Problem: - Sunlight passes through the glass into the greenhouse - The plants and floor absorb the the sunlight - The absorbed sunlight is converted to heat - The heat cannot escape the glass - The heat is trapped in the greenhouse - The hot air rises - The colder air at the top is pushed to the bottom What might be the last step of the process?

A: The colder air is then warmed by the floor and the plants.

Problem: - Place the water in a pot - 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 What might be the last step of the process?

A: Salt is left behind in the original pot.

Problem: - The body's temperature increases over 98.6 degrees F - The hypothalamus in the brain sends a message to the body - Sweat glands in the skin receive the message - The sweat glands start combining water and chemicals to make sweat What might be the last step of the process?

A: The sweat leaves the skin through pores.

Problem: - Contact is made with a virus - The virus enters the human or animal body - The virus goes to the part of the body that contains its food - The virus consumes part of the body or materials that the body uses - The virus replicates and spreads What might be the last step of the process?

A:
The virus causes symptoms in the body as the immune system tries to expel the virus.