Problem: What is the missing first step of the following process: - Cover the pot with a slightly too large cover - Place a larger pot under the first - Heat water to evaporation - Water vapor will collect on the lid - Drip into the second pot as fresh water - Salt is left behind in the original pot.

A: Place the water in a pot

Problem: What is the missing first step of the following process: - May come from different sources - The gases remain trapped in the atmosphere - Through the suns light the gases hold in heat and energy - Trap them in our atmosphere - The earth may become warmer this way.

A: Several types of gases form in the atmosphere

Problem: What is the missing first step of the following process: - The sediments become glued together - The glued together parts become hard like cement - The sediment becomes a big rock - The rocks erode slowly - The rocks come apart - The rocks become smaller rocks - The rocks continue to erode into smaller rocks - The process starts again.

A: Minerals fill spaces between bits of sediment

Problem: What is the missing first step of the following process: - The seeds are dispersed by wind, animals, etc - The seeds reach the ground - Grow into new trees - These new trees produce seeds - The process repeats itself over and over -

A:
A tree produces seeds