CELL THEORY
Cell theory states that all living organisms are composed of?
CELLS
rue or False: The thermosphere is the hottest layer of the atmosphere.
What is True?
This organ system is responsible for providing structure and support to the body, protecting internal organs, and enabling movement.
SKELETAL SYSTEM
This type of cell lacks a nucleus and other membrane-bound organelles.
PROKARYOTIC
True or False: All atoms of the same element have the same mass.
What is True?
In cell theory, cells are considered the basic unit of what?
living organisms?
This is the layer of the atmosphere closest to Earth's surface where weather occurs.
What is the troposphere?
Name two organs in the respiratory system.
What is the lungs, trachea, bronchi, or diaphragm?
Plant cells are surrounded by a hard outer shell called what?
Cell wall
What is the name of the central part of an atom, which contains protons and neutrons?
What is the nucleus?
The third part of cell theory states that all cells come from
PRE-EXISTING CELLS
The ozone layer, which helps protect life on Earth by absorbing harmful ultraviolet radiation from the Sun, is found in this layer of the atmosphere.
What is the stratosphere?
This system is responsible for breaking down food into nutrients that can be absorbed by the body.
What is the digestive system?
Cells are surrounded by a protective barrier called what?
What is the cell membrane?
This subatomic particle has a positive charge and is found in the nucleus of an atom.
What is a proton?
True or False: According to cell theory, viruses are considered living organisms because they are composed of cells.
FALSE
This is the third layer of the atmosphere, where temperatures start to decrease with altitude, and meteors often burn up upon entry into the atmosphere.
What is the mesosphere?
Name two organs in the excretory system.
What is the kidneys, bladder, ureters, or urethra?
What is the control center of the cell that contains the genetic material?
What is the nucleus?
This subatomic particle has a negative charge and orbits the nucleus of an atom.
Electron
This scientist is often called the "Father of Microbiology" and is credited with discovering cells in cork using a microscope.
Who is Robert Hooke?
Name all five layers of the atmosphere in order from the earth to space
Troposphere, stratosphere, mesosphere, thermosphere, and exosphere
What is the main function of the circulatory system?
What is transporting nutrients, oxygen, and hormones to cells, and removing waste products from cells?
This fluid-filled organelle stores water, nutrients, and waste products in plant cells.
What is the vacuole?
The atomic number of an atom tells you the number of what subatomic particle?
What are protons?