Test 1- Biomass Flashcards
What is Biomass
Biomass is the dry mass of a living ot recently living being
How do we use biomass in out daily life?
- food
- medicine
- wood
What was Van Helmont’s experiment? Explain.
Helmont planted a 5 pound tree. He dried the soil and only added water for 5 years. When he finished his experiment he saw that there was no gain in weight except 2 ounces ( which he did not take into consideration) and thought that all a plant matter is is made by water. But now we know that a plant also needs minerals.
What could Van Helmont do to improve/ take precautions for his experiment?
Improve- more samples, more time
Precautions- make sure dust cant get into the soil
What minerals r they needed for a plant to grow healthy?
Nitrate- protein
Phosphate- for dna and cell membranes
Magnesium- chlorophyll
What is a pest?
A competitive animal that consumed our crops, our food
What r pesticides?
Chemicals that kill pests
What is one big problem caused by pesticides?
Bioaccumulation - pesticides get washed down to the river; animal consumes it; accumulated in food web; tertiary animal/ top predator has the most pesticides; harm its eggs
Advantages of pesticides
Kills pests
Doesnt harm crops or mammals
Stops diseases like malaria cause by pests
Disadvantages of pesticides
Build up in food web
Pests can grow resistance
Kills essential bugs like bees
Poison water
What is photosynthesis ( formula)?
Carbon dioxide+water=( light and chlorophyll) biomass ( glucose or starch) + oxygen
Photosynthesis can’t happen without ⬆️
What is starch?
Starch is a polymer or glucose
Iodine turns black where starch is. Starch is only on the green part of the leaf
Describe a food web
Plant- producer
Herbivore - primary consumer
Carnivores- secondary consumer
Top predator- tertiary consumer
What is a pyramid of numbers
It can have an irregular shape. Counts the producers and consumers . Ex: one oak tree can feed a lot of caterpillars ( small block for tree, big for caterpillars)
What is a pyramid of biomass?
It measured the producers and consumers. Always the same size
