Describe the purpose of a hypothesis and the format used when writing one.
an educated guess of possible outcomes of an experiment based information you know, observations you have made
If, then, because . . .
100
What is a variable?
something that differs changes, or varies
100
What are multicellular and unicellular organisms. Explain their difference.
one has many cells while the other is made of a single cell
100
What is a cell? (needs to be word for word)
the basic unit of structure and function in an organism.
100
What is the most abundant chemical in cells?
water
200
What section do data tables go in?
Data and observations
200
What is the experimental group and what variable makes it the "experimental"?
The experimental group is the group that changes and that you compare to the control. The independent variable is what you change to test your hypothesis.
200
What does homeostasis do in the body? Give two examples.
helps maintain a constant internal temperature, water concentration, and gas exchange
200
What is development?
the process of change that occurs during an organism's life to produce a more complex organism
200
In a forest, living space is very important for trees because if they are too cramped they would die. For what do they compete?
sunlight, water, and minerals
300
In what FORMAT should a procedure be written?
A numbered step by step list.
300
What are the independent and dependent variables?
The independent variable is the characteristic you change on purpose in your experiment to test your hypothesis.
The dependent variable is the responding variable. It changes in "response" to the independent variable. Like a cause/effect relationship the dependent variable "depends" on the independent variable to cause it to change.
300
What are the two types of organisms? One that makes its food, and the other that cannot.
autotroph and heterotroph
or
producer and consumer
300
What is stimulus and response?
stimulus - a change in an organisms surroundings that cause the organism to react
response - an action or change in behavior that occurs as a result of stimulus
300
Give three examples of adaptations.
answers will vary
400
How do you write a conclusion?
Restate your hypothesis
Explain if your results did or didn't support your hypothesis (specific examples from data)
Explain what you would change if you did the experiment again.
400
What is the control group and what variable is NOT applied to it?
the group kept "normal" in order to be compared to the experimental group; the independent variable doesn't change it
400
What are the four needs of living things
water
food
living space
homeostasis
air
shelter
400
What was the mistaken idea that living things arise from non-living sources? Who was the scientist that proved this?
spontaneous generation and Francesco Redi
400
Why do living things need water?
helps keep the cells size and shape,
maintains a constant temperature,
moves needed materials around the body,
necessary in chemical reactions, and helps dissolve vital substances
500
What are the seven steps in the scientific method?
1. Identify a problem
2. Create a hypothesis
3. Design an experiment
4. Conduct the experiment
5. Collect and graph data.
6. Analyze data.
7. Draw conclusions
500
Explain the difference between quantitative and qualitative observations. What are the the "helpful" hints to remember each?
quantitative - data involving numbers, measurements, and quantities; N stands for numbers
qualitative - data involving description that is taken in through the five senses and cannot be expressed in numbers; L stands for looking
500
What are the six characteristics of living things?
have cells
use energy
respond to stimulus
grow and develop
reproduce
adapt
500
What is cellular organization?
the classification of unicellular and multicellular organisms and the organization of the cells within them
500
Name two biotic factors and two abiotic factors that affect reproductive potential