Science Review Quiz: Biology and Chemistry

Science

A collection of review questions covering biological evolution, heredity, and fundamental chemical reactions including balancing equations.

Biology Chemistry Education

12 Questions Medium Ages 14+ Sep 2, 2026

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About this Study Set

This study set covers Science through 12 practice questions. A collection of review questions covering biological evolution, heredity, and fundamental chemical reactions including balancing equations. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

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1 What concept explains how population separation by a river contributes to evolution?

A Heredity
B Isolation
C Selection
D Variation

2 Which evidence provides preserved remains of past organisms?

A Biography
B Comparative morphology
C Embryology
D Fossils

3 Why is variation important in evolution?

A It makes organisms identical
B It causes identical traits
C It prevents adaptation
D It helps organisms survive and reproduce

4 What is the term for differences in traits among individuals of the same species?

A Adaptation
B Heredity
C Isolation
D Variation

5 Which term refers to the passing of traits from parents to offspring?

A Heredity
B Isolation
C Selection
D Variation

6 What does vigorous bubbling in a chemical reaction indicate?

A A gas is being produced
B The liquid is boiling
C The mixture is freezing
D Water is evaporating

7 Why is the breakdown of limestone (CaCO3) into CaO and CO2 a decomposition reaction?

A One compound breaks into simpler substances
B One element replaces another
C Two compounds exchange ions
D Two substances combine

8 What type of reaction is Zn + CuSO4 -> ZnSO4 + Cu?

A Combination
B Decomposition
C Double replacement
D Single replacement

9 Which classification of reaction is incorrect?

A 2H2 + O2 -> 2H2O (Combination)
B 2KClO3 -> 2KCl + 3O2 (Decomposition)
C Fe + CuSO4 -> FeSO4 + Cu (Double Replacement)
D AgNO3 + NaCl -> AgCl + NaNO3 (Double Replacement)

10 What is the correct chemical equation for hydrogen gas reacting with oxygen to produce water?

A H + O -> H2O
B H2 + O2 -> H2O
C H2 + O -> H2O2
D H2O -> H2 + O

11 How should the equation Fe + O2 -> Fe2O3 be balanced?

A Fe + O2 -> Fe2O3
B 2Fe + O2 -> Fe2O3
C 4Fe + 3O2 -> 2Fe2O3
D Fe + 3O2 -> 2Fe2O3

12 What happens to atoms during a chemical reaction?

A Atoms are destroyed
B Atoms disappear
C Atoms change into different elements
D Atoms are rearranged

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