Which of the following questions does the author answer in the first paragraph?

• In which months does most snow fall?

• How are snowflakes formed?

• What is the optimum temperature for snow?

• Why are snowflakes hexagonal?

The word "minute" in line 1 is closest in meaning to ....

• tiny

• quick

• clear

• sharp

What is the center of an ice crystal?

• A drop of water

• A hexagon

• A small snowflake

• A nucleus

The word " adhere" in line 10 is closest in meaning to ....

• stick

• relate

• speed

• belong

What is the main topic of the second paragraph?

• How moisture affects temperature

• What happens when ice crystal melt

• Where the moisture to supply the nuclei comes from

• How ice crystal from

The word "it" in line 15 refers to ....

• snowflake

• snowfall

• cluster

• moisture

What is necessary for a snowball to persist?

• A change in the direction of the airstream

• Lowered vapor pressure in ice crystals

• A decrease in the number of snowflakes

• A continuous infusion of moisture

How do lake-effect snowstorms form?

• Water temperature drop below freezing.

• Large quantities of wet air come off a nearby mountain.

• Millions of ice crystals form on the surface of a large lake.

• Moisture rises from a lake into the airstream.

The word "initiate" in line 24 is closest in meaning to ....

• begin

• enhance

• alter

• increase

Which of the following could account for the lack of snowfall in a geographical location close to mountains and a major water source?

• Too much wind off the mountains.

• Ground temperatures below the freezing point.

• Atmospheric temperatures above the freezing point.

• Too much moisture in the air.