1) What is the boiling point of water? a) 100°C b) 90°C c) 50°C d) 120°C 2) Which planet is known as the Red Planet? a) Mars b) Jupiter c) Venus d) Saturn 3) What gas do plants absorb from the atmosphere? a) Oxygen b) Carbon Dioxide c) Nitrogen d) Hydrogen 4) What is the hardest natural substance? a) Gold b) Iron c) Diamond d) Granite 5) Which is NOT a state of matter? a) Solid b) Liquid c) Gas d) Plasma 6) What is the chemical symbol for gold? a) Au b) Ag c) Fe d) Hg 7) How many planets are in our solar system? a) 7 b) 8 c) 9 d) 10 8) What force keeps us on the ground? a) Magnetism b) Gravity c) Friction d) Tension 9) What is the main gas in Earth's atmosphere? a) Oxygen b) Hydrogen c) Carbon Dioxide d) Nitrogen 10) What is the process by which plants make food? a) Respiration b) Photosynthesis c) Digestion d) Transpiration 11) What is the center of an atom called? a) Nucleus b) Electron c) Proton d) Neutron 12) Which vitamin is produced by the human skin? a) Vitamin A b) Vitamin B c) Vitamin C d) Vitamin D 13) What is the most abundant element in the universe? a) Oxygen b) Carbon c) Hydrogen d) Helium 14) Which of these is a non-renewable resource? a) Solar b) Wind c) Coal d) Water 15) What type of animal is a frog? a) Mammal b) Reptile c) Amphibian d) Bird 16) What is the boiling point of water? a) 100°C b) 90°C c) 50°C d) 120°C 17) Which gas is most abundant in Earth's atmosphere? a) Oxygen b) Nitrogen c) Carbon Dioxide d) Hydrogen 18) What is the chemical symbol for gold? a) Au b) Ag c) Fe d) Hg 19) Which planet is known as the Red Planet? a) Mars b) Jupiter c) Saturn d) Venus 20) What force keeps us on the ground? a) Magnetism b) Gravity c) Friction d) Inertia 21) What is the hardest natural substance? a) Gold b) Iron c) Diamond d) Quartz 22) What do plants release during photosynthesis? a) Oxygen b) Carbon Dioxide c) Nitrogen d) Methane 23) Which vitamin is produced by the human skin in sunlight? a) Vitamin A b) Vitamin B c) Vitamin C d) Vitamin D 24) What is the main gas found in the sun? a) Oxygen b) Hydrogen c) Helium d) Carbon Dioxide 25) Which of these is a non-renewable resource? a) Solar b) Wind c) Coal d) Trees

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