What is the location of elements with 2 electrons in their outer energy level?
100
Optics
What is the field of scientific study used to develop the first microscope?
100
The balloon became charged and was attracted to the opposite charge it induced in the wall.
What is the best explanation for why the balloon stuck to the wall?
200
Heat energy is transferred through Earth's mantle.
What is the best way to describe the cause of the movement of Earth's tectonic plates?
200
2 molecules H2O2 to 1 molecule O2.
What is the ratio of (H2O2) to (O2) in this reaction?
200
32 newton-meters.
What is the amount of work done if a 7-newton force is exerted over a 5-meter distance?
200
Location of an electron.
What is the feature described by probabilities on the could model?
300
Earth's axis tilts the northern hemisphere away from the sun.
What is the major cause of the winter season in the Unites States?
300
Calcium.
What is the element that will most likely act as a cation in an ionic bond?
300
A spring scale.
What is the instrument that would be best to use to measure the force required to lift an object?
300
Slightly down.
What is the direction a reflected ray will go if it strikes the top of a concave mirror?
400
White dwarf.
What is a star with very high temperature and very low luminosity?
400
Potential
What is the type of energy stored in chemical bonds?
400
20 newtons
What is the amount of force that must be applied to a stationary 10-kilogram object to accelerate it at a rate of 2 meters/second on a frictionless surface?