If an object travels 20 meters in 25 minutes, what is the average speed?
2 meters/minute
100
If the forces are balanced, than the object does what?
Doesn't move
100
What atomic particle (electron, proton, or neutron) is the farthest from the center of the atom?
Electron
100
What form of energy is released or absorbed in MOST chemical reactions
a. light energy
b. electrical energy
c. sound energy
d. heat energy
d. heat energy
100
A galaxy is best described as a cluster of
Billions of stars
200
Velocity is speed with...
direction
200
A piece of pine wood floats on the surface of a lake because the water exerts an upward force that is equal to what?
Weight of the displaced water
200
When Mg metal is burned in the presence of O2, MgO is produced. The properties of MgO are different than Mg and O because MgO is a
a. solution
b. compound
c.mixture
d. element
b. compound
200
When does the arrangement of molecules change?
When the molecules change state
200
To express the distance between the Milky Way galaxy and other galaxies, the most appropriate unit of measurement is
Lightyears
300
What characteristic of motion could change without changing the velocity of an object? a. Speed b. Position c. Direction d. Acceleration
b. Position
300
A ball is dropped form the top of a tall building. As the ball falls, the upward force of air resistance becomes equal to the downward pull of gravity. When these two forces become equal in magnitude, the ball will a. flatten dues to forces b. fall at a constant speed c. continue to speed up d. slow to a stop
B. Fall at a constant speed
300
What class of elements best conducts electricity?
Metals
300
On the pH scale, a number from 0 to 6.9 is for a ____________ solution.
Acidic
300
Which of the following sets contains only objects that shine as a result of reflected light?
a. moons, planets, comets
b. moons, comets, stars
c. planets, stars, comets
d. planets, stars, moons
a. moons, planets, comets
400
If a time and distance graph shows a line that is parallel to the X axis, this shows that the object is a. accelerating b. moving at a constant speed c. not moving
c. not moving
400
If there is a 3 N force going downward and a 3 N force going upward, what can you conclude about these forces? a. They are the same because they are acting on the same object. b. they have different magnitudes c. They are different because they have different directions
C. They are different because they have different directions
400
In a comparison of metals to nonmetals, metals tend to have
a.lower melting points and greater conductivity than nonmetals
b. lower conductivity and lower density than nonmetals
c. higher density and lower melting points than nonmetals
d. greater conductivity and high melting points than nonmetals
D. Greater conductivity and high melting points than nonmetals
400
Which compound is most likely to be part of living organisms?
a. C6H12O6
b. BF3
c.MoCL2
d. CsI
a. C6H12O6
400
Which of the following is not a classification used to describe galaxies?
a. spiral
b. irregular
c. symmetrical
d. circle
d. circle
500
Which of the following is an example of velocity?
a. 3 m/s
b. 100 seconds
c. 5 km/s north
d. 300 meters
c. 5 km/s north
500
A force of 5 N is required to increase the speed of a box from a rate of 1.0 m/s to 3.0 m/s within a level surface. What change would most likely require additional force to produce the same results?
a. increase the mass of the box
b. decrease the mass of the box
c. make the surfaces of the box smooth
A. increase the mass of the box
500
What do the elements sulfur, nitrogen, phosphorus, and bromine have in common?
They are nonmetals
500
Burning wood is an example of what type of reaction