HERTZSPRUNG-RUSSELL DIAGRAM Spectral Class
o
B
A
G
M
Spica
Deneb SUPERGIANTS
Betelgeux
Aldebaran
GLANTS
Sirius A
Absolute Magnitude
MAIN SEQUENCE
Sun
10
12
Sirius B
WHITE DWARFS
14
16
Proxima
Centus
4,000 3,000
30,000
20,000
10,000 7,000 6,000
Temperature (K)
space fm
Which of the following stars is the brightest?
Sirius B
O Proxima Centuri
Sun
Deneb

Fill in the blank 1. digestion occurs in the small intestine through the action of enzymes. 2. urea, excess water, and other waste materials are eliminated in a water fluid called 3. can cause infections by injecting dna or rna into hosts. 4. the human immune system produces in response to a vaccine, which later can bind to and destroy a pathogen if it invades. 5. are structures that link bone to bone at a joint 6. in the heart, blood flows from the right atrium to the right ventricle, where it is pumped to the the words i can use are: lymphocytes gliding pivot gas urine absorption dermis fulcrum lungs chemical viruses capillary vertebrae esophagus tendons antibodies synapses ligaments kidneys pathogens