Chemistry
This reactive two atomed molecule makes up 21% of the atmosphere and is essential for cellular respiration in animals.
What is oxygen or O2?
This type of biomolecule is responsible for containing the blueprint for an organism, and is found in the nucleous of eukaryotic cells.
What is DNA?
This trophic level contains many plants that take energy from sunlight and put it into sugars that other species may eat.
What are producers?
This astronomical body is small relative to the earth, yet its gravity is still one of three key influences over the ocean tides.
What is the moon?
Though this unit's name contains a measure of time, it is actually a unit of very, very large distances.
What is a lightyear? (or light___)
This atom was first formed 240,000-300,000 years after the big bang and still makes up around 90% of all atoms in the universe.
What is hydrogen?
When "4x" is selected on a microscope, the 10x eyepiece and 4x usually combine to this magnification.
What is 40x?
This process results in different species that are better at a specific method of survival, but never reaches a "perfect" species.
Gaia is the greek godess of this planet, third from the sun.
What is Earth?
An order of magnitude is quick and easy way to determine scale by mutliplying or dividing by ten. That means this number is two orders of magnitude above 5.
What is 500?
This type of reaction is known for releasing lots of energy, CO2, H2O, and is what powers many cars. It was also shown with the whoosh bottle experiment.
What is combustion?
This critical part of all cells is the barrier between the inside and outside of a cell.
What is a membrane?
Parts of the ecosystem can be important like a river or a cliff face, but are not alive. This term refers to these non living parts.
What is an abiotic factor?
Despite still being easily visible from earth, this entirely seperate galaxy is still 2,500,000 light years from earth which is the closest of any other galaxy.
What is Andromeda?
It would take about 31 years of counting non stop to reach this number.
What is a billion?
This life depended element, number 12 on the periodic table, has four valence electrons meaning it can form many bonds and tie large molecules together.
What is carbon?
This biomolecules makes the machinery of a cell. Lots of it can be found in foods like meat, nuts, and beans and is important for things like muscle growth.
What is protein?
This prefix is used to means "human", and when followed by -pogenic means "human generated".
What is anthro?
This special range of distance from a star gives planets just enough energy to have liquid water without boiling, and is what astronomers look for as a sign that life may be possible on other planets.
What is the goldilocks zone?
Humans have existed for this percent of the history of life on earth, rounded to the nearest whole percent.
What is 0%?
This feature of an atom is often shown like a solar system, and is where electrons are found.
What is an orbital?
This kingdom of life is made up entirely of single cell prokaryotes, and is often seen as harmful even though the majority of species are not dangerous to humans.
What are bacteria?
These species are considered extra important to an ecosystem, as most of the other species rely on them in some way. Removing this type of species would cause the ecosystem to collapse.
What is a keystone species?
Commonly used in navigation, the star Polaris commonly goes by this name.
The approximate age of the universe is this.
What is 13.8 billion years?