Look at the spectrum of Star 1 which is moving towards Earth and the spectrum of Star 2 which is moving away from Earth. The band in the middle represents the spectrum of a motionless light source Which of these is a correct inference that can be draw from the observation of the three spectrums?
The spectrum shifts towards the red region when the star moves towards Earth.
The spectrum shifts towards the blue region when the star moves towards Earth
The spectrum is identical for moving stars and motionless stars.
The spectrum is identical for stars moving away from Earth and stars moving towards Earth.

Tara sees a commercial for a brand of pills that promise to boost energy and people perform better in work and school. as people in the commercial talk about how much better they feel when taking the pill, tara notices a message on the bottom of the screen that reads, "this pill is not approved by doctors and has not been tested in controlled experiments." what is the best conclusion that tara should make about the commercial? it is making scientific claims based on subjective observations. it is making scientific claims based on opinions instead of pseudoscientific facts. it is making pseudoscientific claims based on objective observations. it is making pseudoscientific claims based on opinions instead of scientific facts.

How do cells grow and reproduce to maintain homeostasis?

Elephants in the savanna regions of africa dig holes in dried up river beds to reach water lying just below the surface. these holes provide drinking water for other animals as well. so, without the elephants, many animals might otherwise die from lack of water during the dry season. the location in which the elephants live is an example of a/n and the role they play in creating water holes is an example of a a) ecosystem; habitat b) community; niche c) habitat; niche d) niche; habitat