Chapter 1 & 2 Flashcards
What is the scientific method?
It involves a series of steps that are used to investigate a natural occurrence.
Why is a control group important?
A control group is exposed to the same conditions as the experimental group.
What is the basic unit of length?
Meter
What is the basic unit of mass?
The basic unit is gram
What is the basic unit of volume?
Liter
What is the metric system?
A decimal system of measurement whose units are based on certain physical standards and are scaled on multiples of 10.
How do light microscopes produce magnified images?
They focus visible light rays.
How do electron microscopes produce magnified images?
They focus beams of electron.
About how many times can a light microscope magnify?
About 2000 times.
What two types of electron microscopes are there?
Transmission E.M.(TEM) and scanning E.M(SEM)
What are covalent bonds?
Covalent bonds involve the sharing of one or more electrons.Covalent bonds are very strong.
What is a monomer?
Small unit that can join together with other small units to form polymers.
What are polymers?
Large compound formed by combinations of many monomers.
What is the PH scale?
-measurement system used to indicate concentration of Hydrogen ions.
What is a lipid?
Macromolecule made from CO2 and hydrogen atoms,includes fats,oils,and waxes
