Biology
It is the most common element in the human body... A: Carbon, B: Hydrogen, C: Oxygen, D: Calcium
What is C. Oxygen. It makes up almost 63% of the average human. Following, are major elements and the percentages of the human body that they represent: Oxygen- 62.81% Carbon- 19.37% Hydrogen- 9.31% Nitrogen- 5.14% Sulfur- 0.64% Phosphorus- 0.63% Other- 2.10%
The Electromagnetic wave that has the longest wave length A: Radio waves, B: Gamma rays, C: Infra red, D: Microwaves
A. Radio waves have the longest wavelength and the lowest frequency of the entire Electromagnetic spectrum
This type of matter has a definite volume but no definite shape... A: Solids, B: Liquids, C: Gases, D: Plasma
What is B: Liquids. Liquids have a definite volume but no definite shape. Because the intermolecular forces are weak in a liquid, it is able to change its shape to conform to its container.
The gradual change in the characteristics of a species over time
What is evolution?
Beta is a type of ionising radiation, what are the other two types? A: Omega and Alpha, B: Alpha and Delta, C: Gamma and Pi, D: Alpha and Gamma
D: Alpha and Gamma are the other two types of ionising radiation
These substances increase the rate of chemical reactions A: Reactants, B: Catalysts, C: Isotopes, D: Cathodes
B: Catalysts. Catalysts are substances that increase the rates of chemical reactions by reducing the activation energy.
Breeders select two parents that have desirable characteristics to reproduce, yielding offspring with those desired traits
What is selective breeding?
What is half-life? A: the time taken to get half way to the sun, B: half of the time it takes for radioactivity to reduce, C: the time taken for the radioactivity to fall to half of it's original value
C: half life is the time it takes for radioactivity of a substance to fall to half of it's original value.
Iodine-131 has a half life of 8.1 days
An atom of an element that has lost or gained electrons to become charged
What is an ion?
This was the first genetically engineered organism. A: Corn, B: Tobacco, C: Sheep, D: Rat
What is a B. tobacco plant. In 1983, a tobacco plant, designed to be resistant to certain herbicides, was grown in Wisconsin.
______________ is measured in Ohms
Resistance
The simplest ratio of atoms present in a chemical compound
What is empirical formula?
A disease that cannot be transmitted by someone who already has the disease (E.g. cancer or lung disease)
Non-communicable disease
A measure of the flow of electrons through a circuit
What is current?
A bond that occurs between two non-metallic elements and involved sharing electrons
Covalent bond