Fun Science Challenge for Grade 8

What is the chemical symbol for water?

• H2O

• H2O3

• O2H

• H2O2

What planet is known as the Red Planet?

• Venus

• Jupiter

• Mars

• Saturn

What gas do plants absorb from the atmosphere?

• Carbon dioxide

• Oxygen

• Hydrogen

• Nitrogen

What is the process by which plants make their food?

• Transpiration

• Respiration

• Digestion

• Photosynthesis

What is the largest organ in the human body?

• Skin

• Heart

• Liver

• Lungs

What is the speed of light in a vacuum?

• 300,000,000 meters per second

• 299,792,458 meters per second

• 299,792 kilometers per second

• 150,000,000 meters per second

What is the main function of red blood cells?

• To transport oxygen and carbon dioxide.

• To regulate body temperature

• To fight infections

• To produce insulin

What is the powerhouse of the cell?

• Mitochondria

• Chloroplast

• Nucleus

• Ribosome

What is the force that pulls objects toward the Earth?

• Magnetism

• Gravity

• Friction

• Electromagnetism

What is the basic unit of life?

• Tissue

• Organism

• Cell

• Atom