Add a prefix to virus to create a word meaning software that protects a computer from harm.

Add a prefix to action to create a word meaning an instance of buying or selling something.

According to the passage, what are the winter months in North America?

Winter is the best season of the year. During the winter months, temperatures are usually colder and there are fewer hours of daylight. The winter months in North America are December, January, February and March.

According to the passage, what causes the seasons to change?

Cold winter temperatures are caused by the tilting of the earth. When Earth's Northern Hemisphere is tilted away from the sun, there are fewer hours of daylight and the temperature is colder. When the Northern Hemisphere tilts toward the sun, there is more daylight time and the temperatures are warmer. The tilting of the Earth as it spins causes the seasons to change.

Which word is the opposite of the word originate?

Which word is an antonym or opposite of diverted?

Check off the effects of a volcanic eruption that might be good for the area.