Chemistry Of Life Warm Up 2
Welcome to the Electronic Learning Environment of Life Science (biology). All living organisms use energy in some form. It is the transfer of energy from the sun to and through almost every organism on Earth. We are biologists seek to understand this flow of energy.
This warm up permits an unlimited number of attempts to aid you in building LEARNING and TEST-TAKING skills. As a bonus, each attempt will randomly generate new questions and answers.
Questions and Answers
- 1.
What phases are shown in the three images below?
- A.
Image 1 is gas, image 2 is liquid, and image 3 is solid.
- B.
Image 1 is liquid, image 2 is solid, and image 3 is gas.
- C.
Image 1 is solid, image 2 is gas, and image 3 is liquid.
- D.
Image 1 is gas, image 2 is solid, and image 3 is liquid.
Correct Answer
B. Image 1 is liquid, image 2 is solid, and image 3 is gas.Explanation
The correct answer is that Image 1 is liquid, Image 2 is solid, and Image 3 is gas. This is because in Image 1, the particles are close together but still able to move freely, indicating a liquid state. In Image 2, the particles are tightly packed and unable to move, suggesting a solid state. In Image 3, the particles are far apart and moving rapidly, indicating a gas state.Rate this question:
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- 2.
What is the phase of water when its temperature is 150°C?
- A.
Solid
- B.
Liquid
- C.
Gas
- D.
None of the above
Correct Answer
C. GasExplanation
At a temperature of 150°C, water is in the gas phase. This is because water boils and turns into steam at 100°C, and at 150°C, it is well above its boiling point. In the gas phase, water molecules have enough energy to overcome the intermolecular forces and move freely, resulting in a gaseous state. Therefore, the correct answer is gas.Rate this question:
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- 3.
An unopened bottle of water is taken out of the refrigerator and placed on a table. After a while, the bottle is covered with droplets of water. What phase change has occurred?
- A.
Melting
- B.
Freezing
- C.
Boiling
- D.
Condensation
Correct Answer
D. CondensationExplanation
When a bottle of water is taken out of the refrigerator and placed on a table, the temperature of the surrounding air is typically warmer than the temperature inside the refrigerator. As a result, the air around the bottle is unable to hold as much moisture as the colder air inside the bottle. This temperature difference causes the water vapor inside the bottle to condense into liquid water droplets on the surface of the bottle, leading to the formation of droplets. Therefore, the phase change that has occurred in this scenario is condensation.Rate this question:
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- 4.
Molten lava pours from a volcano in Hawaii. After a few hours, the liquid lava hardens into a shiny gray rock. Which phase change has taken place?
- A.
Melting
- B.
Freezing
- C.
Boiling
- D.
Condensation
Correct Answer
B. FreezingExplanation
The phase change that has taken place is freezing. This is because the molten lava, which is in a liquid state, has cooled down and solidified into a shiny gray rock. Freezing is the process in which a substance changes from a liquid to a solid state when its temperature decreases.Rate this question:
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- 5.
If I burn butane in air, water and carbon dioxide are produced.Which statement is true?
- A.
Water and carbon dioxide are the PRODUCTS
- B.
Water and carbon dioxide are the REACTANTS
- C.
Water and carbon dioxide are the REACTION
Correct Answer
A. Water and carbon dioxide are the PRODUCTSExplanation
When butane is burned in air, it undergoes a combustion reaction. In this reaction, butane combines with oxygen from the air to produce water and carbon dioxide. Therefore, water and carbon dioxide are the products of the combustion reaction.Rate this question:
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- 6.
Which of the following are odourless, colourless gases at ROOM TEMPERATURE?
- A.
Water, oxygen and carbon dioxide
- B.
Oxygen and carbon dioxide
- C.
Sulphur and oxygen
Correct Answer
B. Oxygen and carbon dioxideExplanation
Oxygen and carbon dioxide are odourless, colourless gases at room temperature. Oxygen is a vital component of air and is necessary for respiration, while carbon dioxide is a byproduct of respiration and is also present in the atmosphere. Both gases are essential for the survival of living organisms and are commonly found in the Earth's atmosphere.Rate this question:
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- 7.
