A. Crust
B. Mantle
C. Outer core
D. Inner core
What is the main function of lungs?
A. Pump blood
B. Exchange gases
C. Digest food
D. Control movement
Which technology enables self-driving cars?
A. Blockchain
B. Artificial intelligence
C. GPS only
D. Radio waves
Which part of the plant makes food?
A. Root
B. Stem
C. Leaves
D. Flower
Which force pulls objects toward Earth?
A. Magnetism
B. Friction
C. Gravity
D. Pressure
Which gas do humans breathe in for survival?
A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Helium
What is the smallest particle of an element?
A. Molecule
B. Atom
C. Cell
D. Electron
Which organ removes waste from human blood?
A. Liver
B. Kidneys
C. Lungs
D. Heart
What is the main source of energy for Earth?
A. Wind
B. Sun
C. Water
D. Coal
Which planet is known as the Red Planet?
A. Venus
B. Jupiter
C. Mars
D. Saturn