Answer:
20
Explanation:
number of protons+ number of neutrons= mass of atom
19+n=39
n=39-19=20
number of neutrons=20
Answer:
As the world warms due to greenhouse gases carbon dioxide included waters heat up and expand, causing sea levels to rise. Removing the extra ocean heat caused by even short-lived gases, and consequently lowering sea levels, is an extremely slow process.
Answer:
- Explanation: The undulating and rough terrains are areas where grassland and woodlands develop and give shelter to a variety of wild life.
Explanation:
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A flat plain that is formed on the seabed where a river deposits material over many years would be specified as a Delta.