A pure substance that contains only one type of atom and cannot be broken down into simpler parts using chemical methods
What is an element?
100
The charge on an ebonite rod when it is rubbed with fur.
What is negative?
100
The use of Earth's resources, including land and water, at levels that can continue indefinitely.
What is sustainability?
100
This is the name of the theory to explain the origin of the universe.
What is the Big Bang Theory?
100
The smallest particle of an element that retains the identity of the element.
What is an atom?
200
The number of oxygen atoms in the chemical formula
3 Ca3(PO4)2
What is 24?
200
This is what happens when an acetate rod that has been rubbed with fur comes close to a negatively charged pithball electroscope.
What is they repel?
200
These include sunlight, air, temperature, water, wind and rocks.
What are abiotic factors in an ecosystem?
200
This type of radiation evidence for the BBT.
What is cosmic microwave background radiation?
200
A material that impedes the flow of electrons.
What is an insulator?
300
The name of the chemical group second from the left on the periodic table.
What are the alkaline earth metals?
300
This is what happens to other bulbs in a parallel circuit when a bulb in one branch goes out.
What is stay on?
300
A general name for the grasshopper in the food chain:
grass ---> grasshopper ---> frog ---> snake ---> hawk
What is herbivore or primary consumer?
300
This is what our sun will become when it "dies".
What is a white or black dwarf?
300
The variable that a scientist purposely changes to measure its effect.
What is the independent variable?
400
The number of valence electrons in an atom of barium (Ba)
What is 2?
400
The current through the first load in a series circuit as compared to the total current in the circuit (or the current through the battery).
What is equal or the same?
400
The process by which bacteria change unusable nitrogen into nitrates and other forms usable by plants.
What is nitrogen fixation?
400
This theory suggests that our solar system started from cloud of gas and dust that was left over from the supernova from a previous star.
What is Solar Nebula Theory?
400
The cycle that you breathing has the biggest impact on.
What is the carbon cycle?
500
The type of chemical bond that forms between Rubidium and Iodine.
What is an ionic bond.
500
The resistance of a load in a circuit that has a total current of 2.5 A and the load uses 10 V.
What is 5 ohms?
500
This would happen to the frogs if the number of snakes in the food chain below were suddenly increased.
grass ---> grasshopper ---> frog ---> snake ---> hawk
What is decrease in population.
500
The leftover remains of an extremely large star, with a mass, so large, that its gravitational pull affects light.