Microscope and advanced techniques

Micro means = ____________ and scope means = ____________

• Small; to look at

• Large; to ignore

• Tiny; to observe

• Huge; to overlook

Why did the microscope accelerate the development of the Cell theory?

• It allowed for the observation of cells at a microscopic level

• It made cells larger

• It changed the color of cells

• It destroyed cells

What do electron microscopes use instead of light?

• Sound waves

• A beam of electrons

• Water

• Heat

What is the purpose of scanning electron microscopes (SEM)?

• To show the cell's internal structures

• To show the cell's surface

• To change the cell's color

• To enlarge the cell

What is the purpose of transmission electron microscopes (TEM)?

• To show the cell's surface

• To show the cell's internal structures

• To change the cell's shape

• To shrink the cell

Tags

NGSS.MS-LS1-2

An ultracentrifuge is used to separate particles based on their __________.

• color

• density and size

• shape

• temperature

The ultracentrifuge works by spinning samples at __________ speeds.

• low

• moderate

• high

• variable

Tags

NGSS.MS-PS3-1

Ultracentrifuges create powerful __________ forces.

• gravitational

• magnetic

• centrifugal

• electrical

Ultracentrifuges are used for the isolation of __________.

• carbohydrates

• lipids

• proteins and nucleic acids

• vitamins

The process of ultracentrifugation causes heavier components to __________.

• float

• dissolve

• evaporate

• move to the bottom