International Junior Science Olympiad (IJSO)
Basic science practice questions covering physics, chemistry, biology, and earth science concepts suitable for junior science Olympiad preparation.
Questions
Which of the following is not a branch of science?
- Physics
- Chemistry
- Biology
- Mathematics
What is the SI unit of mass?
- Kilogram
- Gram
- Pound
- Ounce
What is the chemical formula for water?
- H2O
- CO2
- NaCl
- CH4
What is the largest planet in our solar system?
- Jupiter
- Saturn
- Uranus
- Neptune
What is the process by which plants convert sunlight into energy?
- Photosynthesis
- Cellular respiration
- Fermentation
- Glycolysis
What is the name of the force that attracts objects to each other?
- Gravity
- Electromagnetism
- Strong nuclear force
- Weak nuclear force
What is the name of the smallest particle of an element that can exist?
- Atom
- Molecule
- Electron
- Neutron
What is the name of the process by which rocks are broken down into smaller pieces?
- Weathering
- Erosion
- Deposition
- Compaction
What is the name of the process by which water moves from the Earth's surface to the atmosphere?
- Evaporation
- Condensation
- Precipitation
- Transpiration
What is the name of the process by which animals take in oxygen and release carbon dioxide?
- Respiration
- Photosynthesis
- Cellular respiration
- Fermentation
What is the name of the organ that pumps blood throughout the body?
- Heart
- Lungs
- Brain
- Stomach
What is the name of the process by which plants reproduce?
- Pollination
- Fertilization
- Germination
- Growth
What is the name of the process by which animals reproduce?
- Mating
- Fertilization
- Gestation
- Birth
What is the name of the process by which rocks are formed?
- Weathering
- Erosion
- Deposition
- Compaction
What is the name of the process by which fossils are formed?
- Petrification
- Carbonization
- Mummification
- Permineralization