How does heat effect growth?

Question

How would I carry out an experiment about it using the scientific method?

Answer 1

The experiment using the scientific method would be very simple:

1) You have an experiment growing whatever you might be growing at natural, normal heat levels. This is your control.
2) You have another experiment growing the same amount of the same thing at higher hevel levels. You are testing this relative to your control.
3) You have antoher experiment growing the same amount of the same thing at the LACK of certain heat levels, also comparing to your control.

With this range of experiments, you can thus experiment scientifically as to what extent heat plays a role in growth of whatever specimen you may be testing.

-Kevin

Answer 2

Example of an experiment: Effect of sunlight on moss growth rates

Question: How does direct sunlight affect moss growth?

Background: Mosses are nonvascular plants. Because mosses do not have vascular tissue, they are not able to grow very large. Most mosses are only a few centimeters tall. Some places where mosses grow are in sidewalk cracks, along the sides of buildings, and at the base of trees in a forest.

Materials: 4 clumps of fresh moss, 4 medium-sized paper cups, soil, scissors, hand lens, water.

Procedure:

Collect moss specimens form the area where you live. Describe the moss plants.
Collect enough soil in which to grow the moss specimens.
Cut each of the 4 paper cups in half.
Fill the 4 paper cups with the soil and pant a clump of moss in each cup
Label cups 1 and 2 ìSunlightî and cups 3 and 4 in an area where the moss plants will receive indirect sunlight for part of the day and will be shaded the rest of the day.
Place cups 1 and 2 in an area where the moss plants will receive direct sunlight for most of the day. Place cups 3 and 4 in an area where the moss plants will receive indirect sunlight for part of the day and will be shaded the rest of the day.
Water the moss plants each day. Be sure to give the same amount of water to each plant.
Hypothesize: What effect do you think direct sunlight will have on the growth of moss plants?
After 4-5 days, examine the moss plants with a hand-lens and record observations. Upon completion, answer these questions:
Which moss plants grew best?
What environmental conditions are best for the growth of moss plants?

Answer 3

The scientific method is just that... a system that scientists use to perform experiments testing and validating their hypothesis.

Heat would probably increase growth up to a certain point.

Answer 4

Effect of Heat on Bacterial Growth

I. Sterilization – destruction of all life, including spores.

A. At high temperatures, enzymes are denatured and consequently inactivated (usually results in a bactericidal effect).
B. Moist Heat (generally, steam under pressure) is a more effective way to sterilize than dry heat, penetrates the cell more efficiently.

C. Moist heat vs. dry heat

Treatment
Time to sterilize

Dry Heat (160-180º C)
1.5 -- 3 hours

Moist Heat (121º C)
15 minutes


II. Microbes vary in resistance to heat

Microbe
Killing Temperature

Bacterial Cell
60-70º C in 10 min

Bacterial Spore
Temp > 100ºC

Fungal Cell
50-60º C in 10 min

Fungal Spore
70-80º C in 10 min.


III. Ways to apply heat treatments

A. Autoclave – steam under pressure (121º C at 15 psi for 15 min).

B. Boiling Water -- free-flowing steam (Takes 30 min to kill vegetative cells, several hours to kill spores).

C. Tyndalization – can be used to sterilize thermolabile solutions

similerely crystels, cigerettes , etc etc

Answer 5

Growth of what? Plants? It helps them grow as the nutrients move more quickly between the roots and the foliage.

Answer 6

growth of what?