Ninety percent of the sun is composed of which element?
a. iron
b. helium
c. carbon
d. hydrogen

Describe the characteristics of the nile river and the river’s importance to the people of egypt. write a paragraph of at least 5 complete sentences.

Effective charts and graphs include all of the following except 1. simple, meaningful, attractive design 2. accurate information 3.at least five different colors 5.clear presentation of information

Explain how earths tilt and revolution around the sun affects weather and climate