Cells and Organelles
What is the primary role of a Cell Membrane?
It separates the inside of the cell from the outside envionment.
What are the physical properties of water?
Colorless, Ordorless, Tasteless, high specific heat capacity, high heat of vaporization, surface tension, density and an ability to exist in solid, liquid and gas states.
What is Newtons first Law of Motion?
What is Newtons first Law also known as?
An object at rest will stay at rest and an object in motion will stay in motion unless acted on by an unbalanced force.
The law of inertia.
What causes Earth to have seasons?
The earth's tilt on its axl and its orbit around the sun.
What type of bond forms when two atoms share electrons?
a) Ionic bond
b) Covalent bond
c) Metallic bond
d) Hydrogen bond
Covalent bond
What is the primary function of the nucleus in a Cell?
It controls the cells center that stores genetic information (DNA) and it is in charge of cells activities, growth,maintenance metabolism and reproduction.
What is the chemical property of a substance?
flammability, toxicity, corrosiveness and reactivity.
What is Newton's second law of motion?
the acceleration of an object depends upon two things the net force acting on the object and the mass of the object.
During which season is the Northern Hemisphere tilted away from the Sun?
Winter
Which of the following is an example of an ionic bond?
a) Water (H₂O)
b) Sodium chloride (NaCl)
c) Oxygen (O₂)
d) Carbon dioxide (CO₂)
Sodium chloride
What organelle is found only in plant cells and is responsible for photosynthesis?
Chloroplast
What is a melting point?
The tempature when a solid becomes a liquid.
What is Newtons third law of motion?
For every action, there is an equal and opposite reaction.
What happens to the gravitational force between two objects if their mass increases?
The gravitational force between them also increase.
What happens to electrons in a covalent bond?
a) They are transferred from one atom to another
b) They are shared between atoms
c) They are absorbed by the nucleus
d) They are lost to the surrounding environment
They are shared between atoms.
What organelle is responsible for producing energy in the form of APT?
The mitochondria
What is a boiling point?
The tempature where a liquid changes into a gas.
What is inertia?
The tendency of a physical object to remain still or continue moving, unless force is applied.
What happens to the gravitational force between two objects if their mass decreases?
There gravitational force also decreases.
What type of bond occurs between metal atoms in a metal lattice?
metallic bonding
Explain the difference between a Cell wall and a Cell Membrane and why plant cells need both.
A plant cell needs both a Cell Membrane and a Cell wall because a Cell Membrane helps the cell with basic functions and a Cell wall provides structure and support. The cell membrane is a fine outer layer that controls what enters and exits the cell and a Cell wall is a rough outer layer that provides structure and support.
True or False, matter cannot be created or destroyed in any chemical or physical change according to the Law Of Conservation Of Mass?
True.
What are unbalanced forces?
Forces on an object that cause change in the motion of the object.
Why do we experience day and night?
Day and night occur because the Earth rotates on its axis, taking roughly 24 hours to complete one full rotation.
True or False Chemical bonds are only formed between atoms of different elements.
False