If I burn butane in air, water and carbon dioxide are produced.Which statement is true?
- A.
Water and carbon dioxide are the PRODUCTS
- B.
Water and carbon dioxide are the REACTANTS
- C.
Water and carbon dioxide are the REACTION
Correct Answer
A. Water and carbon dioxide are the PRODUCTSExplanation
When butane is burned in air, it undergoes a chemical reaction called combustion. In this reaction, butane combines with oxygen from the air to produce water and carbon dioxide. Therefore, water and carbon dioxide are the products of the combustion reaction.Rate this question:
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- 8.
Which of the following are odourless, colourless gases at ROOM TEMPERATURE?
- A.
Water, oxygen and carbon dioxide
- B.
Oxygen and carbon dioxide
- C.
Sulphur and oxygen
Correct Answer
B. Oxygen and carbon dioxideExplanation
Oxygen and carbon dioxide are odourless, colourless gases at room temperature. Oxygen is a gas that is essential for respiration and is present in the air we breathe. It is odorless and colorless. Carbon dioxide is also a gas that is produced by the human body during respiration and is released into the atmosphere. It is also odorless and colorless.Rate this question:
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- 9.
If I burn butane in air, water and carbon dioxide are produced.Which statement is true?
- A.
Water and carbon dioxide are the PRODUCTS
- B.
Water and carbon dioxide are the REACTANTS
- C.
Water and carbon dioxide are the REACTION
Correct Answer
A. Water and carbon dioxide are the PRODUCTSExplanation
When butane is burned in air, it undergoes a combustion reaction. In this reaction, butane combines with oxygen from the air to produce water and carbon dioxide. Therefore, water and carbon dioxide are the products of the reaction, not the reactants or the reaction itself.Rate this question:
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- 10.
If I burn butane in air, water and carbon dioxide are produced.Which statement is true?
- A.
Water and carbon dioxide are the PRODUCTS
- B.
Water and carbon dioxide are the REACTANTS
- C.
Water and carbon dioxide are the REACTION
Correct Answer
A. Water and carbon dioxide are the PRODUCTSExplanation
When butane is burned in air, it undergoes a chemical reaction known as combustion. In this reaction, the butane reacts with oxygen from the air to produce water and carbon dioxide as the products. Therefore, the statement "Water and carbon dioxide are the PRODUCTS" is true.Rate this question:
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- 11.
Which of the following are odourless, colourless gases at ROOM TEMPERATURE?
- A.
Water, oxygen and carbon dioxide
- B.
Oxygen and carbon dioxide
- C.
Sulphur and oxygen
Correct Answer
B. Oxygen and carbon dioxideExplanation
Oxygen and carbon dioxide are odourless, colourless gases at room temperature. Oxygen is a diatomic molecule, consisting of two oxygen atoms, and is essential for respiration. Carbon dioxide is a compound composed of one carbon atom and two oxygen atoms and is a byproduct of respiration and combustion. Both gases are commonly found in the Earth's atmosphere and are important for various biological and environmental processes.Rate this question:
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- 12.
After you have enter a meal, your body changes the chemical energy bound in the the food into _____, _____, and _____ energy. (NOTE: Please choose three of the most correct answers from the list.)
- A.
Heat
- B.
Mechanical
- C.
Nuclear
- D.
Light
- E.
Sound
- F.
Potential
Correct Answer(s)
A. Heat
B. Mechanical
F. PotentialExplanation
When you consume a meal, your body undergoes the process of digestion and metabolism. During this process, the chemical energy present in the food is converted into different forms of energy. Heat energy is produced as a result of chemical reactions occurring in the body. Mechanical energy is generated through muscle contractions and movements. Potential energy is stored in various forms, such as in the form of ATP (adenosine triphosphate) molecules, which can be used for cellular processes.Rate this question:
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- 13.
