Cells
Which statement best describes cell theory?
Cell are the basic unit of structure for all organisms, and all cells come from existing cells.
How did Mendeleev arranged his periodic table in order of increasing atomic number?
By the mass number
A bird that eats fruit, seeds, and insects is a _______?
An omnivore
A _____ is an atom or group of atoms that has an electric charge.
Ion
Newton's second law of motion states that an object's acceleration depends on its ____________ and on the net force acting on it.
Mass
What function do both cell membranes and cell walls perform
Allows substances to move in and out of cells.
The rows in the periodic table are called periods?
true or false
True
Raw materials are returned to the environment for other organisms to use by ________?
Decomposers
What ions are made of more than one atom?
Polyatomic atoms
Acceleration is measured in ________.
Meters per second
Which organelles are NOT found in animal cells?
chloroplasts
The modern periodic table is arranged in order of increasing by the?
Atomic number
A ________ cannot make its own food.
Consumer
In an ionic compound, the total positive charge of all the positive ions ________ the total negative charge of all the negative ions.
Equals
The smaller the mass of an object, the _______ its inertia.
Less
Ribosomes make __________?
Proteins
On the periodic table, the elements in the same ______ have similar properties.
column
Water and food are examples of __________ for populations.
Limiting factors
Because the force of attraction between the positive and negative ions is so strong, ionic compounds have _________ melting points.
High
Force is measured in an unit called the ________.
Newtons or Kilograms times meters per second
What are the levels of organization of cells?
Cell, Tissue, Organ, Organ System, Organism
Group 1 is known as the _________ metals.
Alkali
A flood that covers a meadow and drowns animals and a late frost that kills young plants are examples of how ___________ can affect the size of a population.
What type of charge do ionic bonds have when they form between two ions?
Opposite charge
Newton's first law of motion states that an object will not experience a change in motion unless acted upon by a(n) _________ force.
Unbalanced