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AnnZ [28]
1 year ago
15

Students are investigating the distribution of dandelions using quadrats.

Biology
1 answer:
Drupady [299]1 year ago
8 0

Students are investigating the distribution of dandelions using quadrats. The students could during their investigation is they can do the pH test and the effect if it is happening or not.

<h3>What is pH?</h3>

pH is the measurement of the acidity or alkalinity of a substance. PH is a scale that marks from 0 to 12. The substance above 7 is acidic and the substance that is basic comes after 7. 7 is the number for neutral, which is pure water. The pH test is very easy to conduct.

To be sure that pH of the soil will not affect the distribution of dandelions. They first test the pH of the soil.

To learn more about  pH, refer to the link:

brainly.com/question/1979364

#SPJ1

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VikaD [51]

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6 0
3 years ago
This allele is only expressed when two copies are present. *
geniusboy [140]

Answer:

recessive

Explanation:

allele that is not expressed unless two copies are present in an organism's genotype

7 0
3 years ago
If you flip a penny 99 times and each time it came up heads then the chance of the penny coming up heads is ___
Helga [31]
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There are 1 out of 2 chances of it occurring or 1/2. Divide that and multiply it by 100% to get the probability in percent. So the answer will be 50%.

The answer is B.
5 0
3 years ago
A pH of 7, [H+]=[OH] below pH 7, which of these is greater_____. Bases have a pH that is ______ than 7
Troyanec [42]

Answer:

<h3>A pH of 7, [H+]=[OH] below pH 7, which of these is greater <u>H+</u>. Bases have a pH that is <u>More</u> than 7</h3>

6 0
3 years ago
Read 2 more answers
Independent and Dependent Variable Practice
Talja [164]

Answer:

1) IV: The quantity of salt added

DV: The resultant density of the salinated water

Hypothesis: The egg will float when the  mass of the volume of the salinated solution displaced by the egg is equal to or larger than the mass of the egg

2) IV: The extension of the rubber band above original length in centimetres

DV: The distance flown by the rubber band

Hypothesis: The potential energy stored in the rubber band by pulling will be transformed into kinetic energy and the larger the extension, the larger the stored potential energy, and the larger the resultant kinetic energy, the higher the velocity and the further the distance flown

3) IV: The wing span of a paper airplane

DV: The distance flown by the plane

Hypothesis; The glide of the airplane is a factor of the wings span increased wingspan increased glide and increased travel distance

4) IV: Presence of more light

DV: Height to which plant grows

Hypothesis: Photosynthesis, which is the conversion of carbon dioxide and water into glucose and oxygen in the presence of Sunlight is essential for plant growth and the more the presence on light is increases the higher plant will tend to grow

5) IV: Amount of vinegar in the canister

DV: The height a rocket will launch

Hypothesis: With a given amount of baking soda, in the canister a little amount of vinegar causes a delayed launch but an increased build up of carbon dioxide resulting in higher height reached than when more vinegar is used in which case the lift off will be more rapid but the power will be lesser and the height reached reduced

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DV: The number of drops held

Hypothesis: Due to surface tension and cohesion which are properties that increase with surface area and as such a coin with a larger surface area holds more water drops

7. IV: Number of hours of study

DV: Science score

Hypothesis: A student science scores is directly related to the amount of science topics thought the student is able to respond to in a test and it is directly proportional to the amount of study the student has done  related to the science topics

Explanation:

5 0
3 years ago
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