It is not always apparent when we observe matter, all the atoms, ions, compounds, and molecules are in constant motion.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The statement is true because according to the kinetic theory of matter, all particles are in constant motion. This motion can be in the form of vibrations, rotations, or translations. Even though we cannot see this motion with our naked eye, it is happening at the microscopic level. The constant motion of particles is what gives matter its physical properties, such as temperature and pressure.Rate this question:
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- 14.
_____ energy must be added to the substance to cause a substance to change states. (NOTE: Please observe grammar rules.)
Correct Answer
ThermalExplanation
Thermal energy refers to the energy that is related to the temperature of a substance. When a substance changes states, such as from solid to liquid or from liquid to gas, energy needs to be added in the form of heat to cause this change. This added thermal energy increases the temperature of the substance, causing the particles to gain enough energy to overcome the forces holding them together in their current state. Therefore, thermal energy is required to cause a substance to change states.Rate this question:
- 15.
What is the name of the product from this chemical reaction that takes place in capillaries. + HOH yields .
- A.
Hydrochloric Acid
- B.
Boric Acid
- C.
Carbonic Acid
- D.
Hydroiodic Acid
- E.
Nitric Acid
Correct Answer
C. Carbonic AcidExplanation
The chemical reaction mentioned in the question is the combination of water (HOH) with a certain compound. Among the options provided, the only compound that, when combined with water, forms carbonic acid is "Carbonic Acid" itself. Therefore, the correct answer is "Carbonic Acid."Rate this question:
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- 16.
The energy your body needs is provided by the _____, _____, and _____ found in foods. (NOTE: Please select three of the most correct answers.)
- A.
Fats
- B.
Sugars
- C.
Proteins
- D.
Acids
- E.
Salts
- F.
Nucleic Acids
Correct Answer(s)
A. Fats
B. Sugars
C. ProteinsExplanation
The energy your body needs is provided by fats, sugars, and proteins found in foods. Fats are a concentrated source of energy, providing more than twice the amount of energy per gram compared to carbohydrates and proteins. Sugars, specifically simple sugars like glucose, are quickly broken down and converted into energy. Proteins, made up of amino acids, can also be broken down and used as an energy source when needed. Acids, salts, and nucleic acids do not directly provide energy to the body.Rate this question:
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- 17.
_____ energy is the minimum amount of energy required to start a chemical reaction. (NOTE: Please observe correct grammar rules.)
Correct Answer(s)
ActivationExplanation
Activation energy is the minimum amount of energy required to start a chemical reaction. It acts as a barrier that needs to be overcome for the reaction to proceed. This energy is needed to break the existing bonds in the reactant molecules and initiate the formation of new bonds in the product molecules. Without sufficient activation energy, the reaction will not occur, even if the reactants are present. Therefore, activation energy plays a crucial role in determining the rate at which a chemical reaction takes place.Rate this question:
- 18.
Metabolism is the term used to describe a few of the chemical reactions that occur in an organism.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Metabolism is not just a term used to describe a few chemical reactions, but rather it encompasses all the chemical processes that occur in an organism, including the conversion of food into energy, the synthesis of molecules, and the breakdown of waste products. Therefore, the statement that metabolism only describes a few chemical reactions is false.Rate this question:
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- 19.
_____ is a substance that changes the rate of a chemical reaction without being consumed or changed during the reaction. (NOTE: Please observe correct grammar rules.)
Correct Answer
CatalystExplanation
A catalyst is a substance that speeds up the rate of a chemical reaction without being consumed or changed during the reaction. It works by providing an alternative pathway with a lower activation energy for the reaction to occur. This allows the reaction to proceed more quickly, but the catalyst remains unchanged at the end of the reaction. It can be reused in multiple reactions, making it an efficient tool in various industrial processes.Rate this question:
- 20.
When a reactant loses one or more electrons, thus becoming more positive in charge is called a(n) _____ _____.
- A.
Oxidation Reaction
- B.
