Grade 8 Biology Questions and Answers
A free sample of Grade 8 Biology practice questions with the correct answer and an explanation, following the Lebanese curriculum. Useful for revision before school tests.
أسئلة علوم الحياة للصف 8 مع الأجوبة والشرح وفق المنهج اللبناني.
How to use this page: read each question, try to answer it yourself, then open the answer to check your reasoning. Questions are grouped by the chapter they belong to on EduRise, in the order of the Lebanese Grade 8 Biology programme.
15 Grade 8 Biology practice questions
Chapter: Blood and Biological Self · easy
1. What is the meaning of "antigen"?
- A. antigen D of red blood cells; present in Rh+ people, absent in Rh− people
- B. a non-self molecule recognised by the immune system
- C. the red protein of red blood cells that binds oxygen
- D. a blood cell without a nucleus that contains haemoglobin and carries oxygen
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Answer: a non-self molecule recognised by the immune system
Explanation: Antigen: a non-self molecule recognised by the immune system
Chapter: Blood and Biological Self · easy
2. Which term matches this definition: "giving blood from a compatible donor to a recipient"?
- A. haemoglobin
- B. transfusion
- C. red blood cell
- D. white blood cell
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Answer: transfusion
Explanation: Transfusion: giving blood from a compatible donor to a recipient
Chapter: The Non-Specific Immune Response · easy
3. Which term matches this definition: "the organ behind the breastbone where T lymphocytes mature"?
- A. fever
- B. lysosome
- C. phagocyte
- D. thymus
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Answer: thymus
Explanation: Thymus: the organ behind the breastbone where T lymphocytes mature
Chapter: The Non-Specific Immune Response · easy
4. What is the meaning of "thymus"?
- A. the movement of phagocytes towards chemical signals released at the site of infection
- B. a group of plasma proteins that perforate bacteria and help phagocytosis
- C. the organ behind the breastbone where T lymphocytes mature
- D. a microbe (bacterium, virus, fungus, parasite) that causes disease
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Answer: the organ behind the breastbone where T lymphocytes mature
Explanation: Thymus: the organ behind the breastbone where T lymphocytes mature
Chapter: The Specific Immune Response · easy
5. Which term matches this definition: "a protein released by cytotoxic T cells that makes holes in the membrane of the target cell"?
- A. antibody
- B. immunoglobulin
- C. primary response
- D. perforin
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Answer: perforin
Explanation: Perforin: a protein released by cytotoxic T cells that makes holes in the membrane of the target cell
Chapter: The Specific Immune Response · easy
6. Which cells carry out the specific immune response?
- A. platelets
- B. red blood cells
- C. lymphocytes
- D. neutrophils
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Answer: lymphocytes
Explanation: B and T lymphocytes recognise antigens specifically.
Chapter: Activation and Disorders of the Immune System · easy
7. Which term matches this definition: "a weakening or absence of the immune defences, innate or acquired"?
- A. passive immunity
- B. mast cell
- C. immunodeficiency
- D. active immunity
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Answer: immunodeficiency
Explanation: Immunodeficiency: a weakening or absence of the immune defences, innate or acquired
Chapter: Activation and Disorders of the Immune System · easy
8. Which term matches this definition: "a massive generalised allergic reaction with a drop of blood pressure that can be fatal"?
- A. allergy
- B. anaphylactic shock
- C. IgE
- D. toxoid
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Answer: anaphylactic shock
Explanation: Anaphylactic shock: a massive generalised allergic reaction with a drop of blood pressure that can be fatal
Chapter: Antisepsis, Asepsis, Chemotherapy and Antibiotherapy · easy
9. What is the meaning of "antibiotherapy"?
- A. describes an antibiotic that only stops bacteria from multiplying
- B. a resistant resting form of some bacteria that can survive boiling
- C. a drug that blocks the multiplication of a virus
- D. the treatment of a bacterial infection with antibiotics
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Answer: the treatment of a bacterial infection with antibiotics
Explanation: Antibiotherapy: the treatment of a bacterial infection with antibiotics
Chapter: Antisepsis, Asepsis, Chemotherapy and Antibiotherapy · easy
10. Which term matches this definition: "the set of measures that prevent a disease before it appears"?
- A. prophylaxis
- B. antibiotic resistance
- C. antisepsis
- D. antiseptic
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Answer: prophylaxis
Explanation: Prophylaxis: the set of measures that prevent a disease before it appears
Chapter: Geology: Rock Deposits and the Use of Rocks by Man · easy
11. What does geology study?
- A. the stars and planets
- B. the Earth, its rocks and their history
- C. the weather and the clouds
- D. living cells and their organelles
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Answer: the Earth, its rocks and their history
Explanation: Geology is the science of the Earth and its rocks.
Chapter: Geology: Rock Deposits and the Use of Rocks by Man · easy
12. What is the meaning of "porosity"?
- A. an open-air site where rocks are extracted for building or industry
- B. the rule that sediments are deposited in horizontal layers
- C. the ability of a rock to hold water in the small spaces between its grains
- D. a rock formed by the cooling and solidification of magma, such as granite or basalt
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Answer: the ability of a rock to hold water in the small spaces between its grains
Explanation: Porosity: the ability of a rock to hold water in the small spaces between its grains
Chapter: Rock Deformations: Faults and Folds · easy
13. What is the meaning of "foliation"?
- A. a fault along which the blocks slide horizontally past each other
- B. the arrangement of minerals in parallel sheets in a metamorphic rock
- C. the tendency of a rock to break when a force acts on it
- D. the ability of a rock to bend and flow slowly without breaking
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Answer: the arrangement of minerals in parallel sheets in a metamorphic rock
Explanation: Foliation: the arrangement of minerals in parallel sheets in a metamorphic rock
Chapter: Rock Deformations: Faults and Folds · easy
14. Which term matches this definition: "the surface of rupture along which the blocks slide"?
- A. fault
- B. fault plane
- C. limb of a fold
- D. throw
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Answer: fault plane
Explanation: Fault plane: the surface of rupture along which the blocks slide
Chapter: Dynamics of the Terrestrial Globe: Lithospheric Plates · easy
15. Which term matches this definition: "an underwater volcanic mountain chain where plates diverge and new oceanic crust is made"?
- A. continental collision
- B. oceanic ridge
- C. convergent boundary
- D. lithospheric plate
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Answer: oceanic ridge
Explanation: Oceanic ridge: an underwater volcanic mountain chain where plates diverge and new oceanic crust is made
More practice
These are sample questions only. The full Grade 8 Biology course on EduRise includes every chapter, lessons, 1,144 questions and timed exams.
Biology questions in other grades
Other Grade 8 subjects
See also: Grade 8 Biology chapters · All question pages · Study guides
About these questions
Where do these Grade 8 Biology questions come from?
They are a sample from EduRise's Grade 8 Biology question bank (1,144 questions across 11 chapters), written to follow the Lebanese curriculum. Each chapter on EduRise has its own practice set and a timed exam.
Are the answers explained?
Yes. Every question on EduRise shows the correct answer and an explanation after you answer, in practice mode and in the exam review.
How do I get the full question bank?
Register at edurise.me and subscribe ($10/month) to practise every chapter of Grade 8 Biology, take the timed exams and track your progress.
Practise all Grade 8 Biology questions
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