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WorksheetsPHYSICAL SCIENCE Quiz
Total questions: 25
Worksheet time: 13mins
Amino acids are the building blocks of proteins. Each amino acid has a central carbon atom attached to a hydrogen atom, an amino group (NH2), a carboxyl group (COOH), and a variable side chain (R group). The side chain varies among different amino acids, giving each its unique properties. What makes an amino acid unique from one other?
The form of attachment
The different side chains
The manner of peptide bonding
The presence of acids and bases
What conditions must be met for a chemical reaction to occur?
Collision with proper orientation
Sufficient activation energy
Adding more reactant particles
Both collisions with proper orientation and sufficient energy
Pick two (2) options that will INCREASE the rate of reaction.
a. reducing heat
b. adding heat
c. adding a catalyst
d. removing catalyst
Which of the following gases are major components of a star?
a. carbon and oxygen
b. helium and carbon
c. hydrogen and carbon
d. hydrogen and helium
During star formation, heavier elements are synthesized through nuclear fusion processes in the cores of stars and during supernova explosions. Which of the following statements regarding the formation of heavier elements during star formation is TRUE?
a. The fusion of lighter elements into heavier ones occurs primarily during the red giant phase.
b. Heavier elements are primarily formed during the main sequence phase of a star's life.
c. Elements heavier than iron are exclusively produced in the cores of massive stars.
d. Elements heavier than iron are synthesized in supernova explosions.
The nuclear fusion process occurring in the core of our Sun involves hydrogen nuclei combining to form helium nuclei, releasing immense amounts of energy in the form of light and heat. Which of these is the nuclear fusion process?
a. Proton-Proton Chain
b. Carbon Cycle
c. Tri-Alpha Process
d. Calvin Cycle
Which element is the lightest and at the same time the most abundant in outer space?
a. helium
b. hydrogen
c. iron
d. lithium
Which of the following statements is INCORRECT?
a. Polar covalent bond can be present in a nonpolar molecule.
b. Polar bond forms when electrons are unequally shared by two atoms in a compound.
c. Polarity of bonds and molecular geometry are the two factors that affect the polarity of molecules.
d. Polar covalent bond is present if the electronegativity difference between atoms is equal to or less than 0.4.
Which of the following (intermolecular forces of attraction) IMFAs is considered the weakest?
a. Ion-dipole
b. H-bonding
c. Dipole-dipole
d. London Dispersion forces
Liquids can form spherical elastic film to minimize surface area. What intermolecular forces are responsible for the formation of this film in water?
a. dipole-induced dipole
b. H-bonding
c. ion-induced dipole
d. London dispersion forces
What is the name given to a catalyst in the human body?
a. Biology
b. Catalyst
c. Chemical
d. Enzyme
At higher altitudes with lower atmospheric pressure, the boiling point of water decreases. Given the statement that atmospheric pressure on top of a mountain is lower than at sea level, what will happen to the cooking time of an egg on top of the mountain?
a. The egg will cook faster since the boiling temperature will be lower.
b. The egg will cook at a shorter time since the boiling temperature will be higher.
c. The egg will cook for a longer time due to a lower boiling temperature.
d. The egg will cook at a shorter time due to the higher boiling temperature.
Carbon dioxide (CO2) is an example of a non-polar molecule due to its linear molecular geometry and symmetrical distribution of polar bonds, resulting in a net dipole moment of zero. Which of the following is the structure of a non-polar molecule?
a. Bent
b. Trigonal pyramidal
c. Linear
d. Trigonal planar
The boiling point of water is greater than dihydrogen sulfide (H2S). This is because of the presence of what type of intermolecular forces of attraction?
a. Ion-dipole
b. H-bonding
c. London dispersion
d. Dipole-dipole bond
Which of the following is NOT a function of lipids in living organisms?
a. Long-term energy storage
b. Structural component of cell membranes
c. Catalyst for biochemical reactions
d. Insulation and protection
At any certain time the shift in the position of the electrons in an atom will likely create temporary positive and negative poles. Which among the following is this kind of dipole?
a. dipole forces
b. dipole moment
c. dispersion forces
d. instantaneous dipole
Atom is the basic unit of a chemical element. What are the atoms that make up carbohydrates?
a. C and H
b. C, H and N
c. C, H, and O
d. C, H, O, and N
It deals with the process that involves the rearrangement of the molecular or ionic structure of a substance to form a new substance or product.
a. chemical equilibrium
b. chemical reaction
c. chemical symbol
d. stoichiometry
Which of the following is the correct sequence of a chemical equation?
a. Reactant → Product
b. Product → Reactant
c. Reactant + Product
d. Product + Reactant
Which of the following equations below is balanced?
a. Al+3O2→2Al2O3
b. 4Al+O2→2Al2O3
c. 4Al+3O2→Al2O3
d. 4Al+3O2→2Al2O3
Which of the following is TRUE about the boiling point of polar molecules?
a. Generally high boiling point
b. Generally low boiling point
c. The boiling point cannot be determined
d. Similar non-polar molecules
Which of the following pairs of atoms would form a nonpolar covalent bond?
a. P-N
b. C-S
c. Ca-O
d. Na-Cl
Which of the molecules below DOES NOT constitute a nucleic acid?
a. Amino acid
b. Nitrogenous base
c. Phosphate group
d. Sugar
What is the ability of a substance to be dissolved in another substance to form a solution?
a. boiling point
b. solubility
c. viscosity
d. vapor pressure
How is instantaneous dipole best described?
a. It arises from the high polarization of the atoms or molecules.
b. It is a permanent dipole induced by polar molecules to ions.
c. It is the strongest attractive force between and among molecules.
d. It results in the formation of temporary dipoles induced to atoms or molecules.
