Science review 1
Which 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
Give an example of a physical change
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
grass....bird .....snake.....hawk
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
Where is the dependent variable plotted on a graph?
y-axis
An insect wing and a bird wing are examples of what?
A. vestigial structures
B. analogous structures
C. embryology
D. homologous structures
d . homologous structures
When light shines through a prism it bends. This is also known as
a. reflection
b. refraction
c. absorption
d. shadow
b. refraction
How would you describe the relationship between volume and density?
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)
This type of cell does not have a nucleus
a. eukaryote
b. plant cell
c. animal cell
d. prokaryote
d. prokaryote
What is the process by which dry ice transforms from a solid to a gas without going through the liquid phase?
sublimation
Which of these is a mixture?
A. carbon dioxide
B. water
C. salt water
D. sugar
C. salt water
What type of graph would you use to plot continuous data (ex. time vs temperature)
a. bar graph
b. line graph
c. pie chart
d. none of the above
b. line graph
Where do all living things on the earth originally get their energy from?
The sun
As the atomic number of an atom increases, generally what happens to the atomic mass?
a. it increases
b. it decreases
c. it stays the same
a. it increases
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!
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
What are the reactants of respiration?
Glucose and Oxygen
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?
A) producer- sun- consumer- decomposer
B) decomposer- consumer- producer- sun
C) sun- producer- consumer- decomposer
D) sun- consumer- producer- decomposer
C) sun- producer- consumer- decomposer
What are the some evidences of a chemical change?
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?
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
What is the mass number of a nitrogen atom with 8 neutrons?
15
atomic number + number of neutrons= mass number
Which object must you apply more force to in order to move it?
object 2
F=m x a
What is the role of ribosomes in the cell?
They make proteins
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 an example of a homozygous dominant genotype
a. TT
b. Tt
c. tt
d. none of the above
a. TT
What is the energy of motion called?
Kinetic energy
As cattle walk around eating grass they stir up lots of insects. The egrets hang around and get a yummy meal of insects. What type of symbiosis is this?
A. mutualism
B. commensalism
C. parasitism
D. nothingism
B. commensalism
What is the SI (metric system) unit for volume?
liter or cubic centimeter
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?
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
Black fur is dominant over white fur. If two heterozygous individuals breed, what is the probability that they will have white offspring?
a. 100%
b. 75%
c. 25%
d. 0%
c. 25%
What is the total number of atoms in this molecule?
C6H22O6
34
List some differences between DNA & RNA
DNA: double stranded, deoxyribose, A T C G
RNA: single stranded, ribose, A U C G
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
A vehicle traveled 30 meters in 6 seconds. Calculate its speed.
5 m/s
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
In which situation is a chemical reaction not taking place
a. salt dissolving in water
b. rusting of an old car in a junk yard
c. burning gasoline in a car
d. digestion of food in our body
a. salt dissolving in water
Which of the following is the LARGEST atom?
Hydrogen
Oxygen
Lithium
Oxygen
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 tool should you use to determine the mass of an object?
balance
You moved a goldfish bowl , a book and a flower vase from the floor to the 3rd shelf. What type of energy does each object have?
a. elastic potential
b. gravitational potential
c. chemical potential
d. kinetic potential
b. gravitational potential
grass......mouse .......fox...... snake
Which organism gets the most energy?
a. snake
b. mouse
c. grass
d. fox
c. grass
How many hydrogen atoms are in 4 molecules of NH4?
16
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.
Bob wants to determine at what ramp height will a cart roll the fastest. What would be his independent variable?
a. speed of the cart
b. ramp length
c. ramp height
d. none of the above
c. ramp height
Erminette feathers in chicken is caused by a cross between a black feathered chicken and a white feathered chicken. What percentage of white feathered offspring would we expect if we crossed a black feathered chicken with an erminette chicken?
0%
What are the reactants of photosynthesis?
(HINT: THERE'S 3)
Carbon dioxide, water, and sunlight
x 2
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?
6
What is the charge of a neutron?
neutral=no charge
Which material is a pure element?
a. alcohol
b. copper
c. salt
d. water
b. copper