Science review 1
This type of energy is stored up, and increases when the distance above ground increases.
Potential
Give an example of a chemical change (reaction)
Random Answers that may include: Burning stuff, changing the molecules permanently
Random answers that may include: bending, cutting, or melting something, but not changing the molcules in a permanent way.
Is this an example of a molecule or an atom?
Gold
atom
A substance can change from a liquid to a gas. This is known as
boiling point (or evaporation)
A person jumps out of an airplane and does not deploy his/her parachute. Which type of energy is increasing as he/she falls towards the ground?
kinetic is increasing and potential is decreasing
x5
You moved a goldfish bowl , a book and a flower vase from the floor to the 3rd shelf. What type of potential energy does each object have?
a. elastic potential
b. gravitational potential
c. chemical potential
d. kinetic potential
b. gravitational potential
This is also known as the energy in motion.
What is kinetic energy?
Name all the major divisions of visible and non-visible light in the electromagnetic spectrum from largest to smallest wavelength.
Radiowave, Microwaves, Infrared, Visible Light, Ultraviolet, X-Rays, Gamma Rays
This is also known as the law of conservation of energy.
Matter is never created or destroyed, but transformed into a differet form.
What is the formula for finding density?
mass divided by volume
The type of wave that can physically compress matter
Longitudinal Wave
What is the name of this molecule?
CO2
Carbon Dioxide
x6
Which is an example of a chemical change?
a. melting ice
b. dissolving salt in water
c. hammering metal into a thin sheet of foil
d. burning a piece of paper
d. burning a piece of paper
This is the number of atoms of hydrogen that are in 3 molecules of H2O.
6
Which would be an example of chemical potential energy: (x3)
a. a spring compressed
b. a ball rolling down a hill
c. a child sitting at the top of a slide
d. powder on the tip of a match
d. powder on the tip of a match
A 1.5 m wave made by dropping a ball in water has a frequency of 4.5 Hz. Find the speed of the wave.
6.75 m/s
What is it called when the earth heats up too much and the glaciers start to melt?
Global Warming or Global Climate Change
x 7
What is evaporation?
a . gas turns to liquid
b. solid turns to liquid
c. liquid turns to gas
d. water turns to ice
c. liquid turns to gas
Which has more energy: a 50 kg rock or a 100 kg rock?
100 kg rock because more mass=more energy!
What is the charge of a neutron?
neutral=no charge
Of these four, THIS is the largest atom.
Hydrogen
Oxygen
Lithium
Carbon
Oxygen
This is the formula for carbon dioxide.
CO2
There are 7 evidences of a chemical change. Name 3.
Odor
Color
Precipitate
Gas
Temperature change (sometimes light and sound)
Tommy placed a black, white, silver, and blue can under a heat lamp with a thermometer in each one. Which one of the cans will be the coolest? (x4)
a. black, because it absorbs the heat
b. blue, because it wasn't under direct light
c. white because it would reflect light
d. silver, because it is shiny
c. white, because it would reflect light
x5
Frozen orange juice is place in a bowl. After a few minutes it begins to melt. What type of change has occurred?
a. chemical
b. melting
c. physical
d. mixture
c. physical
What is the unit for energy?
10x points if you sing the song for this one!
JOULE
Look at a periodic table to find this answer...
How many protons are in an atom of carbon?
6
When light shines through a prism it bends. This is also known as
refraction
Put the following media in order from the fastest to slowest in terms of the speed of sound.
Water, Cold Air, Hot Air, Wood, Vacuum
Wood > Water > Hot Air > Cold Air > Vacuum
How many hydrogen atoms are in 4 molecules of NH4?
16
What is the SI (metric system) unit for volume?
liter or cubic centimeter
Through which phase of matter does sound travel fastest?
solid
Two rock samples are placed in water. Sample A floats, but sample b sinks to the bottom.
Which statement describes the 2 samples of rock (x
a. sample b has more mass
b. sample a has less volume
c. sample b has a greater density
d. sample a has a higher freezing point.
c . sample has a greater density
Tom tosses a spring in the air. What type of energy does the spring have?
a. elastic and chemical
b. chemical and gravitational
c. gravitational and elastic
d. gravitational and physical
c elastic and gravitational