In a chemical reaction the mass of the reactants (the substances you start with) is always _______________ to the products (the substances you end up with).
What is equal?
100
The law of conservation of energy says that energy cannot be ______________ or _____________, only _________ into other kinds of energy.
What is created, destroyed, and transformed?
100
The distance between one crest and another on a wave is called the ____________.
What is wavelength?
100
If one person pushes a box with 10 N of force to the right and another person pushes a box with 20 N of force to the left, the resultant force would be ___________.
What is 10 N to the left?
100
You can tell if a cars acceleration is negative if it ________.
What is slows down or decelerates?
200
An atom is the smallest particle of an ________.
What is element?
200
Energy from a light bulb is transformed from __________ to _____________.
What is electrical to light?
200
If all of the air is taken out of a container and a bell is put inside, you would not be able to hear the bell ring because there is no _______________.
What is medium?
200
A pair of scissors uses a __________ and a ___________. These are two simple machines that make work easier.
What is lever and wedge?
200
When a carousel is in motion, the movement of the carousel horse can BEST be described as __________.
What is acceleration or change in velocity?
300
H2O, NH3, and NaCHO3 are all ___________.
What is molecule or compound?
300
A parallel circuit is created with three light bulbs. If a fourth light bulb is added, then the brightness of the bulbs would ____________.
What is stay the same intensity?
300
A leaf on a plant appears green because most colors are ______________ and only green is _____________.
What is absorbed and reflected?
300
Jeff is a landscaping contractor and lifts a rock weighing 600 pounds by wedging a board under the rock. Jeff weighs 150 pounds and puts all of his weight on the lever. Find the mechanical advantage by dividing the output force by the input force.
What is 4?
300
In a bumper car arena, two cars of equal mass are heading straight toward each other. The orange one is traveling at a speed of 5 m/s. The green one is traveling at a speed of 2 m/s. After the collision, both cars move off in the direction of the orange car with a velocity of 1.5 m/s. _______ car has a greater velocity.
What is neither because they change to the same speed?
400
This phase of matter has the most kinetic energy.
What is gas?
400
If you rotate a copper wire between two magnets you would create ________________.
What is an electrical current?
400
In old western movies cowboys sometimes listen for a train by putting their ear to the tracks because sound travels faster in a __________ where the molecules are close together rather than a _________ where the molecules are far apart.
What is solid and gas?
400
A planet similar to Earth has four moons roughly the same distance away. The moon that will MOST affect tides on the planet is the one that has the greatest _____.
What is mass?
400
As a roller coaster goes down a hill energy is transformed from ___________ to __________.
What is potential to kinetic?
500
water freezing to form ice
melting a gold chain to create a gold ring
breaking a window into smaller pieces
These are all examples of _____________.
What is physical changes?
500
_____________ is the type of heat transfer that requires objects or atoms to be touching or have direct contact.
What is conduction?
500
This kind of wave does NOT require a medium.
What is electromagnetic? (radio, microwave, infrared, visible light, ultraviolet, x-rays, and gamma rays).
500
Farmer Bob decides to use a compound pulley to raise a box up to the top of his barn. The purpose of using this machine is to reduce __________.
What is force needed to lift the box?
500
When a circuit is open the parts will not work because _____________.