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WorksheetsFun Science Challenge for Grade 8
Total questions: 10
Worksheet time: 5mins
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
