Section 1.3 and 1.4

Question 1

When collecting data and doing experiments, what system of measurement do most scientist use?

Answer 1

The metric system

Question 2

What is the metric system?

Answer 2

A decimal system of measurement whose units are based on certain physical standards and are scaled on multiples of 10.

Question 3

1,000 meters equals 1 _________.

Answer 3

Kilometer

Question 4

One liter equals _______ mili liters.

Answer 4

1,000

Question 5

One gram equal _______ mili grams.

Answer 5

1,000

Question 6

1,000 kilograms equals 1 _________.

Answer 6

Metric ton

Question 7

When scientist collect data, what are they often trying to find out?

Answer 7

Whether certain factors changed or remained the same.

Question 8

What does a graph of data make easier to recognize and understand than a table of data?

Answer 8

The data may be plotted on the graph

Question 9

What are microscopes?

Answer 9

Scientific equipment

Question 10

What are compound light microscopes?

Answer 10

Allow light to pass through the specimen and use two lenses to form an image

Question 11

How do Chemical stains make light microscopes more useful?

Answer 11

They can show specific structures in the cell

Question 12

What are the two main types of the electron microscopes?

Answer 12

Transmission electron microscopes (TEM) and Scanning electron microscopes (SEM)

Question 13

Compare how a TEM and a SEM produce images.

Answer 13

TEM shines a beam of electrons through a thin specimen SEM scans a narrow beam of electrons back and forth across the surface

Question 14

How must samples be prepared for observation by an electron microscope?

Answer 14

They must be preserved and dehydrated before they are placed inside the microscope

Question 15

A group of cells grow in a nutrient solution from a single original cell is called a _______?

Answer 15

Cell culture

Question 16

What technique do Biologist use to separate one part of a cell from the other part of the cell?

Answer 16

Cell fractionation

Question 17

What is the single most important rule for your safety with working in a laboratory?

Answer 17

Always follow your teachers instruction and the textbook exactly

Question 18

Why do scientist need a common system of measurement?

Answer 18

Because scientist need to replicate each other’s experiments and most experiments involve measurements.