Earth science
The most abundant greenhouse gas
Water vapor
What is electricity?
Electricity is the flow of any particle with a charge - in the case of our household supply, it is the flow of negatively charged particles called electrons
What is the lightest element?
Hydrogen.
What is the purpose of a red blood cell?
To carry oxygen from the lungs to all parts of the body
The least abundant greenhouse gas
Nitrous oxide
What is radioactivity
Radioactivity involves the spontaneous decomposition of an unstable atomic nucleus into a more stable form, in one of three decays: alpha, beta, gamma
What is a ionic bond?
Ionic bonds form between two or more atoms by the transfer of one or more electrons between atoms
What is the purpose of a white blood cell?
To help the body defend against viruses and diseases?
What is the layer of gases surrounding the earth called?
The atmosphere
How do magnets work?
Which is the most reactive element?
How many chromosomes are in a human cell
23 pairs or 46
What does excess carbon dioxide do to the earth
Raises heat level
Which is more conductive? Metal or Water?
Metal is a better conductor if electricity.
What is a coavalent bond?
A covalent bond consists of the mutual sharing of one or more pairs of electrons between two atoms.
A basic unit of heredity passed from parent to offspring
What is photosynthesis?
Process in which plants convert sunlight energy into food and oxygen
What is an electrochemical cell?
An electrochemical cell is a device capable of either generating electrical energy from chemical reactions or using electrical energy to cause chemical reactions.
What is the rarest element?
Astatine
What is a eukaryote?
an organism consisting of a cell or cells in which the genetic material is DNA in the form of chromosomescontained within a distinct nucleus