Unit 1:
How we do science
How we do science
What are the factors of an independent and dependent variable?
Independent: Something you change on purpose
Dependent: Something you measure
What are keystone species?
An animal that is an integral part of the eco system and it keeps all the other animals in check.
What is evolution?
the process of organisms changing over time
What are the parts of a CER?
Claim, Evidence, and Reasoning
Ecology
The branch of biology that studies how organisms interact with their enviroment and other organisms
What are the three different types of graphs that we use, and why use them?
Bar graph: Use when there is non numerical data
Line graph: Use when the independent variable affects the dependent, and to show change over time
Scatter plot: Use when data shows a relationship or correlation between 2 numerical values
What are the different levels of a trophic pyramid?
(bottom to top)
Producers, primary consumers, secondary consumers, tertiary consumers
What is natural selection?
It is the process that sorts out the winners and losers in an ecosystem. It is not random.
What is a star?
A star is a huge sphere of very hot, glowing gas
Biotic and abiotic
Biotic- is/was alive
Abiotic- has never been alive
What are the different pre fixes for the metric system?
(biggest to smallest)
Giga (G), Mega (M), Kilo (K), Centi (c), Milli (m), Micro (μ), Nano (n)
What do the arrows in a food web represent?
The flow of energy
What is Adaptation?
Any heritable trait that helps an organism survive and reproduce in their environment
What are stars made of?
Gas made up of hydrogen and helium, which are the two lightest elements.
Fitness
an organisms ability to survive and prouduce offspring
What are the two different types of microscopes?
Dissecting and compound light microscopes
Why is the carbon cycle important?
Co2 is a necessary part in production in plants
What are cladisistics?
The method of grouping orangisms based off their characteristics to infer their revolutiionary relationships
What is nuclear fusiom?
A process that allows stars to produce their own light. When lighter elements are forces to become heavier elements
Phenotype
Physical characteristics and an individuals observable traits such as eye color and height
At least how many trials do you do when doing an experiment?
3
What are the differences and similairites in eukaryotic and prokaryotic cells?
Differences: Prokaryotic: no nucleus, no membrane bound organelles, while eukaryotic cells do.
Similarities: they both have DNA(no nucleus), cytoplasm, ribisomes, cell membrane
What is a derived character?
Trait that arose in the most recent common ancestor of a particular lineage and was passed along to its descendants.
What gappens after a star runs out of fuel?
It ejects material back into space
Accuracy and Precision
Accuracy: How close something is to a target or the actual value
Precision: How consistent results are regardless of target or actual value