Biology, 28.08.2020 18:01 CassidgTab

Sarah wanted to find out if heat had an effect on the growth of mold. She grew mold in nine jars. Each jar had the same amount and type of food. Three jars were kept at 0ºC. Three were kept at 90ºC. Three were kept at 27ºC. After four days she recorded the growth of the mold

Answers: 2

Show answers

Answers

This question is incomplete; but from the understanding of the question, it is about identifying the variables in the experiment e.g independent variable, dependent variable, control variable, control group etc.

The variables are as follows:

Independent variable: HEAT at different temperatures

Dependent variable: GROWTH OF MOLD

Constants/Control variables: Same amount of food, Same type of food

Control group: Jars kept at 0°C

Explanation:

A variable in an experiment are those factors that are subject to change. The INDEPENDENT VARIABLE in an experiment is that variable that is manipulated or controlled in order to bring about an outcome. In this Sarah's experiment, the independent variable is the HEAT CHANGE.

The DEPENDENT variable is the variable that responds to the changes made to the independent variable. The response of the dependent variable is dependent on the independent variable. In this experiment, the dependent variable is the GROWTH OF THE MOLDS because it responds to changes in heat (independent variable).

The CONSTANT or CONTROL variables in an experiment refers to the variables that are kept constant or unchanged throughout the experiment. Although they are not part of the experiment but they can affect the outcome of the experiment if changed. The constants in this experiment are the SAME AMOUNT and SAME TYPE OF FOOD given to each jar.

A CONTROL group is the group that does not receive any experimental treatment I.e. In this experiment, the jars placed at 0°C did not receive any heat, hence, they are the control group.

The experimental groups were the jars kept at 90°C and 27°C respectively.

Answer from: Quest

answer: although many types of viruses can cause a common cold, rhinoviruses are the most common culprit. a cold virus enters your body through your mouth, eyes or nose. the virus can spread through droplets in the air when someone who is sick coughs, sneezes or talks. theres your answer

explanation:

Answer from: Quest

a metamorphic rock would be formed.

Another question on Biology

Biology, 21.06.2019 13:30

The kobe habor wharfs where the center of japanese exports to other countries. it had 200 wharfs before the earthquake. how many wharfs remained undamaged after the earthquake? a. 130 wharfts b. 3 wharfs c. 30 wharfs

Answers: 1

Answer

Biology, 22.06.2019 03:00

To answer this question, researchers studied populations of the dusky salamander (desmognathus ochrophaeus) living on different mountain ranges in the southern appalachian mountains. the researchers tested the reproductive isolation of pairs of salamander populations by leaving one male and one female together and later checking the females for the presence of sperm. four mating combinations were tested for each pair of populations (a and b)â€”two within the same population (female a with male a and female b with male b) and two between populations (female a with male b and female b with male a). the proportion of successful matings for each mating combination was measured. for example, when all the matings of a particular combination were successful, the researchers gave it a value of 1; when none of the matings were successful, they gave it a value of 0. then the researchers calculated an index of reproductive isolation that ranged from 0 (no isolation) to 2 (full isolation). the reproductive isolation value for two populations is the sum of the proportion of successful matings of each type within populations (aa + bb) minus the sum of the proportion of successful matings of each type between populations (ab + ba). the table provides data for the geographic distances and reproductive isolation values for 27 pairs of dusky salamander populations.

Answers: 1

Answer

Biology, 22.06.2019 05:30

If a strand of dna has 35% thymine. what is the percentage of cytosine, adenine, guanine?

Answers: 3

Answer

Biology, 22.06.2019 07:50

How are fungi more like an animal? they have a cell wall. they are heterotrophs that absorb their food. they produce seeds and have membrane-bound nucleus. they use sunlight for photosynthesis.

Answers: 1

Answer

You know the right answer?

Sarah wanted to find out if heat had an effect on the growth of mold. She grew mold in nine jars. Ea...

Questions