Friday, January 29, 2010

Plant Questions and Wordle:


1. What is a Vascular Plant?
- A Vascular plant is a plant that has lignified tissues for conducting water, minerals, and photosynthetic products through the plant.

2. What structures do all vascular plants share?
- Vascular plants share a similar set of structures called roots, stems, and leaves.

3. What are the roots designed to do?
- The roots are designed to pull water and minerals from whatever material the plant sits on, ex.)Water, soil or branches.

4. What are the two jobs of a stem?
- The two jobs of a stem are transporting food and water and acting as support structures.

5. What is the job of the xylem vessels?
- The Xylem vessels are connected end to end for the maximum speed to move water around. They also have a secondary function of support.

6. What does the pholoem transport?
- The phloem (cells) transport the sugars and other molecules created by the plant.

7. Inside leaves are organelles(tiney organs) called chloroplasts. Inside chloroplasts is a green substance called chlorophyll. What is the job of chlorophyll?
- The job of chlorophyll is that it captures the light from the Sun and start the whole process.

8. In photosynthesis, what molecules combine together to form what compounds?
- In photosynthesis Carbon dioxide and water combine with light (molecules)to create oxygen and glucose (compounds).

Thursday, January 28, 2010

Dessert Ecosystem:

1. Name the producers in the food web.
-Cactus Fruits and flowering plants.

2. Name all the primary consumers in the food web.
-Insects.

3. Name all the secondary consumers in the food web.
-Small mammals, eagles, coyotes, roadrunners, scorpions and lizards.

4. Insects eat a farmer's crop and this same farmer hates rattlesnakes. What would affects the food chain more? The farmer spraying an insecticide that kills all the insects or the farmer going out and shooting all the rattlesnakes he can find. Explans cain your answer.
- Killing all the insects will affect the foodchain more because in his ecosystem allthe insect can eat are his crops and all the rattle snakes can eat are nothing and if the farmer protects himself with long boots etc. he can be safe and still grow his crops with less ants to eat them, but it'll affect the food chain more.

5. A plant produces a seed that sticks to a coyotes fur to get transported away. What kind of relation is this? Mutulism, commensalism or predation. Explain.
- This type of relation is called Commensalism. This is because the two organisms in which one organism gains something but the other does not benefit or suffer harm.

Monday, January 25, 2010

Food Web in the Sagebrush-Steppe Ecosystem

Food Web in the Sagebrush-Steppe Ecosystem: (HW):

1. Who eats?
a. Plants? Primary consumers: Squirrels, insects and Pronghorn and other grazers.
b. Snakes? Badger (Carnivores) and Raptor (Large predators).
c. Insects? Lizards, small reptiles and Bats.
d. Mountain lions? No creatures.

2. This can effect the other orgasms in balance because there will be more carnivores, predators and insectivores because there will be less coyotes to eat which can also effect our environment in the balance.

3. The increase of Mountain lions can decrease the amount of other plant eaters and increase the amount of primary producers which could affect the balance of an ecosystem in the increases and decreases of many (different) creatures which can also bother human life styles and could be dangerous.

4. Mesquite trees might have man effects on the ecosystem because hidden in the manure were mesquite trees seeds that have been eaten before so the trees have spread throughout the American dessert southwest. They have lots of roots and are efficient at gathering water out of the soil that other plants cannot germinate. Another is the leaves are edible and produce seed pods that animals eat. Finally, they put nutrients back into the soil because of special nodules on their roots.

Sunday, January 24, 2010

Van Helmonts Experiment

1. Look up "Quantitative" then explain why this experiment is described as quantitative.
- This experiment was described as quantitative because Helmont's experiment involved measuring, taking data and being careful and accurate which is why it's described as quantitative

2. Write a hypothesis for this experiment as though you believed plants ate soil.
- I think if the plant was eating the soil that would make the soil weigh less because the soil is being eaten away and the plant will grow more, but the soil will weigh less.

3. 3. Explain whether or not your hypothesis was right. Give evidence from the story.
- The hypothesis was incorrect because plants don't eat soil and this was proven because of the weight loss in 5 years is a gram which is barely anything which means there are other possible reasons why the soil weighed less in 5 years.

4. In what ways did Van Helmont try to control the variables of this experiment?
- The plants get the same amount of water each day, that it gets no sunlight, that no insects go near it and that the temperature of the place doesn't change.

5. If plants really did eat soil, what would have happened to the weight of the soil at the end?
- The weight of the soil would be really different and much less than 1 gram.

6. What might of happened to the 0.1 kg of soil which was missing at the end?
- It could have dissolved, dropped of the pot or the weight could've been inaccurate either when first weighed or the second time in 5 years weighed.

7. Where do plants really get their weight from? (Which molecules?)
- Water, sugar, glucose, nutrients, sunlight(energy), carbon dioxide and etc.

8. If you were to do this experiment, what might you do to make it better? (What might you do more of, or measure, and why?)
- I would do different experiments like with different amounts of soil weighed, different amount of sunlight, with different amount of soil and also vary the time it is left to grow as well as the amount and maybe measure the weight of things more frequently