is the appropriate scientific approach for dealing with this contradiction?
- Conclude that there must have been life on the Moon at some time in the past
- Decide that life could never have existed on Mars because the chemicals are also found on the Moon
- Determine that the chemical compounds that were found do not necessarily indicate life
- Accept the idea that there has been life on Mars because the scientists worked for NASA
Explanation
Explanation
Correct answer: (C) Determine that the chemical compounds that were found do not necessarily indicate life
Scientific reasoning requires revising interpretations when new evidence contradicts earlier conclusions. If the same chemical compounds are found in environments where life clearly did not exist, then those compounds cannot be considered definitive indicators of life. The appropriate scientific response is to reinterpret the evidence and conclude that the presence of those compounds alone is insufficient to confirm biological activity.
A grocery store manager notices that items placed on the end of an aisle sell better than items on the shelves. The manager suspects that items on the end of an aisle are more visible to customers walking past, so customers are more likely to purchase them. Which type of scientific idea is the manager's assumption that visibility of items increases how often they are purchased?
- Theory
- Observation
- Law
- Hypothesis
Explanation
Explanation
Correct answer: (D) Hypothesis
A hypothesis is a testable and tentative explanation for an observed phenomenon that can be investigated through further observation or experimentation. The manager’s idea that increased visibility leads to higher purchase rates is a proposed explanation for the observed sales pattern and can be tested by changing product placement and measuring sales differences.
Two boxes sitting on the floor look identical, but one has more mass than the other. What happens when the same net force, sufficient to overcome static friction, is applied to each box
-
The box with less mass remains stationary.
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The box with more mass moves faster.
-
The basket will move up.
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The box with less mass accelerates more.
Explanation
Correct Answer D: The box with less mass accelerates more.
Explanation:
According to Newton's second law of motion (F = ma), the acceleration of an object is inversely proportional to its mass when the same net force is applied. Therefore, the box with less mass will accelerate more than the box with more mass.
Why other options are wrong:
A) The box with less mass remains stationary:
This is incorrect because the force applied is sufficient to overcome static friction and move both boxes.
B) The box with more mass moves faster:
This is incorrect because the box with more mass will accelerate slower than the box with less mass, given the same net force.
C) The basket will move up:
This option is unrelated to the scenario of the two boxes and does not address the forces or acceleration at play.
An air mass rises and cools in a sunny area, causing cloud formation. Which type of weather pattern is responsible?
- Warm front
- High-pressure system
- Low-pressure system
- Cold front
Explanation
Explanation
Correct answer: (C) Low-pressure system
Low-pressure systems are characterized by rising air. As the air rises, it cools and water vapor condenses, leading to cloud formation and often precipitation. High-pressure systems, in contrast, involve sinking air and generally clear weather.
The model above represents the parts of an atom. What type of particle is B?
- Ion
- Electron
- Proton
- Neutron
Explanation
Explanation:
Correct answer: (C.) Proton
In the model, B is the red particle with a positive charge, which represents a proton. Protons are positively charged particles found in the nucleus of the atom. The blue particles are electrons, which are negatively charged and orbit the nucleus, while the yellow particles represent neutrons, which have no charge.
An electron is transferred from one atom to another.
Which type of bond is formed?
- Covalent bond
- Ionic bond
- Metallic bond
- Elemental bond
Explanation
When an electron is transferred from one atom to another, an ionic bond is formed. In an ionic bond, one atom donates an electron to another, resulting in the formation of positively and negatively charged ions that are attracted to each other. This is in contrast to a covalent bond, where electrons are shared, and metallic bonds, which involve a sea of electrons shared among metal atoms.
Correct Answer Is:
B. Ionic bond
When the universe first formed, it consisted mainly of hydrogen atoms. Over time, the hydrogen atoms began to collect together to form large balls of hydrogen gas. The hydrogen atoms continued to attract each other, moving closer together. Eventually, pressure and temperature at the center of the cloud of hydrogen became high enough for nuclear fusion to begin. This formed the first generation of stars in the universe.
What caused these early stars to form?
- Momentum from the big bang
- Gravitational force between hydrogen atoms
- Pressure from the expanding universe
- Magnetic force between hydrogen atoms
Explanation
The formation of the first stars was primarily driven by gravitational force between hydrogen atoms. Gravity pulled the hydrogen atoms together, increasing the density and temperature at the center of the gas cloud. Once the conditions were right, nuclear fusion began, marking the birth of the first stars. The other forces mentioned do not play a significant role in the formation of stars in the same way as gravity.
Correct Answer Is:
B. Gravitational force between hydrogen atoms
Sand is composed of small rock and mineral particles.
Which type of substance is sand?
- Mixture
- Compound
- Isotope
- Element
Explanation
Sand is a mixture because it is composed of various minerals and rock particles that are not chemically bonded together. Each particle in the sand retains its individual properties, making it a heterogeneous mixture. A compound consists of chemically bonded elements, while an isotope refers to atoms of the same element with different numbers of neutrons.
Correct Answer Is:
A. Mixture
Which property is associated with ionic bonds?
- Atoms with opposite charges are attracted.
- Valence electrons move freely among atoms.
- An electron sea is the attractive force.
- Electrons are shared among atoms.
Explanation
Explanation
Correct answer: (A) Atoms with opposite charges are attracted.
Ionic bonds form when one atom transfers electrons to another, creating positively and negatively charged ions. These oppositely charged ions are held together by electrostatic attraction, which is the defining property of ionic bonding.
Which of the following force statements is FALSE
-
A force is a push or a pull.
-
A force can cause a change in motion.
-
A force is not needed to cause acceleration.
-
Acceleration is caused by a force.
Explanation
Correct Answer C: A force is not needed to cause acceleration.
Explanation:
According to Newton's second law of motion, a force is required to cause acceleration. This statement is false because acceleration cannot occur without a force acting on an object.
Why other options are wrong:
A) A force is a push or a pull:
This statement is true, as force is defined as any interaction that can cause a change in an object's motion, which can be a push or pull.
B) A force can cause a change in motion:
This statement is true because a force can change the velocity or direction of an object, which is a change in motion.
D) Acceleration is caused by a force:
This statement is true, following Newton's second law, which states that acceleration is the result of a net force acting on an object
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Frequently Asked Question
SCIE 1020 C165 covers fundamental principles of physical sciences, including Newton’s Laws of Motion, energy transfer, the greenhouse effect, atomic structure, chemical reactions, forces, and properties of matter.
The best approach includes reviewing course materials, taking practice quizzes, watching explanatory videos, and applying concepts to real-world scenarios to strengthen understanding.
Newton’s First Law (the Law of Inertia) explains why objects resist changes in motion, such as why passengers lurch forward when a car suddenly stops.
Water’s high specific heat capacity allows it to absorb and release heat slowly, helping stabilize temperatures in coastal and oceanic environments.
Greenhouse gases trap infrared radiation emitted by Earth's surface, preventing heat from escaping and leading to an increase in global temperatures.
The three types of heat transfer are conduction (direct contact), convection (fluid movement), and radiation (electromagnetic waves).
Kinetic energy is the energy of motion (e.g., a moving car), while potential energy is stored energy (e.g., a stretched rubber band).