, PLEASE USE THIS DOCUMENT AS A GUIDE ONLY
QUESTION 1
1. Answer the following questions by choosing the correct option:
1.1. B (Scientific knowledge can change with new evidence)
1.2. D (All of the above)
1.3. D (cells)
1.4. A (observation)
1.5. C (thinking)
1.6. C (homework)
1.7. A (electrons, neutrons, protons)
1.8. C (cell membrane)
1.9. D (inquisitive assessment)
1.10. C (chloroplast)
QUESTION 2
2.1 Match the concepts in column A with the explanations in column B.
2.1.1 C (Elements - a substance made from one type of atom that cannot be decomposed into simpler
substances)
2.1.2 D (Molecule - a group of two or more atoms chemically bonded together)
2.1.3 E (Hydrogen - a clean alternative to methane; the most abundant chemical element)
2.1.4 B (Compound - a substance that can be broken down into two or more other substances by the
addition of energy)
2.1.5 A (Atom - the smallest unit of matter that retains the properties of an element)
2.2 Define the following terms in your own words:
2.2.1 Protons
Protons are subatomic particles found in the nucleus of an atom that carry a positive electrical charge
(Tutorial 501, p. 11; Study Guide, p. 13).
2.2.2 Electrons
Electrons are subatomic particles that carry a negative electrical charge and orbit the nucleus in
electron shells or orbitals; they can also be regarded as units of energy (Tutorial 501, p. 11; Study
Guide, p. 13).
2.2.3 Neutrons
Neutrons are subatomic particles located in the nucleus of an atom that have no electrical charge,
meaning they are neutral (Tutorial 501, p. 11; Study Guide, p. 13).
2.2.4 Covalent bond
A covalent bond is a type of chemical bond formed when two atoms share electrons from their outer
electron shells, such as when two hydrogen atoms share their electrons to form H₂ gas (Tutorial 501,
p. 14; Study Guide, p. 16).
QUESTION 1
1. Answer the following questions by choosing the correct option:
1.1. B (Scientific knowledge can change with new evidence)
1.2. D (All of the above)
1.3. D (cells)
1.4. A (observation)
1.5. C (thinking)
1.6. C (homework)
1.7. A (electrons, neutrons, protons)
1.8. C (cell membrane)
1.9. D (inquisitive assessment)
1.10. C (chloroplast)
QUESTION 2
2.1 Match the concepts in column A with the explanations in column B.
2.1.1 C (Elements - a substance made from one type of atom that cannot be decomposed into simpler
substances)
2.1.2 D (Molecule - a group of two or more atoms chemically bonded together)
2.1.3 E (Hydrogen - a clean alternative to methane; the most abundant chemical element)
2.1.4 B (Compound - a substance that can be broken down into two or more other substances by the
addition of energy)
2.1.5 A (Atom - the smallest unit of matter that retains the properties of an element)
2.2 Define the following terms in your own words:
2.2.1 Protons
Protons are subatomic particles found in the nucleus of an atom that carry a positive electrical charge
(Tutorial 501, p. 11; Study Guide, p. 13).
2.2.2 Electrons
Electrons are subatomic particles that carry a negative electrical charge and orbit the nucleus in
electron shells or orbitals; they can also be regarded as units of energy (Tutorial 501, p. 11; Study
Guide, p. 13).
2.2.3 Neutrons
Neutrons are subatomic particles located in the nucleus of an atom that have no electrical charge,
meaning they are neutral (Tutorial 501, p. 11; Study Guide, p. 13).
2.2.4 Covalent bond
A covalent bond is a type of chemical bond formed when two atoms share electrons from their outer
electron shells, such as when two hydrogen atoms share their electrons to form H₂ gas (Tutorial 501,
p. 14; Study Guide, p. 16).
