Misc. review
The educated guess about the outcome of an experiment is called?
A. Conclusion
B. Hypothesis
C. Analysis
B. hypothesis
The definition of matter is anything that takes up space and has _______
a. mass
b. energy
c. a scientific name
a. mass (or weight)
The three common states of matter are?
solid, liquid, gas
True or false: sound can travel through space?
False (sound waves need particles to transfer the vibrations)
Light is made up of tiny packets called __________?
Photons
What special technique do bats use to fly and locate prey in the dark?
echolocation
Matter is made up of tiny particles called ______
atoms (or molecules)
in which of the three states are the particles closest together?
solid
The distance from one point on a wave to the next (crest to crest) is called the ______________
a. wavelength
b. amplitude
c. frequency
a. wavelength
True or false? Light waves need a medium to travel through
False. Light does not need particles to transfer its energy, it can travel through a vacuum.
In an experiment, how many things can you change between the two samples that you are testing?
a. as many as you want
b. only one thing
c. 2 or 3, depending on how much time you have
b. only change one thing at a time
When light travels through a different medium and is "bent" it is called?
A. reflection
B. refraction
B.refraction
what can you do to a substance to make it change from one state to another?
add, or remove, heat or pressure
A wave is a disturbance that transports _________ along the distance of the wave.
a. matter
b. people
c. energy
c. energy
radio waves, x-rays, visible light and gamma rays are all part of the _________________ spectrum
a. physics
b. radiation
c. electromagnetic
c. electromagnetic
Name 5 steps of the Scientific Method, in correct order
Question, Hypothesis, Experiment, Analyze Data, Conclusion
the "screen" at the back of your eyeball that detects the light coming in is called the _____________
retina
in which state does a particle have the most energy?
hint: having more energy means it moves around more
gas (or plasma)
give two examples of a mechanical wave
sound, water waves, seismic waves, etc.
explain how we see things (include what the light is doing and use the proper names for the parts of the eyeball)
light reflects off an object, passes through the cornea (which bends the light), and the pupil, and hits on the retina, which sends signals to our brain' interpreting what we see
Why do leaves change color in the fall?
Controls
explain why the image on the retina is upside down (can draw a diagram)
the light is bent inward and top becomes bottom and bottom becomes top
Describe the earth's water cycle. Include the words gas, liquid and solid
liquid water evaporates from lakes and oceans into the air (where it is a gas). When it gets cold in atmosphere, it condenses into liquid (rain) or solid (snow/ice) and falls back to earth.
sounds waves that look squished together are higher in pitch or lower than waves that are spread apart?
higher pitch
explain how a rainbow works
the raindrops in the sky act like tiny prims, splitting the white light from the sun into the different wavelengths that we see as different colors