Grade 6 Science: The Cell and the Microscope

Vocabulary flashcards covering key terms, scientist contributions, microscope parts, cell theory, and basic cell components from the Grade 6 Science lecture.

Cell

The smallest unit of structure in the bodies of living organisms that performs essential functions for their survival.

Microscope

A device used to enlarge small objects that cannot be seen with the naked eye.

Modern Light Microscope

One of the most important types of microscopes used today in schools and scientific laboratories.

Ocular Lens

A lens with magnification power on a microscope used to view the sample on the slide.

Objective Lens

A lens mounted on a movable solid disk on a microscope, with each lens providing a specific magnification power.

Stage

The platform on a microscope used to place the slide on.

Light Source

The component of a microscope that provides light to view the slide clearly.

Coarse Adjustment Knob

A knob used to move the stage up and down to focus on the sample.

Fine Adjustment Knob

A knob used to clarify the fine details of the sample under a microscope.

Arm

The part of a microscope used to carry it.

Robert Hooke

The scientist who first observed cells under the microscope.

Matthias Schleiden

The scientist who concluded that plants consist of cells.

Theodor Schwann

The scientist who concluded that animals consist of cells.

Rudolf Virchow

The scientist who inferred that cells are produced from other similar cells through cell division.

Cell Theory

The theory stating that the cell is the basic unit of living organisms, all living things consist of one or more cells, and cells arise from existing cells through division.

Plasma Membrane

A thin outer layer surrounding the cell that protects it from external influences and contributes to the exchange of materials with its surroundings.

Cytoplasm

A semi-transparent, gel-like substance composed mostly of water and dissolved materials that fills the cell and contains various internal structures.

Genetic Material

The cellular component that carries hereditary information and controls cell activity.