Describe how to find the hardness of an unknown mineral.

2 answers:

6 0

For this you would require two specimens of the same nature. You take a normal hammer and a paper and pencil, and hit it gently and continue to hit it harder till it breaks, record the results.

dsp734 years ago

5 0

The scratch test.

The scratch test is used by scientists and people who study rocks and minerals to determine the strength of the rock. They have the scratchers numbered one through ten and scratch the rock or mineral until the scratcher makes a mark in the mineral then they know the strength of the rock.

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During upwelling, nutrient-rich water rises to the surface. How would this most likely affect the biotic components of the ecosy

hodyreva [135]

Answer: Increase in species numbers and diversity

Explanation:

Upwelling is an oceanographic phenomena in which the water from the bottom layers of the ocean usually above the seafloor get displaced and reach upto the surface layers with the effect of wind currents. The water carries away along with it the nutrients and the organic matter to the surface layers which allows the efficient growth of plant and planktonic diversity which favors the growth of sea animals like fishes and others. Hence, by this way the species diversity and numbers increases by the process of upwelling.

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Answer:

I need to see an image of the pedigree

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Snowcat [4.5K]

True

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4 years ago

Designing an Experiment

padilas [110]

<h3>Answers: the plant under the uv light for eight hours is <u><em>experimental group </em></u></h3><h3>The amount of water that is given to all of the plants is</h3><h3><u><em>controlled variable </em></u></h3><h3><u><em></em></u></h3><h3>The plants that are under the light for six hours</h3>

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3 years ago

In an experiment, heat is added to a liquid at a constant rate of 10 degrees Celsius per minute. If the starting temperature is

Rainbow [258]

Answer:

75 degrees

Explanation:

The start up temperature is 25 degrees and every 1 minute it increases by 10 degrees, in 5 minutes (10*5) equals 50degrees plus start up temperature of 25 degrees equals 75 degrees

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