Answer:

1. The meteor or comet only appear in the sky when it's their time.

2. No. It happens After 10-60 years

3. Meteorite is dangerous to earth because, it's a large rock who can destroy the part of the earth when it hits.

1.Comets also create meteoroids as they orbit the sun and shed dust and debris. When a meteoroid enters the Earth's upper atmosphere, it heats up due to friction from the air. The heat causes gases around the meteoroid to glow brightly, and a meteor appears

2.If it's time for a meteor shower, you won't need a telescope, binoculars, or a high mountain to have a "star gazing" party. You might need a warm sleeping bag and an alarm clock to wake you in the middle of the night. But then just lying down in your own back yard will put you in the perfect spot to enjoy a great show.

3.When meteoroids enter Earth’s atmosphere, or that of another planet, like Mars, at high speed and burn up, they’re called meteors. This is also when we refer to them as “shooting stars.” Sometimes meteors can even appear brighter than Venus -- that’s when we call them “fireballs.” Scientists estimate that about 48.5 tons (44,000 kilograms) of meteoritic material falls on Earth each day.

When a meteoroid survives its trip through the atmosphere and hits the ground, it’s called a meteorite.