2 What could the reader infer from the reading about hydrocarbons?
A
Life started on other planets before it started on Earth.
B
All planets and satellites in the solar system contain hydrocarbons.
С
The building blocks of carbon-based life are found on planets or
satellites other than Earth.
D
D
No bodies in our solar system except Earth contain hydrocarbons.

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?

An alpha particle is: a hydrogen atom a nucleus of helium two neutrons an electron