The composition of a star can be identified by

A. its apparent magnitude

B. the size of the star.

C. the lines in its spectrum.

D. the intensity of its radiation.

10. Chemical changes result in new substances, but physical changes do not. Which process is an example of a chemical change? A. chopping a tree B. cooking a steak C. heating a cup of tea D. drying clothes in the dryer

There are approximately 1,386 million cubic kilometers (km3) of water on Earth. Approximately how much of that total is fresh water? 4,158,000 km3 41,580,000 km3 134,442,000 km3 415,800,000 km3 1,344,420,000 km3

What is the outer cell called

A group of organisms of the same species that live in an area is called a (n)

What has caused a 90% decrease in Southern California steelhead run sizes? a. erosion b. dams along water sources c. oil drilling d. biomass contamination

Which of the following is a stress-related disorder/disease? (Choose all that apply.) -Migraine headaches -tense muscles -heart disease -tmj dysfunction -asthma -anxiety disorder -backache -chronic fatigue -high blood pressure -cold and flu

Which conversion is controlled by insulin?

which process relies most on gravity? A. Mass wasting B. Physical weathering C. Chemical weathering D. Erosion

Name two substances in the body that will move based on the principles of diffusion

Las enfermedades más comunes en el mundo.