1
What happens to the speed of light when it moves from a gas to a solid?
It slows down (remember waves travel fastest through a gas and slowest through a solid)
If someone is tapping their pencil on a glass of water, would the sound waves travel the fastest through the glass, the surrounding air, the water in the glass, or the water vapor?
the glass (remember sound requires a medium to travel through and tighter packed molecules of a solid allow for a more vibration)
What type of substance would have a pH of 4?
an acid
Is white light truly white?
No, white light is composed of a spectrum of many different colors.
Name the longest and shortest visible colors.
Red is the longest and violet is the shortest (think about your rainbow Roy G Biv)
If a wave has a long wavelength, it will have a low frequency. True or False?
True (remember the longer the wavelength the lower the frequency - think about the rabbit and the turtle)
Why would you see fireworks before you hear them?
sound travels slower than light/light travels faster than sound
Which of these; color, density, pressure, or temperature of a substance does not change how fast sound will travel through the material?
color (remember density, pressure, and temperature will impact how fast the waves can travel)
Why is it the electromagnetic energy from the sun can travel through space?
their waves require no medium (light waves don't require a medium/sound waves do)
Do all forms of electromagnetic radiation travel at the same speed?
yes (speed of light)
If the density of iron is 7870 kg/m3 and the density of lead is 11350 kg/m3 and aluminum has a density of 2700 kg/m3 - which would a sound wave travel through the slowest?
aluminum (remember, density will affect the speed at which a sound wave travels through it, lower the density the faster the sound wave can travel)
According to the Electromagnetic Spectrum, name a type of radiation that has a wavelength lower than visible light and name one that has a wavelength higher than visible light.
lower = radio/microwave/infrared
higher = UV, x-ray, gamma ray
How is it you are able to see your image in glass sometimes?
some of the light is being reflected off the surface of the glass mirroring your image
When light is interacting with different surfaces; shiny metal, clear plastic, and painted black, how would each surface react to the light?
shiny metal would reflect the light, clear plastic would allow the light to pass through, and the black surface would absorb the light energy
Between white poster board, an overhead light, clear window glass, or black construction paper, which would reflect almost all of the light that strikes it?
white poster board
When light traveling through the air slows down as it moves through water in a glass how will it impact the way you see a spoon/straw/stick/pencil/etc. in that glass?
The object will appear bent (refract)
If you shine a light onto paper and the light contains both blue and red wavelengths of light and the paper were blue, what color or colors of light would bounce off the paper?
Only the blue would bounce (reflect) off of the paper
If you are doing an experiment to see what colored material absorbs the most light energy by using a lamp on white, black, and red paper and placing a thermometer on the paper to record the temp after three hours, what would the dependent variable be?
The temperature of the paper (independent variable is what is being tested and dependent variable is the outcome)
Why is it we can see some of the light energy from the sun, but not all of it?
Describe the relationship between an element and a compound including how they are bonded?
an element contains one type of atom and appears on the periodic table while a compound is two or more elements chemically bonded together.
Is a biologist who is testing to see how plants react to certain chemicals performing an experimental investigation, descriptive investigation, or comparative investigation?
experimental investigation (remember experimental uses a control and manipulates variables - cause and effect, comparative compares data from groups or situations - relationships or differences, descriptive focuses on detailed observations like recording weather patterns or drawing anatomy - describe or quantify systems/organisms)
Why would information in an older medical journal have different information than newer books?
science knowledge changes as new evidence is provided
What property of the outer planets (gas giants) would account for their having more moons than the number of moons that orbit Earth?
Gas giants are more massive than Earth and thus have greater gravitational forces, so they could attract more objects.
If you hold a solid piece of gallium (metal element) in your hand, your body warmth would melt the gallium. What is this an example of?
physical change
What is the main difference between a law and a theory?
A law is a description of an event (the what) and a theory is an explanation of something (the why)