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AnnZ [28]
3 years ago
6

This is 7th grade science plz help

Biology
1 answer:
Darya [45]3 years ago
4 0
The best estimate for Earth's age is based on radiometric dating of fragments from the Canyon Diablo iron meteorite. From the fragments, scientist calculated the relative abundances of elements that formed as radioactive uranium decayed over billions of years. 
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Compare the physical and chemical properties of a compound to those of the elements of which it is composed.
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Explanation:

Compounds are those substances that are made up of elements that are combined in a fixed proportion or ratio. The individual property of element is lost once it forms a compound. The physical and chemical properties of both compound and an element is different.

Example of a compound is water and its elements are hydrogen and oxygen. Water is a colorless liquid that acts as a solvent and dissolves most of the solutes in it. While oxygen and hydrogen occurs as gases in their elemental state.

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suppose a persons stomach wall was irritated by an over-secretion of stomach acid. why do you think a person would take milk of
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The pH of stomach secretion is low. This means it is acidic. Too much production can corrode the stomach wall. Therefore in such a situation drinking a basic solution with a higher pH neutralizes some of the stomach acidic secretions hence relieving the effect;

Acid + Base - Salt + Water  



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3 years ago
In an ecosystem can there be more carnivores than herbivore? Explain why or why not
Kobotan [32]
There cannot be more carnivores than herbivores because the carnivores eat the herbivores. If there wasn't enough herbivores to eat, then the carnivores would eventually become extinct.
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Idk the answers plz help
levacccp [35]

Answer:

1.) D. algae

2.) A. mutualism

3.) D. They have no flowers, stems, or roots.

4.) A. Lichens and Mosses

Explanation:

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The bones in the wing of a bat have a similar structure to the bones in the arm of a person. This is an example of _____.
ArbitrLikvidat [17]
Yep! The answer is C
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