The Need for Speed
This is the standard unit of measurement used for speed in science.
meters per second (m/s)
Unlike the Sun, the Moon does not make its own light; it is visible because it does this to the Sun's light.
reflects it
Sound waves are created when an object does this back and forth very quick.
vibrates
These two words describe what happens when you bring a North pole and a South pole of two magnets close together.
they attract (or stick together)
Unlike a permanent bar magnet, an electromagnet requires this to flow through it to turn its magnetism on.
an electric current (or electricity)?
If you know an object's speed and the time it traveled, you multiply them together to find this.
distance
This term describes materials like glass or clear plastic that allow light to pass straight through them completely.
transparent
This property of a sound wave determines its pitch (how high or low the sound is).
frequency
Name three common metals that are strongly attracted to magnets.
iron, nickel, and cobalt? (Accept steel as well)
Wrapping the wire around a piece of this metal core makes an electromagnet much stronger.
iron
A cyclist travels a distance of 60 meters in 12 seconds. This is the cyclist's speed.
5 m/s (Calculation: $60 \ 12)
This triangular piece of glass can be used to split white light into the colors of the rainbow.
prism
This unit is used to measure the frequency of a sound wave, equal to vibrations per second.
Hertz (Hz)
This instrument uses a tiny magnetized needle that points toward Earth's magnetic north pole to help people navigate.
compass
This is one major advantage an electromagnet has over a permanent magnet when used in a scrap metal yard to move cars.
it can be turned on and off? (Or its strength can be controlled)
If a car travels at a steady speed of 20 m/s for 10 seconds, this is the total distance it covers.
200 meters? (Calculation: 20x10)
According to the Law of Reflection, if a ray of light hits a flat mirror at an angle of 30°, it will bounce off the mirror at this exact angle.
30°
If you increase the amplitude of a sound wave, this is what happens to the volume of the sound.
it gets louder
This invisible area around a magnet gets weaker the further away you move from the magnet's poles.
magnetic field
Doing this to the wire coil will instantly increase the strength of an electromagnet.
adding more turns/loops to the coil
This type of graph features "Distance" on the vertical y-axis and "Time" on the horizontal x-axis, where a steeper line means a faster speed.
distance-time graph
This is the scientific term for a material, like tracing paper or frosted glass, that lets some light pass through but scatters it so you cannot see clearly through it.
translucent
Sound travels fastest through this state of matter because the particles are packed closest together.
solid
This rule states how magnetic poles behave when they interact with each other.
"like poles repel, opposite poles attract"
Besides changing the coil, this is another way to increase the power of an electromagnet.
increasing the electric current (or adding more batteries/voltage)