Answer:
Elements that are heavier than hydrogen are spread throughout the universe only during a supernova explosion. It is an explosion of the stars when the star reaches its death stage. When the star is alive, the gravity of its core squeezes lighter atoms like hydrogen to make heavier atoms like carbon and helium.
Answer:
1. Circulatory System
2. Respiratory System
3. Endocrine System
4. Nervous System
5. Urinary/ Excretory System
Explanation:
1. Circulatory System- The heart pumps blood and blood vessels such as arteries and veins, transports the blood to every part of our body providing organs and muscles with nourishment.
2. Respiratory System- This system maintains our breathing. It supplies the body with oxygen for cellular respiration.
3. Endocrine System- The glands of the endocrine system secrete chemicals called hormones that regulate most of the processes in our bodies like growth, reproduction, metabolism, etc...
4. Nervous System- The entire nervous system controls all of the other systems of the body and it also transmits information to the brain, such as pain and external sensations.
5. Urinary/Excretory System- This system is responsible for eliminating waste products of metabolism and other materials from the body that are of no use.
Carbon- 14 has a half- life of 5,730 years. scientists determine the ages of once-living things by measuring the amount of carbon-14 in the material.
Answer:
Thinking Spatially and Data Analysis - North America ... while states located on a coast have a higher percentage of the U.S.'s Asian population.
Explanation:
i did the quiz