answer:The sentence "John went to the store" is a declarative sentence. It indicates an action that occurred in the past.

answer:I want to be a scientist when I grow up.

answer:Material science is an important field because it helps us to understand how different materials interact with each other and how their properties can be manipulated to develop new products. Material science can be applied to a wide range of applications, from the development of new medical technologies to the production of lightweight and durable materials for aerospace engineering. It can also help to reduce the environmental footprint of manufactured goods.

answer:Shining brightly in the night sky, I ponder what you are. Your beauty is so fascinating, a sight for us to admire. Twinkle twinkle little star, how I wonder what you are.