Science 8 Concept Review

Science

A comprehensive review covering digestive and excretory systems, photosynthesis, cellular respiration, genetics, and atomic structure.

Biology Chemistry Genetics

20 Questions Medium Ages 13+ Aug 31, 2026

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About this Study Set

This study set covers Science through 20 practice questions. A comprehensive review covering digestive and excretory systems, photosynthesis, cellular respiration, genetics, and atomic structure. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

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Browse all 20 questions from the Science 8 Concept Review study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 What is the correct sequence of the digestive process?

A Digestion, Ingestion, Absorption, Assimilation
B Ingestion, Digestion, Absorption, Assimilation
C Absorption, Ingestion, Digestion, Assimilation
D Assimilation, Digestion, Ingestion, Absorption

2 Which system is responsible for removing waste from the body?

A Digestive System
B Excretory System
C Respiratory System
D Circulatory System

3 Where do light-dependent reactions occur in a plant cell?

A Stroma
B Nucleus
C Thylakoid Membranes
D Mitochondria

4 What is the primary product of the Calvin cycle?

A Oxygen
B Glucose
C Carbon dioxide
D Water

5 What is the function of the xylem in plants?

A Transports food
B Transports water and minerals
C Produces energy
D Regulates temperature

6 What is the process of losing water vapor through plant stomata called?

A Guttation
B Respiration
C Transpiration
D Photosynthesis

7 Which type of cellular respiration produces a large amount of ATP using oxygen?

A Anaerobic
B Aerobic
C Fermentation
D Lactic Acid

8 Where does cellular respiration occur in plant and animal cells?

A Chloroplast
B Nucleus
C Ribosomes
D Mitochondria

9 What is a unit of heredity that controls a trait?

A Phenotype
B Gene
C Allele
D Chromosome

10 Which letter represents a dominant trait in a Punnett square?

A Lowercase
B Capital
C Italicized
D Bold

11 What is the physical appearance of an organism called?

A Genotype
B Phenotype
C Dominant
D Recessive

12 How many subatomic particles are commonly identified in an atom?

A One
B Two
C Three
D Four

13 Which subatomic particle has a negative charge?

A Proton
B Neutron
C Electron
D Nucleus

14 What does the atomic number (Z) represent?

A Number of neutrons
B Number of protons
C Number of electrons + protons
D Mass of the atom

15 How is the mass number (A) calculated?

A Protons - Neutrons
B Protons + Electrons
C Protons + Neutrons
D Electrons + Neutrons

16 In a neutral atom, the number of protons is equal to the number of what?

A Neutrons
B Electrons
C Nuclei
D Isotopes

17 What is the primary source of energy for photosynthesis?

A Glucose
B Sunlight
C ATP
D Oxygen

18 Which of the following is NOT part of the water cycle?

A Evaporation
B Condensation
C Precipitation
D Assimilation

19 What does anaerobic respiration produce in muscles during intense activity?

A Glucose
B Lactic Acid
C Oxygen
D Carbon Dioxide

20 Which kingdom is NOT listed in the six kingdoms of life?

A Animalia
B Plantae
C Fungi
D Virus

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