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Questions and Answers
A scientist observes iron rusting in humid conditions. Which of the following best describes the type of change occurring and the underlying process?
A scientist observes iron rusting in humid conditions. Which of the following best describes the type of change occurring and the underlying process?
- Phase change; due to the iron's transition from a solid to a dissolved state.
- Physical change; driven by an increase in temperature causing a phase transition.
- Chemical change; involving a reaction between iron, oxygen, and water, forming iron oxide. (correct)
- Nuclear change; resulting from the radioactive decay of iron atoms.
Consider a scenario where a car is moving at a constant velocity and then accelerates. How does the car's kinetic energy change, and what is the primary factor influencing this change?
Consider a scenario where a car is moving at a constant velocity and then accelerates. How does the car's kinetic energy change, and what is the primary factor influencing this change?
- Remains constant; with the acceleration only affecting the car's potential energy.
- Decreases; primarily influenced by the rolling friction of the tires.
- Increases; primarily depending on the change in the car's velocity. (correct)
- Increases; mainly due to the increased force applied by the brakes.
Suppose a researcher is investigating the rate of photosynthesis in different plants. Which environmental factor would be most crucial to control to ensure accurate and comparable results?
Suppose a researcher is investigating the rate of photosynthesis in different plants. Which environmental factor would be most crucial to control to ensure accurate and comparable results?
- Light intensity, since it directly influences the rate of the reaction. (correct)
- Air pressure, influencing gas solubility in plant tissues.
- Soil pH level, as it affects nutrient absorption.
- Wind speed, determining water evaporation rate.
Consider a closed container holding a gas. If the temperature of the gas is increased, how will this affect the pressure exerted on the container's walls, assuming the volume remains constant?
Consider a closed container holding a gas. If the temperature of the gas is increased, how will this affect the pressure exerted on the container's walls, assuming the volume remains constant?
If a neutral object loses electrons, what type of electrical charge will it possess?
If a neutral object loses electrons, what type of electrical charge will it possess?
Consider the human respiratory system. If the diaphragm contracts, what happens to the volume of the thoracic cavity and how does this affect airflow?
Consider the human respiratory system. If the diaphragm contracts, what happens to the volume of the thoracic cavity and how does this affect airflow?
When comparing acids and bases, which statement accurately describes a key difference in their properties?
When comparing acids and bases, which statement accurately describes a key difference in their properties?
Given our current understanding of renewable energy, which of the following scenarios would be most sustainable in the long term for a community seeking energy independence?
Given our current understanding of renewable energy, which of the following scenarios would be most sustainable in the long term for a community seeking energy independence?
Flashcards
Non-Renewable Resource
Non-Renewable Resource
Resources that cannot be easily replaced naturally.
Respiratory System's Function
Respiratory System's Function
The system responsible for gas exchange, primarily oxygen and carbon dioxide.
Chemical Change
Chemical Change
A change involving the formation of new substances.
SI Unit of Force
SI Unit of Force
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The 'Red Planet'
The 'Red Planet'
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Water's Chemical Formula
Water's Chemical Formula
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Electrical Conductor
Electrical Conductor
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Photosynthesis
Photosynthesis
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Study Notes
- Coal is a non-renewable resource.
- The primary function of the human respiratory system is exchanging gases between the body and the environment.
- Rusting of iron is a chemical change.
- The SI unit of force is Newton.
- Mars is known as the "Red Planet."
- The chemical formula of water is Hâ‚‚O.
- Copper is a conductor of electricity.
- The process by which plants create their own food is photosynthesis.
- Solar energy is a renewable source of energy.
- The boiling point of water at sea level is 100°C.
- Acids turn blue litmus paper red.
- The main component of natural gas is methane.
- Oxygen is a non-metal.
- The chemical symbol for gold is Au.
- A function of the human skeletal system is protecting internal organs.
- Evaporation is the process by which a liquid turns into a gas.
- Metals are malleable.
- The chemical formula of methane is CHâ‚„.
- A function of the human digestive system is breaking down food.
- The SI unit of temperature is Kelvin.
- Carbon dioxide is a greenhouse gas.
- The chemical formula of sodium chloride is NaCl.
- Acids turn blue litmus paper red.
- Transpiration is the process by which plants lose water through their leaves.
- Coal is a non-renewable resource.
- The chemical symbol for sodium is Na.
- Bases feel slippery to the touch.
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