- The egg hatches into a baby bird - Baby bird eats - Grows into an adult bird - The bird finds a mate - The pair build a nest - The birds lay eggs. What might be the first step of the process?
Ans: A bird lays an egg

- Bacteria enters through the wound - The bacteria reproduces and spreads - Causes symptoms - The bacteria is either fought off or becomes a disease. What might be the first step of the process?
Ans: Skin is cut or damaged

- The blood is passed through the nephrons in the kidneys - The kidneys filter the waste from the blood - The clean blood is circulated out of the kidneys - Excess water and waste is expelled from the kidneys in the form of urine. What might be the first step of the process?
Ans: The kidneys receive blood through the renal artery

- Aluminum flows into streams and lakes - Acid rain dissolves minerals and nutrients in soil - Washes them away so plants can't benefit from them - PH in soil and water gets affected which can kill plants and animals - Acid rain in fog at higher elevations can strip foliage off trees. What might be the first step of the process?
Ans: Acid rain leaches aluminum from clay particles in soil