Activation Reaction
- C.
Catalyst Reaction
- D.
Reduction Reaction
- E.
Thermal Reaction
Correct Answer
A. Oxidation ReactionExplanation
When a reactant loses one or more electrons, it becomes more positive in charge. This process is known as oxidation. In an oxidation reaction, the reactant undergoes a chemical transformation by losing electrons, resulting in an increase in its positive charge. This reaction is commonly observed in many chemical reactions and is an essential part of various biological processes as well.Rate this question:
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- 21.
When a reactant gain one or more electrons, thus becoming more positive in charge is called a(n) _____ _____.
- A.
Oxidation Reaction
- B.
Activation Reaction
- C.
Catalyst Reaction
- D.
Reduction Reaction
- E.
Thermal Reaction
Correct Answer
D. Reduction ReactionExplanation
When a reactant gains one or more electrons, it becomes more negative in charge. This process is known as reduction reaction. In a reduction reaction, the reactant is reduced because it gains electrons, which leads to a decrease in its positive charge.Rate this question:
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- 22.
An enzyme is a _____ or _____ molecule that speeds up metabolic reaction without being permanently changed or destroyed. (NOTE: Please choose any two of the most correct answers.)
- A.
Protein
- B.
RNA
- C.
DNA
- D.
MRNA
- E.
TRNA
Correct Answer(s)
A. Protein
B. RNAExplanation
Enzymes are biological catalysts that speed up metabolic reactions in living organisms. They are typically composed of proteins, which provide the structural and functional components necessary for enzymatic activity. However, some enzymes can also be composed of RNA, known as ribozymes. These RNA molecules can catalyze specific reactions, demonstrating that enzymes can be either proteins or RNA molecules. Therefore, the correct answers for this question are protein and RNA.Rate this question:
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- 23.
A _____ maintains a fixed volume, but has the ability to take the shape of it's container.
- A.
Gas
- B.
Liquid
- C.
Solid
- D.
Plasma
- E.
Particles
Correct Answer
B. LiquidExplanation
A liquid maintains a fixed volume, but has the ability to take the shape of its container. Unlike solids, which have a fixed shape and volume, and gases, which can expand to fill the entire volume of their container, liquids have the ability to flow and adapt to the shape of their container while still maintaining a constant volume. This is due to the relatively weak forces of attraction between liquid particles, allowing them to move and slide past each other.Rate this question:
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- 24.
Gas particles have little or no attraction to each other, so they can fill the volume of the container they occupy.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Gas particles have little or no attraction to each other, which means they are not held together in a fixed arrangement. This allows them to move freely and spread out to occupy the entire volume of the container they are in. As a result, gases are highly compressible and can expand to fill any available space. Therefore, the statement is true.Rate this question:
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- 25.
A(n) _____ maintains a fixed volume and shape.
- A.
Gas
- B.
Liquid
- C.
Solid
- D.
Plasma
- E.
Products
Correct Answer
C. SolidExplanation
A solid maintains a fixed volume and shape because its particles are closely packed together and have strong intermolecular forces that prevent them from moving freely. This results in a rigid structure, giving solids a definite shape. The fixed volume is maintained because the particles are tightly packed and cannot be compressed easily.Rate this question:
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- 26.
Which of the following are odorless, colourless gases at ROOM TEMPERATURE?
- A.
Water, oxygen and carbon dioxide
- B.
Oxygen and carbon dioxide
- C.
Sulfur and oxygen
- D.
Carbon and fluorine
Correct Answer
B. Oxygen and carbon dioxideExplanation
Oxygen and carbon dioxide are odorless, colorless gases at room temperature. Water is a liquid at room temperature, not a gas. Sulfur is a yellow solid at room temperature, not a gas. Carbon is a solid and fluorine is a yellowish gas at room temperature, not odorless and colorless gases. Therefore, the correct answer is oxygen and carbon dioxide.Rate this question:
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Mar 17, 2023Quiz Edited by
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Feb 03, 2014Quiz Created by
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