International Junior Science Olympiad (IJSO)

Description: The International Junior Science Olympiad (IJSO) is an annual competition for students aged 15 or younger. The competition is held in a different country each year, and it typically attracts over 300 students from more than 60 countries. The IJSO is a team competition, and each team consists of four students. The students compete in three rounds: a theory round, an experimental round, and a field study round. The theory round consists of a written exam that covers topics in physics, chemistry, and biology. The experimental round consists of a laboratory experiment that the students must complete in a limited amount of time. The field study round consists of a project that the students must complete in a natural setting.
Number of Questions: 15
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Tags: ijso science olympiad physics chemistry biology
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Which of the following is not a branch of science?

  1. Physics

  2. Chemistry

  3. Biology

  4. Mathematics


Correct Option: D
Explanation:

Mathematics is a branch of mathematics, not a branch of science.

What is the SI unit of mass?

  1. Kilogram

  2. Gram

  3. Pound

  4. Ounce


Correct Option: A
Explanation:

The SI unit of mass is the kilogram.

What is the chemical formula for water?

  1. H2O

  2. CO2

  3. NaCl

  4. CH4


Correct Option: A
Explanation:

The chemical formula for water is H2O.

What is the largest planet in our solar system?

  1. Jupiter

  2. Saturn

  3. Uranus

  4. Neptune


Correct Option: A
Explanation:

Jupiter is the largest planet in our solar system.

What is the process by which plants convert sunlight into energy?

  1. Photosynthesis

  2. Cellular respiration

  3. Fermentation

  4. Glycolysis


Correct Option: A
Explanation:

Photosynthesis is the process by which plants convert sunlight into energy.

What is the name of the force that attracts objects to each other?

  1. Gravity

  2. Electromagnetism

  3. Strong nuclear force

  4. Weak nuclear force


Correct Option: A
Explanation:

Gravity is the name of the force that attracts objects to each other.

What is the name of the smallest particle of an element that can exist?

  1. Atom

  2. Molecule

  3. Electron

  4. Neutron


Correct Option: A
Explanation:

An atom is the smallest particle of an element that can exist.

What is the name of the process by which rocks are broken down into smaller pieces?

  1. Weathering

  2. Erosion

  3. Deposition

  4. Compaction


Correct Option: A
Explanation:

Weathering is the name of the process by which rocks are broken down into smaller pieces.

What is the name of the process by which water moves from the Earth's surface to the atmosphere?

  1. Evaporation

  2. Condensation

  3. Precipitation

  4. Transpiration


Correct Option: A
Explanation:

Evaporation is the name of the process by which water moves from the Earth's surface to the atmosphere.

What is the name of the process by which animals take in oxygen and release carbon dioxide?

  1. Respiration

  2. Photosynthesis

  3. Cellular respiration

  4. Fermentation


Correct Option: A
Explanation:

Respiration is the name of the process by which animals take in oxygen and release carbon dioxide.

What is the name of the organ that pumps blood throughout the body?

  1. Heart

  2. Lungs

  3. Brain

  4. Stomach


Correct Option: A
Explanation:

The heart is the name of the organ that pumps blood throughout the body.

What is the name of the process by which plants reproduce?

  1. Pollination

  2. Fertilization

  3. Germination

  4. Growth


Correct Option: A
Explanation:

Pollination is the name of the process by which plants reproduce.

What is the name of the process by which animals reproduce?

  1. Mating

  2. Fertilization

  3. Gestation

  4. Birth


Correct Option: A
Explanation:

Mating is the name of the process by which animals reproduce.

What is the name of the process by which rocks are formed?

  1. Weathering

  2. Erosion

  3. Deposition

  4. Compaction


Correct Option: D
Explanation:

Compaction is the name of the process by which rocks are formed.

What is the name of the process by which fossils are formed?

  1. Petrification

  2. Carbonization

  3. Mummification

  4. Permineralization


Correct Option: A
Explanation:

Petrification is the name of the process by which fossils are formed.

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