Which are examples of chemical weathering. Check all that apply. grinding away of rock surface

acid rain weathering a statue

tree root growing in the crack of a rock

weak acid from lichens weakening a rock

water freezing, expanding, and thawing repeatedly

water dissolving a soft rock

rust weakening a rock

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

no statements shown

the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl