Cannon's Compounds
_________ is the measure of the amount of matter in an object. What units do we use on our digital scales for this?
mass, grams
What two things determine the strength of the force of gravity between two objects?
mass and distance
Thinking about the equipment (digital scale and graduated cylinder) we use, what are the two units that we use most often for density?
g/ml and g/cm3
The outcome factor that is measured in an experiment; the variable that may change in response to manipulations of the independent variable.
dependent variable
Equal forces acting on an object in opposite directions. Give one example.
balanced forces, answers will vary
_________ is the measure of the force of gravity on an object. What metric units match up with this?
The force of gravity on a planet’s surface, determined by the mass and the radius of the planet; a measure of weight.
surface gravity
Corn syrup, water and vegetable oil are poured into a graduated cylinder. Explain the order of the layers that these liquids form and why they end up where they do in the graduated cylinder.
Corn syrup (bottom) and vegetable oil (top) - they form layers according to density
The factor in an experiment that a scientist purposely keeps the same in order to determine the influence of the independent variable.
the control
Two or more forces that are not equal and opposite of one another; can cause change in motion. Give an example.
unbalanced forces, answers will vary
Any interaction that, when unopposed, will change the motion of an object.
force
The distance from the center of the planet’s core to the outer edge of its atmosphere.
planetary radius
An object is floating in a beaker filled with pure water, what is a possible density for the floating object.
Anything less than 1.0 g/ml
In a vacuum - a tennis ball, golf ball, bowling ball, and soccer ball are all dropped from a height of 2 meters at exactly the same time. What hits the ground first? Why?
The force of gravity pulls on objects equally, even if the masses are different. In a vacuum, there is no air to disrupt the experiment, so you get a true picture of how gravity acts on objects with different masses.
What did Kepler discover about the way planets orbited the Sun?
they followed an elliptical path
Is air resistance an example of a "contact force"?
yes
The average distance from the surface of the planet, through the central core to the outer surface.
planetary diameter
Under normal circumstances a raw egg will sink to the bottom of a beaker filled with water. What is one way to get the egg to float in the beaker?
Increase the density of the water by adding salt
The force required to accelerate 1 kilogram of mass at 1 meter per second per second. What does this describe?
A newton
What two forces keep objects in orbit?
gravity and inertia
What are two examples of a non contact force?
magnetic and gravitational
A relationship between mass and volume; how heavy something is for its size; generally describes how tightly matter is compacted in an object or planet
density
The factor in an experiment that is manipulated by the researcher; factor whose effect is being studied.
Motion of an object in an orbit around a fixed point
orbital motion
What is Newton's First Law of Motion?
An object in motion will remain in motion (and an object at rest will remain at rest) unless acted upon by another force