Scientific Method
Identifying variables
Characteristics of Life
Homeostasis
Random
100
the first thing a scientist does
make observations using their 5 senses
100
A student wanted to test how the mass of a paper airplane affected the distance it would fly. Paper clips were added before each test flight. As each paper clip was added, the plane was tested to determine how far it would fly.
identify the independent variable
mass of the paper airplane
100
at what level of organization does life begin?
cell
100
Explain how a negative feedback loop works
opposes the stimulus to return the body to a state of homeostasis
100
broadest to most specific categories of classification in the correct order
domain, kingdom, phylum, class, order, family, genus, species
200
what is a hypothesis
a suggested, testable explanation to a problem written in an if...then... statement
200
Homer notices that his shower is covered in a strange green slime. His friend Barney tells him that coconut juice will get rid of the green slime. Homer decides to check this out by spraying half of the shower with coconut juice. He sprays the other half of the shower with water.
What is a hypothesis for this situation?
if you use coconut juice on green slime in your shower then it will get rid of it completely
200
identify the characteristic described.
parents went in for their 6 month ultrasound and they could see their baby was the size of a melon and was showing distinct features
growth and development
200
positive feedback mechanism does what to the stimulus
amplifies it
200
what information can we gather from the scientific name of an organism
genus and species
300
explain the purpose of controlled variables in an experiment
to isolate the variable you are testing to be sure the results/changes are from one variable
300
the lemon trees receiving the most water produced the most lemons
what is the dependent variable
number of lemons produced
300
identify all 3 characteristics
The snake is an exotherm so he laid out in the sun during a warm day as he digested his dinner from the night before until a person walked by and he slithered away into the bushes
- maintaining homeostasis
-obtain/use energy
- responding to environment
300
what is the goal of homeostasis. be specific
maintain balance and ideal internal conditions to ensure survival
300
what is the genus of Haliaeetus leucocephalus
Haliaeetus
400
the two types of data you can collect from an experiment to determine if your hypothesis should be accepted or rejected
give one example of each
qualitative and quantitative
400
You want to see if beans soak up different liquids at different rates. You put beans in a cup with regular water, soapy water, salt water and sugar water. After 24 hours you return to measure the mass of the beans to see how much liquid they absorbed.
What is the independent variable, dependent variable and control group.
I: type of liquid
D: amount of liquid absorbed
CG: beans in the regular water
400
why do living organisms need energy
to carry out all of the cellular processes necessary for life
400
brings the body away from homeostasis/the start of a feedback loop
stimulus
400
how do scientists classify living organisms
by similarities [how similar they are to each other]
500
for an experiment to be considered "good" or "valid" what must you be able to do with it
retest and get similar data each time
500
The amount of pollution produced by cars was measured for cars using gasoline containing different amounts of lead.
What is the independent variable and the dependent variable
I:amount of lead in the gasoline
D: amount of pollution produced
500
asexual reproduction
500
role of the control center in maintaining homeostasis
receive information from the sensors, interpret the information, decide if action must be taken and then send a signal to the appropriate effectors
500
a collection of hypotheses that have a lot of support from a lot of data. evolve over time as scientists gather more data
theory
600
explain the difference between the control group and the experimental groups in an experiment
the control group does not receive the treatment
the experimental group receives the treatment
600
in an experiment you are trying to determine how baking temperature affects the height of a cake.
I: baking temp
D: cake height
CG: cake baked at the recommended temperature
EG: cakes baked at higher/lower temperatures
600
name all 8 characteristics of life
1. made of cells
2. contains DNA
3. maintains homeostasis
4. responds to environment
5. reproduces
6. evolves/adapts
7. growth and development
8. obtain/use energy
600
identify the stimulus, sensor, and effector in this situation.
stimulus:change in calcium levels
effector: parathyroid gland
600
what is the difference between a scientific theory and a law
a theory can turn into a law with more research