Salt water is an example of a heterogeneous mixture, because the different substances dissolved in the water are easily identified and separated.

question 6 options:
true
false

Which geologic feature would most likely be represented by contour lines john far apart from one another? a cliff a hill a plain a valley

How does the carbon cycle involve an exchange of carbon

Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled