1) I am a tiny invader, but I can make you sick. Your body fights me with white blood cells. What am I? 2) I block the Sun’s light, and when I do, I cast a shadow on the Moon. What am I? 3) I help you breathe, though you cannot see me. I move in and out of your lungs with every breath. What am I? 4) I am a protective shield, always on guard, stopping harmful invaders from entering your body. What am I? 5) I’m a force that makes things fall to the ground and keeps your feet on the Earth. What am I? 6) I’m the invisible layer that surrounds the Earth and protects you from the Sun’s harmful rays. What am I? 7) I’m the only planet in our solar system known to have water and life. What am I?

Science riddles

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