Science Flashcards
What phase of metter can be compressed easily and lacks a fixed size or forms.
Gas
What property of gas results from the force generated when gas particles collide with the walls of the container?
Pressure
What is the typical motion of gas molecules inside a container?
Straight line Motion
At constant temperature, what happens to the volume of a gas when the pressure increases?
Decreases
In the Charle’s Law, what is the relationship between volume and temperature?
Directly Proportional
What change occurs to the temperature of a gas if its volume decreases at constant pressure?
Decreases
Which of the following explains Boyle’s Law?
If the pressure of a gas is constant, its volume is directly proportional to its temperature.
If the temperature of a gas is constant, its volume is directly proportional to its pressure.
If the pressure of a gas is constant, its volume is inversely proportional to its temperature.
If the pressure of a gas is constant, its volume is inversely proportional to its temperature.
Which statement accurately represents Charles’ Law?
If the pressure of a gas is constant, its volume is directly proportional to its temperature.
If the temperature of a gas is constant, its volume is directly proportional to its pressure.
If the temperature of a gas is constant, its volume is inversely proportional to its pressure.
If the pressure of a gas is constant, its volume is inversely proportional to its temperature.
If the pressure of a gas is constant, its volume is directly proportional to its temperature.
The mathematical expression that is applied in solving problems related to Charles Law?
V1T1=V2T2
What is the most likely outcome when a closed vessel filled with gas is shaken for 2 minutes?
The pressure inside the vessel increases.
The temperature and pressure inside the vessel increase.
The temperature inside the vessel increases.
Both the temperature and pressure in the vessel increase.
The temperature and pressure inside the vessel increase.
Both the temperature and pressure in the vessel increase.
Why is it necessary to balance a chemical equation?
✓ To ensure conservation of mass.
A balloon with a volume of 200 mL at 30°C is submerged in hot water to obtain a temperature of 50°C. Find out what will happen to the volume of the balloon provided the pressure remains the same.
The volume of the balloon will become higher than 200 mL.
What is/are the composition of the nucleotides of the Nucleic Acids?
Sugar, Nitrogenous base, and Phosphate group
What is the most abundant organic molecules in living systems, and it is composed of carbon, hydrogen, oxygen. nitrogen and sulfur (CHONS)?
Proteins
What type of polysaccharide cannot be digested (broken down) by humans?
Cellulose
What are the macromolecules that are key in the continuity of life?
Nucleic Acids
What is the sugar found in RNA?
Ribose
During class, a student has been feeling drowsy and distracted. What dietary choices should the student make to improve their alertness and focus?
Consuming foods rich in complex carbohydrates like whole grains and vgetables can provide a steady source of energy to fuel the brain and maintain concentration throughout the day.
Consider the following pairs of biomolecules and their functions. Which pair is correctly matched?
Lipids: Energy storage and insulation
Proteins: Providing quick energy and serving as genetic material
Nucleic acids: Catalyzing chemical reactions and supporting cell structure
Carbohydrates: Forming cell membranes and regulating body temperature
Lipids: Energy storage and insulation
What type of fatty acids are composed of single bonds?
Saturated
How many amino acids of the same kinds of different arrangement are there?
20
What is the function of carbohydrates?
Energy Storage
What does the arrow (→) in a chemical equation represent?
Yields
What is/are the substance(s) that are produced in a chemical reaction?
Products
What type of chemical reaction can be represented by the equation:
AB + CD = AC +BD?
Double Displacement
What type of chemical reaction is described where two substances combine to form one product?
Combination
What are the products of an acid-base reaction?
Salt and Water
What do you call substances that are used up in chemical reaction?
Reactants
What kinetic energy is needed to start a chemical reaction?
Activation Energy
What substance slows down or retards a chemical reaction?
Inhibitor
What does a catalyst do to a chemical reaction?
Speeds up the rate of reaction.
How is a chemical equation be balanced?
Adding Coefficients
What is the effect of a catalyst on the activation energy?
It increases the activation energy.
Fresh fish and meat that are not stored in a refrigerator show signs of spoilage in less than a day. Which caused this spoilage?
Oxygen in air
Presence of microorganisms
Temperature changes
All of the above
All of the above
What gases are primarily responsible for causing acid rain?
Sulfur Dioxide and Nitrogen Oxides
The rate of reaction increases as the temperature increases. Which of the following statements provides the best explanation for this?
Higher temperature has higher activation energy.
At lower temperatures the particles do not collide with each other.
Increasing the temperature increases the number of particles, so they collide more often.
At higher temperatures the particles have more move faster, and collide more often.
At higher temperatures the particles have more move faster, and collide more often.
Which of the following statements about collision is correct?
Only fast-moving particles collide with each other.
All colliding particles have the same amount of energy.
Reaction will occur even without collision of molecules.
Reactions can happen if the colliding particles have enough energy.
Reactions can happen if the colliding particles have enough energy.
Which source of gas emissions is least likely to be a significant factor in the production of acid rain?
Vehicles
Power plants
Backyard farming
Coal mining industries
Backyard Farming
Reactions eventually stop. What is generally the reason for this?
The particles have run out of energy.
Imagine you accidentally leave an aerosol can near a heat source. What is the most likely consequence?
The can will eventually explode
What is the essential organic molecule involved in the maintenance and metabolic processes of living organisms?
Biomolecule
What is the primary source of energy for the body?
Carbohydrates
What is the monomer of proteins?
Amino Acids
What law is the basis for balancing chemical equations?
Law of Conservation of mass
Group of biomolecules that is insoluble
Lipids
According to Boyle’s Law. what is the relationship between pressure and volume?
Inversely Proportional
