Read the text "How to predict weather".
Here are some tips for weather prediction.
They are very sensitive to atmospheric pressure and they are very good as weather predictors. For example, insect-eating birds usually fly higher in good weather, but they often fly lower if a storm is approaching.
Watch a fire.
If fire smoke rises steadily, the weather is going to be fine. If it turns or comes closer to the ground, a storm or snow is approaching.
When wet weather is on the way, sounds are heard more clearly. The smell of flowers and other plants becomes more distinctive before the arrival of rain. A grey evening sky means that rain is about to happen.
Write three words into each gap:
1. They are very pressure and they are very good as weather predictors.
2. The smell of flowers and other plants before the arrival of rain.
3. A grey evening sky means that rain is .