Scientists have evidence that carbon dioxide can trap heat. scientists know that burning fossil fuels releases carbon dioxide. based on this information, what will burning fossil fuels do to earth?
make it colder
there will be no change
there is no way to test this idea
make it warmer

The correct answer is D. Make it warmer

Explanation:

One of the most important factors that regulate temperature on Earth is the action of greenhouse gases such as carbon dioxide because these gases trap and reflect back part of the radiation from the sun, which creates a warm environment that is ideal for life. This implies, an increase of carbon dioxide due to the burning of fossil fuels, industries, etc. will lead to more radiation staying on Earth, and therefore there would be an increase in Earths' temperatures. Moreover, this situation might affect negatively life as many species cannot prosper in higher temperatures. According to this, burning fossil fuels will make Earth warmer.

nuclear fission produces elements that are heavier than helium.

the elements that are used in nuclear fission and their products are much heavier than helium.