Superposition means that one geological form evolves into an other one. Cross cutting determines whether the relationship to one thing is related to another, and it determines how old or young thins are. The Grand Canyon demonstrates superposition and cross cutting because this place is very old, but new things could also be evolving there. The Grand Canyon demonstrated superposition and cross cutting in many ways.
        The Grand Canyon shows superposition because this place shows that the rocks at the bottom are the oldest, and the ones at the top are the youngest. This shows how it is possible to determine the age of the rocks. Superposition is great for the Grand Canyon because it has formed a long time ago. Cross cutting is apart of the Grand Canyon also because it also shows the age of the rocks there in the Grand Canyon. That is how the Grand Canyon demonstrates superposition and cross cutting. 
      Peppered moths weren't always dark, and they always didn't have those dark "peppered" spots on their body. According to the project we did in science, many people in England thought of different reasons to why  the peppered moths had different body color. The main reasons is because the darkness in the moth is a genetic thing. The moth's offspring will usually have that gene, which is why there are dark spots on the moth. The other reason is from natural selection. Scientists thought the color change of the moths was an example of  natural selection. Natural selection explains how species evolve and change over time. 
        In this case, the moths changed because of pollution. Their natural habitats were being polluted by factories, so they learned to adapt and change to that. The pollution of gas caused the forests to become dark. I think the color of peppered moth will stay the same. It helps them survive in the wild, and nothing has been changed.
     Overpopulation and limited resources can create competition. How can that be you ask? Well, it can created competition because if there are too many people, and the resources are limited to a small amount,  of course it will create competition. Take an animal and it's prey for example. There are probably other animals searching for that same prey, but there are a limited amount of that prey; that creates competition. 
         I think this type of problem can lead to evolution over time. I know that this type of problem can't last for long, because overpopulation ends. People only have one life, and eventually everybody will die. So it makes room for new generations. If it does happen, I think we will be able to adapt to it. Somethings things may run out, but there aren't always limited supplies of it. People will probably just get over it because not everybody likes the same thing. Evolution is an important role in human history. It helped our lives evolve and become something better and newer. This competition of limited resources and overpopulation can lead to evolution over time. 
       You're probably wondering what this project is about; well, here's a blog post all about it! The Paper Pet Family project was something we did in science class to help us understand genotypes and phenotypes better. We had to partner up with our partners for this project. We were the parents, and the six paper pets were our imaginary kids. To determine our genotypes, both of us flipped a coin twice. For example, my genotype was Tt and my partner's genotype was TT. We used that to determine our kids' genotypes. We had to flip the coin twice for every kid. After we determined all the genotypes, it was time to make the kids. The phenotype was based on what we got for the genotype, and there was a table of physical features that had the genotypes. 
         From this project, I learned more about genotypes and how it is transferred from the parents to the offspring. I know it isn't as simple as it was in class, but it gives a pretty good idea on how it's mainly done. This relates to my family and I in many ways. Well, for one, that was how all of us get our physical features. And two, it determines which trait we received the most from our parents, just like the Paper Pets.