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- Chemistry
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    - Acids & Bases 53
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  - Organic Chemistry
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  - Analytical Chemistry
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  - Nuclear Chemistry
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  - Polymer Chemistry
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  - Theoretical Chemistry
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    - Reaction Dynamics 81
    - Electronic Structure 100
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  - Medicinal Chemistry
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    - Enzyme Inhibition 5
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  - Green Chemistry
    - Sustainable Design 4
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  - Materials Chemistry
    - Crystal Structure 6
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    - Composites 8
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- Biology
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    - Cell Division 32
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  - Genetics
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  - Evolution
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    - Comparative Anatomy 12
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  - Ecology
    - Ecosystem 36
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    - Food Chains 16
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    - Ecological Energy Flow 5
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    - Biodiversity 28
    - Ecological Conservation 47
    - Habitat 5
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    - Ecological Adaptation 11
    - Human Impact 5
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  - Human Anatomy & Physiology
    - Skeletal System 116
    - Muscular System 69
    - Nervous System 124
    - Endocrine System 78
    - Circulatory System 90
    - Respiratory System 44
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    - Excretory System 10
    - Reproductive System 120
    - Immune System 11
    - Integumentary System 21
    - Sensory Organs 56
  - Botany Plant Biology
    - Plant Anatomy 38
    - Plant Morphology 5
    - Plant Physiology 69
    - Photosynthesis 53
    - Plant Reproduction 22
    - Plant Growth 5
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    - Plant Taxonomy 43
    - Plant Ecology 19
    - Plant Pathology 6
    - Economic Botany 5
    - Seed Biology 5
    - Plant Genetics 6
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  - Zoology Animal Biology
    - Classification 38
    - Porifera 6
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    - Platyhelminthes 5
    - Nematoda 6
    - Annelida 7
    - Arthropoda 12
    - Mollusca 5
    - Echinodermata 6
    - Chordata 5
    - Fish 76
    - Amphibians 10
    - Reptiles 14
    - Birds 5
    - Mammals 106
    - Anatomy 11
    - Physiology 31
    - Reproduction 26
    - Development 6
    - Behavior 63
  - Microbiology
    - Microbial Structure 5
    - Bacteriology 33
    - Virology 34
    - Mycology 16
    - Parasitology 59
    - Microbial Genetics 5
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    - Microbial Ecology 11
    - Pathogenic Microbiology 18
    - Microbial Biotechnology 5
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  - Biotechnology
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    - Bioinformatics 6
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  - Molecular Biology
    - Biological Biomolecules 8
    - Carbohydrates 6
    - Biochemical Lipids 9
    - Bio Proteins 5
    - Bio Enzymes 21
    - Bio Nucleic Acids 5
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    - Bio Minerals 6
    - Bio Metabolism 60
    - Cellular Respiration 22
    - Nitrogen Metabolism 5
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    - Signal Transduction 5
  - Immunology
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  - Developmental Biology
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- Earth & Space Science
  - Geology
    - Minerals 32
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- Astronomy
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Science Quizzes, Questions & Answers

Recent Science Quizzes

Identifying Acids, Bases, and Salts Using Indicators

Questions: 30 | Attempts: 11 | Last updated: Jun 22, 2026

Sample Question
What is an indicator?

A substance that changes color in the presence of acids or bases

A substance that produces heat when dissolved in water

A substance that neutralizes acids only

A substance that measures temperature

Identifying Acids, Bases, and Salts

Questions: 30 | Attempts: 11 | Last updated: Jun 22, 2026

Sample Question
What is an indicator?

A substance that changes color in the presence of acids or bases

A substance that produces heat when dissolved in water

A substance that neutralizes acids only

A substance that measures temperature

Science 7 Ecosystems and Biodiversity

Questions: 8 | Attempts: 12 | Last updated: Jun 22, 2026

Sample Question
A scientist observes that removing one species from an ecosystem causes several other species to decline. Which concept BEST explains why ecosystems with more species are better able to withstand such disturbances?

Ecological footprint

Biodiversity

Succession

Sustainability

Plants for Food and Fibre Unit B

Questions: 8 | Attempts: 11 | Last updated: Jun 22, 2026

Sample Question
A plant in the desert has thick stems and sharp spikes. Which TWO functions do these adaptations serve?

Thick stems store water; spikes protect the water supply

Thick stems perform photosynthesis; spikes attract pollinators

Thick stems anchor the plant; spikes absorb nutrients

Thick stems release oxygen; spikes prevent transpiration

Gravitation, Solar System & Space Exploration

Questions: 30 | Attempts: 11 | Last updated: Jun 20, 2026

Sample Question
What is gravitation?

A force of repulsion between two objects

A force of attraction between two objects with mass

A force that only acts on planets

A magnetic force between metals

Water Cycle, Atoms, Elements & Chemical Compounds

Questions: 25 | Attempts: 12 | Last updated: Jun 18, 2026

Sample Question
Which process describes the conversion of liquid water into water vapor at the surface of oceans, lakes, and rivers?

Transpiration

Condensation

Evaporation

Precipitation

Earth Science: Water Cycle, Atoms, Elements & Compounds

Questions: 30 | Attempts: 11 | Last updated: Jun 18, 2026

Sample Question
Which process describes the conversion of liquid water into water vapor at the surface of a water body?

Transpiration

Condensation

Evaporation

Precipitation

Chemistry, Physics, Biology & Astronomy Quiz

Questions: 30 | Attempts: 11 | Last updated: Jun 17, 2026

Sample Question
Where are protons and neutrons located in an atom?

In the outer rings

In the nucleus

In the electron shells

In the valence shell

Advanced Science Final Exam Review

Questions: 30 | Attempts: 12 | Last updated: Jun 17, 2026

Sample Question
What is a producer, and why is it important in an ecosystem?

An organism that eats other organisms; it is at the top of the food chain

An organism that makes its own food using photosynthesis; it is the base of food chains

An organism that breaks down dead matter; it recycles nutrients

An organism that consumes both plants and animals; it balances the ecosystem

SNC2D1 Final Exam Biology & Science Review

Questions: 30 | Attempts: 12 | Last updated: Jun 17, 2026

Sample Question
Which of the following correctly represents the levels of organization from simplest to most complex?

Organ → Cell → Tissue → Organ System → Organism

Cell → Tissue → Organ → Organ System → Organism

Tissue → Cell → Organ → Organism → Organ System

Cell → Organ → Tissue → Organ System → Organism

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