Answer: An emission nebula is a cloud of ionized gas. The most common source for ionizations are high energy photons emitted from a nearby star. These can be among some of the most colorful objects in the sky. Reflection Nebulae are clouds of dust which are simply reflecting the light of a nearby star or stars.
Explanation:
Answer:
Radioactive isotopes has a characteristic half life that is ranging from less than a second to million of years.
Explanation:
One of the characteristics of radioactive material is that the radio active isotopes instantly gives off particles. This process is termed as radio active decay.For this activity pennies are used pennies headed up it means that nuclei have undergone radio active decay, or tails up it means that nuclei that haven't yet decayed.
Answer:
Some tadpoles develop a chronic ilnness called yuraspasticitis causing decreased growth rates.
Explanation:
Yuraspasticitis is a common issue in the tadpole population of high tadpole density ponds. It is caused by a bacterial penetration of the urass gland.
Answer:
They look like X's (X shape)
Explanation:
The X shape are replicated chromosomes and are called the sister chromatids.
