Can be anything an organism this is to protect itself from severe weather or other dangerous conditions

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

The is a particle with one unit of positive charge a. proton b. positron c. electron d. nucleus awnser quick it is a important science test!

Match term definition ellipse a) diagonal cross section of a cylinder circle b) diagonal cross section through the widest part of a sphere sphere c) cross section parallel to the base of a cone great circle d) shape created when a semi-circle is rotated around the y-axis triangle e) perpendicular cross section of a cone