Which statements are true regarding the cosmological principle? 1 the universe looks the same from all directions, but can change and evolve over time. 2 the universe looks the same from all directions, and hasn't and won't change or evolve over time. 3 the universe can't be studied scientifically because scientists can't directly test their hypotheses. 4 scientists can study the universe because the cosmological principle suggests that any physical laws or processes are the same for the entire universe.

There are two correct statements, they are:

1. The universe looks the same from all directions, but can change and evolve over time.

4. Scientists can study the universe because the cosmological principle suggests that any physical laws or processes are the same for the entire universe.

brain development. a child's brain undergoes an amazing period of development from birth to three—producing more than a million neural connections each second. the development of the brain is influenced by many factors, including a child's relationships, experiences and environment.

explanation:

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%