Forces in Nature Review
1. What is Turgor Pressure? Illustrate on the cell below how turgor will affect a rigid cell and identify cell organelle
appearance before and after osmosis.
Vacuole
Vacuole
Nucleus
More water outside the
vacuole than inside.
2.
Nucleus
Name each tropism and state whether it is positive or negative.
A. Stem grows up
Negative Geotropism
B. Roots grow down Positive Geotropism
C. Plant grows toward light
Phototropism
D. A vine grows around a pole Thigmotropism
Equal amounts of water
inside and outside the
vacuole
3. What part of the plant reacts positive and which reacts negative in geotropism? Draw example for each.
Negative Geotropism-stems and leaves
Positive Geotropism- roots
4.
What is the stimulus that affects how a plant grows in geotropism, phototropism and thigmotropism?
Geotropism-gravity
Phototropism- light
Thigmotropism- touvh
5.
Name the 5 different forms of energy that we discussed in class, AND give an example of each.
Mechanical-running, Chemcal- food, Thermal- heat, Biomass-trash to was once alive es tree log
Light-radiant (electromagnetic waves)
6.
Identify the energy transformation in the following pictures.
7.
8.
Radiant
Chemical
Mechanical
Photosynthesis occurs in what organelle in the plant cell? (Hint: Chlorophyll is found here)
Chloroplast
Write the equation for Photosynthesis =
Energy
6 CO2 + 6 H2O
9.
C6H12O6 + 6 O2
Write the equation for Cellular Respiration =
C6H12O6 + 6 O2
6 CO2 + 6 H2O + Energy (as ATP)
Forces in Nature Review
10.
Geotropism refers to the roots of plant growing Down due to gravity.
11.
Turgor pressure is force exerted outward on a plant cell wall by the water contained in the cell.
12.
Phototropism is the way a plant grows or bends in response to light.
20.
The stems and leaves of a plant growing against the pull of gravity represent negative geotropism.
21.
The roots of a plant growing with the pull of gravity represent positive geotropism.
22.
In 2 – 3 sentences explain osmosis.
(In other words, explain how water got into the raisins after they had been soaked in water for several hours.)
Movement of water through a semi-permeable membrane into an area of higher solute concentration in an attempt to
equalize the concentrations of solute on both sides of the membrane.
Fill In Energy Pymramid and give examples.
Hawk
3rd Consumer/carnivore/Apex Predator
2nd Consumer/carnivore or omnivore
Lizard
Grasshopper
1st consumer/herbivore
Producer
Consumer Name
Source of Energy
Herring
Grasshopper; mosquito
Harbour Seal
Salmon; Herring
Marsh Hawk
Rat; Vole
Salmon
Grasshopper ; snail; Mosquito
Consumer Name
Source of Energy
Using the diagram, name 4 consumers with their source(s) of energy and put in table ABOVE.
Homeostasis is important to the survival of organisms. Explain why this is true?
Organisms need to be at a stable state of equilibrium so that the body can function and deal with the ever
changing environment.