Problem: - Some is reflected back into space - The rest of the energy is absorbed by land and oceans, heating the Earth - Heat radiates from Earth to space - Some of this heat is trapped by greenhouse gases in the atmosphere - Human activities such as burning fuel are increasing the amount of greenhouses gases - This causes more heat radiation to stay trapped in our atmosphere - The Earth's temperature rises - What might be the first step of the process?

A: Solar radiation reaches Earth's atmosphere

Problem: - Mix in milk, eggs, and melted butter - Mix until smooth - Heat a griddle or frying pan to medium high - Pour batter onto the griddle - What might be the first step of the process?

A: Mix flour, baking powder, sugar, and salt into a bowl

Problem: - Water is poured into the well of the machine - A filter is placed in the basket - Ground coffee is measured into the filter - Turning on the machine starts the water heating - The hot water rises up - The water drops into the ground coffee - The hot water passes through the grounds - The coffee drips into the pot from the basket. What might be the first step of the process?

A: The coffee pot is filled with water

Problem: - The particles remove small pieces of the rock each time they touch the rocks - The particles continue to hit, brush against, or grow against the rocks - The rock eventually is broken apart by this contact - The pieces of the rock are now small rocks - The rock pieces are worn away into smaller and smaller pieces by the same forces - What might be the first step of the process?

A:
Particles in the environment interact with rocks