Imagine you are volunteering in a 1st-grade classroom. The students recently learned about the water cycle. One student raises her hand and asks, "I heard that elements like carbon can cycle too. How does the carbon cycle? Is it like water cycles?" How would you explain the cycling of carbon to a 1st-grade student who has not taken an advanced science course?!

Plants take in carbon dioxide, water and light from the sun. The plants' leaves then use a special process to convert the carbon dioxide, water and sunlight into oxygen and sugar. The sugar provides food for the plant and it breathes the oxygen out into the atmosphere. This process is called photosynthesis, and it is necessary for plant life

Explanation:

in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation: