Science review 1
Which type of energy is stored up, and increases when the distance above ground increases?
Potential
What is the charge of an electron?
Negative
What is the charge of a proton?
Positive
Is this an example of a molecule or an atom?
Gold
atom
grass....bird .....snake.....hawk
x5
which is the primary consumer
bird
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
Which of these is a molecule?
NaCl (salt)
Aluminum
Oxygen
NaCl (salt)
What occurs at the boiling point of a substance?
a. the substance changes from a gas to a solid
b. the substance changes from a liquid to a solid
c. the substance changes from a solid to a liquid
d. the substaqnce changes from a liquid to a gas
When light shines through a prism it bends. This is also know as
a. reflection
b. refraction
c. absorption
d. shadow
Inversely Proportional
What does the Law of Conservation of Mass say?
Matter is never created or destroyed, but transformed into a different form.
What is the formula for finding density?
mass divided by volume
What is the process by which plants make energy from the sun?
photosynthesis
What are the PRODUCTS of photosynthesis?
oxygen and glucose (sugar)
What is the name of this molecule?
CO2
Carbon Dioxide
What is the process by which dry ice transforms from a solid to a gas without going through the liquid phase?
sublimation
What is the name of this common molecule?
C6H12O6
Glucose
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
Where do all living things on the earth originally get their energy from?
The sun
What is it called when the earth heats up too much and the glaciers start to melt?
Global Warming or Global Climate Change
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!
x2
Frank has a beaker with a mixture of salt and water. He would like to recover the salt from the water. Which would be the best method to accomplish this?
a. evaporation b. reflection
c. freezing d. refraction
a. evaporation
Mass divided by volume is the formula for what?
Density
The Earth is mostly covered by oceans. Oceans are found in the
a. hydrosphere
b lithosphere
c. atmosphere
d. troposphere
a. hydrosphere
Which direction does energy flow in a trophic food/energy pyramid?
From the Bottom to the Top
Odor, Color, Precipitate, Gas, Temperature change (sometimes light and sound) are all examples that what has occurred?
a chemical change
The change in frequencies of alleles in a popualtion over time is referred to as _________
evolution
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?
JOULE
x3
Which of the following is a physical change?
a. lighting a match b. rusting metal
c. baking a cake d. making koolaid
d. making koolaid
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
What is the unit for the frequency of a wave?
Hertz (Hz)
What is the energy of motion called?
Which of these is NOT a greenhouse gas?
water vapor
carbon dioxide
methane
oxygen
oxygen
What is the SI (metric system) unit for volume?
liter
What is the process by which your body gets energy in every cell?
Cellular Respiration
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
The study of the structure of organisms and their parts is referred to as __________
Anatomy
C6H22O6
34
How many atoms of hydrogen are in 3 molecules of H2O?
6
Only 10% of the energy is used when going up each level of a trophic pyramid.
Where does 90% of the energy go when going up the trophic pyramid?
90% is lost as heat to the enviornment
x4
A student wanted to look at pond water to see what organisms they could find. Which of the following tools would the student use?
a. balance b. graduate cylinder
c. microscope d. magnifying glass
c. microscope
What type of potential energy is food or fuel?
chemical potential
x8
grass.... mice....snake...hawk...
What would happen if the mice were removed from the food
a) The grass would increase and the hawk would decrease
b. The snakes would increase and the hawks would decrease
c. The grass would increase and the snakes would decrease
d. The Hawks would increase and the grass would decrease
c) grass would increase and the snakes decrease
Which of the following are physical properties?
density
melting point
flammability
explosive
reactivity
density and melting point
Through which phase of matter does sound travel fastest?
solid
If a light hits a mirror at 45 degrees it will bounce off at 45 degrees due to the the Law of ___________.
Reflection
Which of the following is the LARGEST atom?
Hydrogen
Oxygen
Lithium
What can you do to get a mylar balloon to float again once it has deflated?
Heat it up to increase the volume and decrease the density
What is the formula for carbon dioxide?
CO2
You cannot hear sound in space because there is no what?
Medium
waxing crescent, first quarter, waxing gibbous, waning gibbous, third quarter and waning crescent are all phases of what cycle?
The Moon Cycle
How many hydrogen atoms are in 4 molecules of NH4?
16
x4
Which is the best example of a chemical change?
a. fireworks exploding
b. cutting paper
c. crushing a can
d. melting snow
a. fireworks exploding
Which color of light is the WORST for shining on plants so they can do photosynthesis?
GREEN! Because plants reflect green light, that's why we see them as green. If they reflect green, they are not using that light as energy.
How is an owl pellet made?
A regurgitated ball of undigested fur, bones, and other pieces of animals that an owl eats.
C6H12O6 is the chemical formula for what?
Glucose
What are the reactants of photosynthesis?
Carbon dioxide, water, and sunlight
grass.....bird.....snake.....hawk
Which is the secondary consumer
snake
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
Look at a periodic table to find this answer...
How many protons are in an atom of carbon?
x3 points
6
What is the charge of a neutron?
neutral=no charge
x2
Which material is a pure element or atom?
a. alcohol
b. copper
c. salt
d. water
b. copper