list three things that an astronomer can learn about a star by studying its spectrum.

Which are ways that many countries transport surface water

Which of the following units of measure should be used to measure the length of an automobile? A.) centimeter B.) meter C.) kilometer D.) millimeter (Earth Science)

Sexual reproduction promotes genetic variation. One way variation occurs is via the production of gametes during meiosis. Sexual organisms are the product of sperm and egg, receiving chromosomes from both parents.

Homeostasis is the process through which an organism regulates its internal environment in order to maintain a stable and constant condition.

Chicken-pox is a common childhood virus. Typically, during the first day of exposure, the victim gets sniffles and begins running a fever. By the second day, small sores have broken out all over the body.

Does an electric current cause a coiled wire to become an electric bell

Which is a renewable resource? A) coal B) sunshine C) gasoline D) natural gas

How are fitness and adaptation important to natural selection?

Where do the light-independent reactions of photosynthesis occur? A. Stroma B. Thylakoids C. Cell cytoplasm D. Intermembrane space

What causes pioneer grasses and weeds that have grown in an abandoned field to die?