Objects fall down instead of floating away. - Gravity pulls everything towards Earth., Water turns into vapor — this is evaporation. - Heat from the sun warms up water in lakes and oceans., It turns into tiny water droplets — this is condensation. - Water vapor in the air cools down., It helps us stand, move, and protects our organs. - The skeleton supports the body., The prey population decreases. - A predator hunts another animal for food.,

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?