Experimental Design
In an experiment, give an example of a constant.
Varies, but constants are things that stay the same during an experiment such as temperature, mass, tools used, etc.
What is the difference between an autotroph and a heterotroph?
autotrophs make their own food (plants)
heterotrophs have to eat food
What are the inputs of photosynthesis?
carbon dioxide and water
What is the simple form or building blocks of carbohydrates?
Simple sugars (glucose)
What is one difference between a plant and an animal cell?
1. Plants have cell walls for structure
2. Shape-plant cells are more angular while animal cells are more rounded
In an experiment, this is the variable that is measured or is the data being collected.
What is a dependent variable?
Who are at the base of an energy pyramid and have largest biomass in an energy pyramid?
Producers (plants)
what are the outputs of photosynthesis?
oxygen and glucose
What are amino acids the building blocks of?
Proteins
When a substance moves through a membrane from a high concentration to a low concentration.
What is diffusion
In an experiment, this is the variable that the experimenter is manipulating or changing.
What is an independent variable?
A species that is not native and that takes over or kills native species is called...
What is an invasive species?
what is the formula for cellular respiration?
O2 + Glucose = ATP + CO2 + H2O
What organic molecule includes fats?
lipids
When a substance moves from a low concentration to a high concentration and requires energy.
What is active transport?
In an experiment, why is it important to have a control group?
The control gives us something to compare to or a baseline.
How much energy is transferred from one tropic level to the next and where does the rest go?
10%- the rest is lost through heat
Give an example of a negative feedback mechanism in the body.
thermoregulation (brining the body back to baseline temp when hot or cold)
Regulating blood sugar with insulin & glucagon
What makes a molecule organic in science?
It contains carbon and hydrogen
What does it mean to be semipermeable and give an example?
A membrane that only lets a few things in and keeps others out
ex. window screen lets air in but not bugs
Give 3 characteristics of a good experiment.
1. large sample size
2. repeatable with similar results
3. many trials (3 or more)
4. clear purpose
5. limited variables
6. Clear steps that can be followed by someone else
Explain what ecological succession is and/or the order it goes in.
When a field or barren land returns to a forest over time.
Order: lichens/moss-grasses-shrubs-small trees-large diverse hard wood forest
Name 2 organ systems and explain how they work TOGETHER to help the body maintain homeostasis.
Answers vary
Is water organic or inorganic?
inorganic (it does not contain carbon)
What is the difference between a eukaryote and a prokaryote cell?
eukaryotes have a nucleus and are complex (plants and animals)
prokaryote have no nucleus and are simple (bacteria)