Challenging Science Concepts

What is the chemical formula for water?

• H2O2

• CO2

• H2O

• NaCl

What is the powerhouse of the cell?

• Ribosome

• Nucleus

• Mitochondria

• Endoplasmic Reticulum

What is the speed of light in a vacuum?

• 299,792 kilometers per second

• 300,000,000 meters per second

• 150,000,000 meters per second

• 299,792,458 meters per second

What is the process by which plants make their food?

• Respiration

• Digestion

• Transpiration

• Photosynthesis

What is the most abundant gas in the Earth's atmosphere?

• Oxygen

• Nitrogen

• Carbon Dioxide

• Argon

What is the pH level of pure water?

• 7

• 8

• 6

• 5

What is the main function of red blood cells?

• To transport oxygen and carbon dioxide.

• To produce insulin for the body.

• To regulate body temperature.

• To fight infections and diseases.

What is the theory of evolution primarily based on?

• Natural selection and genetic variation

• Species extinction and habitat loss

• Environmental adaptation and climate change

• Intelligent design and divine intervention

What is the unit of force in the International System of Units?

• pascal (Pa)

• watt (W)

• joule (J)

• newton (N)

What is the primary component of the sun?

• Carbon

• Helium

• Oxygen

• Hydrogen