Unit 1 Biology Study Guide

What piece of equipment can not be used to transfer liquid from one container to another

petri dish

What piece of equipment can give you a precise measurement

graduated cylinder

What glassware is never used for making measurements

test tube

What is the difference between an observation and an inference

an observation is going to be a factual statement gathered using your five sense, which an inference is an educated guess or explanation based on those observations and past experience

Independence variable

what the experimenter will deliberately change or manipulate in the investigation

Dependent variable

what changes in response to the independent variable

Control

group used for comparison with your experimental groups, this is the “normal group”

Experimental group

groups that are being tested

Constants

the aspects of an experiment that are held constant/consistent

What is the difference between quantitative data and qualitative data? Give an example of each.

Quantitative data deals with numbers and quantities that can be measured or counted, while qualitative data describes description and qualities that can’t deal with numbers.

What is the difference between accurate and precise

Precision is how close your measurements are to each other, accuracy is how close your measurement is to the correct/accepted value.

What is the structure of a hypothesis? Write an example of a hypothesis.

“If (IV) then (DV)”. If students consume more caffeine, they will have more energy.

What is the smallest part of an element that still has properties of that element

Atom

How can life exist under frozen surfaces?

life can exist under frozen surfaces because ice floats and acts as a blanket, keeping the liquid below from freezing solid.

Oil is (hydrophilic/hydrophobic) and (polar/nonpolar)

Hydrophobic, non polar

What property of water makes it form a meniscus when in a graduated cylinder? Explain what it is

Water forms in a meniscus in a graduated cylinder due to adhesion, which works together with cohesion. Adhesion is basically the type of attraction that happens between two different molecules. Cohesion is the attraction between molecules of the same substance.

Give an example of one of water’s properties that make it “awesome”

One of water’s most incredible properties is high specific heat capacity.

What macromolecules make up the majority of the cell membranes structure.

lipids, specifically phospholipids

Sugars and starches are members of what group of macromolecules

Carbohydrates

What macromolecule does the body digest first if it is available

Carbohydrates

The macromolecule that most likely would be responsible for contracting muscles would be _________

Proteins

How do animals store most of their excess energy? Why?

Animals store most of their excess energy by lipids, they use these fats as long term energy.

Which macromolecule do we not obtain from food that we eat

Nucleic acids, specifically our DNA.

Your body consumes macromolecules for energy. In what order would your body consume them?

Carbohydrates, lipids, then protein

Fill in the table below