DISC NATURAL SCIENCE EXAM
QUESTIONS WITH CORRECT ANSWERS
The discovery of the nucleus of the atom was achieved in the early twentieth century by
- ANSWER-Ernest Rutherford
Orange has a lower pH than milk. Therefore, - ANSWER-Orange juice is more acidic
than milk.
The process of turning solid carbon dioxide directly into gas is known: - ANSWER-
Sublimation
All elements with an atomic number (Z) higher than 83 are naturally radioactive. -
ANSWER-TRUE
An example a covalent bond can be found in: - ANSWER-Water, H2O
Compared to gasses, - ANSWER-The molecules in a liquid move more slowly.
The fact that a certain element, for example sodium, always combines in the same ratio
with a certain other element, for example chlorine, is dependent on sodium's and
chlorine's: - ANSWER-Number of valence electrons
Most polymers are characterized as: - ANSWER-A collection of small molecules
combined into long chains
Chemical bonds are: - ANSWER-ALL OF THE ABOVE
Which of the following common household products is an acid? - ANSWER-Vinegar
Hydrogen chloride (HCl) is a polar covalent molecule in which there is a slight positive
charge on the chlorine atom and a slight negative charge on the hydrogen atom. -
ANSWER-FALSE
The reaction below corresponds to gamma decay: - ANSWER-FALSE
Which of the following is responsible for binding the nucleus of an atom together despite
electrical repulsion between the protons? - ANSWER-Strong nuclear force
Which of the following statements is a characteristic of radioactivity? - ANSWER-An
element that undergoes decay may become a different element
The term "half-life" refers to - ANSWER-The time it takes for half the nuclei in a sample
to decay
QUESTIONS WITH CORRECT ANSWERS
The discovery of the nucleus of the atom was achieved in the early twentieth century by
- ANSWER-Ernest Rutherford
Orange has a lower pH than milk. Therefore, - ANSWER-Orange juice is more acidic
than milk.
The process of turning solid carbon dioxide directly into gas is known: - ANSWER-
Sublimation
All elements with an atomic number (Z) higher than 83 are naturally radioactive. -
ANSWER-TRUE
An example a covalent bond can be found in: - ANSWER-Water, H2O
Compared to gasses, - ANSWER-The molecules in a liquid move more slowly.
The fact that a certain element, for example sodium, always combines in the same ratio
with a certain other element, for example chlorine, is dependent on sodium's and
chlorine's: - ANSWER-Number of valence electrons
Most polymers are characterized as: - ANSWER-A collection of small molecules
combined into long chains
Chemical bonds are: - ANSWER-ALL OF THE ABOVE
Which of the following common household products is an acid? - ANSWER-Vinegar
Hydrogen chloride (HCl) is a polar covalent molecule in which there is a slight positive
charge on the chlorine atom and a slight negative charge on the hydrogen atom. -
ANSWER-FALSE
The reaction below corresponds to gamma decay: - ANSWER-FALSE
Which of the following is responsible for binding the nucleus of an atom together despite
electrical repulsion between the protons? - ANSWER-Strong nuclear force
Which of the following statements is a characteristic of radioactivity? - ANSWER-An
element that undergoes decay may become a different element
The term "half-life" refers to - ANSWER-The time it takes for half the nuclei in a sample
to decay
