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Korvikt [17]
2 years ago
8

A geologist uses relative dating methods to guess that a rock is between 1 million and 5 million years old. What is one radioact

ive isotope the geologist can use to learn the exact age of the rock?​
Biology
1 answer:
vovangra [49]2 years ago
5 0

Answer:

Scientists usually use the potassium-argon method to date rocks that are older than about 1 million years. Uranium-238 is also used for radiometric dating. It has a half-life of 4.5 billion years. It decays to produce lead-206.

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Explain how a magnification of 400 x can be obtained using the lenses on a light microscope.​
Anvisha [2.4K]

Answer:

Each objective lens has a different magnification. Multiply the magnification of the eyepiece by the magnification of the objective lens to produce total magnification. For example, a 10X ocular lens and a 40X objective lens will produce a total magnification of 400X (10 x 40 = 400).

5 0
3 years ago
How many species of insects are there as of 2017?
Slav-nsk [51]
There are about 950,000 species of insects known but estimates range as high as 2-10 million which means that there are probably many species not yet known which have probably gone undetected so far in perhaps more remote parts of the world.
7 0
3 years ago
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What happens when the temperature of air decreases to the dew point or below the dew point
svet-max [94.6K]

When the temperature of the air becomes almost equal to the dew point the air becomes saturated and the relative humidity during this condition becomes 100%. If the temperature of the air decrease below the dew point the relative humidity will be 100% or exceeds 100%. This condition, when the temperature of the air decreases below the dew point is called supersaturation but most of the time the temperature of the air will be lower than the dew point.


4 0
2 years ago
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Compare the process of carbon fixation in C3 plants to that of C4 plants.
Gre4nikov [31]

Carbon fixation is the process in which plants remove the carbon from atmospheric carbon dioxide and turn it into organic molecules like carbohydrates.

Because different type of plants are located in regions with different conditions they are different types of carbon fixation.  Plants that live in arid regions need to conserve water, while plants that live in more moist conditions will not need to conserve water.

The carbon fixation in C3 plants is one-step process. An oxidation reaction occurs because of the enzyme RuBisCo.  During the oxidation some of the energy used in photosynthesis is lost in a process known as photorespiration.



4 0
3 years ago
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PLEASE HELP! 5TH GRADE SCIENCE
shtirl [24]

Answer:

B

Explanation:

because the sandpaper is rougher than the flat table.

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