What causes a bolt of lightning?

a. electrical charges build up in the clouds only.

b. electrical charges build up on the ground only.

c. electrical charges build up in the clouds and on the ground.

d. electrical charges build up in the space between the clouds and the ground.

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?

You are a sales representative for a company that makes a new alternate fuel for vehicles. you have prepared a presentation for the environmental engineers to sell your new product. what question do you expect the audience to ask regarding whether the new fuel will cause less damage to the environment? a. do we have to change any parts of the vehicle to use this alternate fuel? b. will the vehicles get better fuel mileage with the alternate fuel? c. how much greenhouse gas does your fuel produce compared with current fuel sources? d. is the alternate fuel more expensive than fossil fuel?

One form of energy can be another type of energy. a. created to form b. transformed into c. destroyed and then created to form