Nature of Science
What is science?
The systematic study of the natural world through observation and experimentation
What is the independent variable in an experiment?
The variable that is changed or manipulated by the scientist.
Name one property of water
Adhesion, cohesion, terrific solvent, high specific heat, less dense as a solid.
Name the monomer of carbohydrates.
Monosaccharides
Which macromolecule is used first for energy by the body?
Carbohydrates
Give an example of a hypothesis in the correct format.
Responses may vary
What is the dependent variable?
The variable that is measured or observed.
What is a polar molecule?
A molecule with an uneven distribution of charges, having positive and negative poles.
Name one function of proteins.
Enzymes, structure, hormones, transport, antibodies.
Which macromolecule stores the most energy long-term?
Which macromolecule stores the most energy long-term?
Differentiate between an observation and an inference.
An observation is something you see, hear, or measure; an inference is a conclusion drawn from observations.
Give one example of a controlled variable.
Examples: same type of plant, same amount of water, same room temperature.
What does high specific heat mean?
It means that it takes a greater amount of energy to heat or cool water compared to other liquids.
What is a polymer?
Made of monomers, more complex subunit
Which macromolecule is never broken down for energy?
Nucleic Acids
Explain the difference between accuracy and precision.
Explain the difference between accuracy and precision.
What is the difference between the experimental group and the control group?
The experimental group receives the variable being tested; the control group does not.
Why is water essential for life?
Water’s properties allow it to dissolve substances, regulate temperature, and support chemical reactions in cells.
Which macromolecule forms the majority of the cell membrane?
Lipids (phospholipids)
Why is it important to balance carbohydrates, proteins, and fats in your diet?
Each macromolecule has a specific role in energy, growth, and cell function; imbalance can affect health.
The target is 12 ft. The measurements are 11.9 ft, 12 ft, and 11.8 ft. True or False: These measurements are precise but not accurate.
False
If a scientist changes the amount of water plants get to see how it affects growth, what is the independent and dependent variable?
IV=amount of water
DV=growth
Name a property of water and explain how it helps living things survive.
Cohesion/adhesion → moves water in plants; high specific heat → stabilizes temperature; good solvent → dissolves nutrients
What is the purpose of nucleic acids?
Store genetic information like DNA and RNA
If a person doesn't eat for 2 days, what macromolecule will they depend on to give them long term energy?
Lipids