Hail Formation

Hail(stones) form when water droplets in clouds become

• extremely heavy

• extremely cold

• extremely warm

• extremely large

Hailstone gets bigger by

• keep colliding (bumping) into freezing water vapor

• keep colliding (bumping) into other hailstones

• keep colliding (bumping) into freezing water droplets

Updraft is

• upward movement of water

• upward movement of air

• horizontal movement of air

A strong updraft is created when

• air temperature near the ground is much warmer than the air temperature in the atmosphere

• air temperature near the ground is similar to the air temperature in the atmosphere

• air temperature near the ground is much cooler than the air temperature in the atmosphere

The speed (how fast or slow) of updraft represents ___________ the updraft is

• the direction of

• how strong

• the color of

The speed of the updraft for forming a smaller hailstone is ______ than the speed of the updraft for forming a larger hailstone

• larger

• the same

• smaller

When the updraft is larger than the weight of the hailstone,

• the hailstone rises

• the hailstone floats

• the hailstone falls

A large water droplet has the weight of 0.03 N. If the updraft is 0.3 N, the water droplet will

• fall

• rise

• float

A large hailstone has the weight of 3 N, to keep it floating in the air, the updraft needs to be

• 30 N

• 0.3 N

• 3 N

Many storms only produce rain because

• no ice pieces were produced in the clouds

• tiny ice pieces melted in warm air on their way down

• tiny ice pieces melted in cold air on their way down