Chemistry
The gas usually filled in the electric bulb is .....
Nitrogen
What are the primary colors of light?
Red, blue, green
What is the term for the process by which cells engulf large particles or other cells by wrapping their cell membrane around them?
phagocytosis
Which scientist believed that in freefall a heavier object falls at the same rate as a lighter object?
Galileo Galilei
What does DNA stand for?
Deoxyribonucleic acid
An H+ ion is comprised of one subatomic particle. What is the name of the subatomic particle?
Proton
The electromagnetic spectrum is divided into smaller spectrums such as X-ray and ultraviolet. Tell 2 others of such small spectrums.
Infrared, visible light, radio, microwave, gamma rays
What term describes the genetic makeup of an organism, while its observable traits are referred to as the phenotype?
genotype
In 1876, this Scottish Engineer invented the first phone.
Alexander Graham Bell
Organic chemistry is the study of the compounds that make up living organisms. All organic molecules contain:
Carbon and hydrogen
What is the most common isotope of Hydrogen?
Protium
A TV takes in 600J of electrical energy and gives out 300J of light, 240J of sound, and 60J of heat energy. What is the energy efficiency of this TV?
90 percent
What is the role of decomposers in an ecosystem, and how do they contribute to nutrient cycling?
They are breaking down dead organisms and organic matter, returning essential nutrients to the ecosystem.
In 1820, a French physicist and chemist discovered electromagnetism. He gave his name to the unit of electric current.
Andre-Marie Ampere
Chlorophyll is a naturally occurring chelate compound in which central metal is .....
Magnesium
What is the mixture of potassium nitrate, charcoal, and sulfur?
Gunpowder
If you increase the distance between objects by 2 times, by how many times will their gravitation attraction decrease?
4 times
Name the four chambers of the human heart and explain the direction of blood flow through them during a complete cardiac cycle.
the atria (left and right) and ventricles (left and right), and blood flows from the atria to the ventricles, then to the lungs or the rest of the body, and back to the atria.
Who is the father of Modern Chemistry?
Antoine Lavoisier
Why Does the Planet Uranus, Rich in Methane and Hydrogen, not Burn?
Not enough oxygen
What is the Hardest Chemical in Your Body?
Enamel, is the external tissue that covers teeth.
An 8-kg object is raised by a crane to the top of a building 20 meters in height. If it takes 50 seconds for the object to get to the top of the building, then how much power is needed?
32 watts
In the context of evolution, what is the term for the process by which species gradually develop and adapt to their environments over time?
natural selection
Who is the author of "A Brief History of Time"?
Stephen Hawking
Name all the planets in our solar system with no moons.
Mercury and Venus