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
What is the charge of a neutron?
neutral=no charge
What is the process by which dry ice transforms from a solid to a gas without going through the liquid phase?
sublimation
When light shines through a prism it bends. This is also known as
a. reflection
b. refraction
c. absorption
d. shadow
b. refraction
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
What does the Law of Conservation of Mass say?
Matter is never created or destroyed, but transformed into a different form.
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 the process by which plants make energy from the sun?
photosynthesis
What are the PRODUCTS of photosynthesis?
oxygen and glucose (sugar)
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
What are the reactants of respiration?
Glucose and Oxygen
Which of these is a mixture?
A. carbon dioxide
B. water
C. salt water
D. sugar
C. salt water
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
Where do all living things on the earth originally get their energy from?
The sun
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 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
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
The Earth is mostly covered by oceans. Oceans are found in the
a. hydrosphere
b lithosphere
c. atmosphere
d. troposphere
a. hydrosphere
What is the energy of motion called?
Kinetic energy
What are the some evidences of a chemical change?
Odor
Color
Precipitate
Gas
Temperature change (sometimes light and sound)
A vehicle traveled 30 meters in 6 seconds. Calculate its speed.
5 m/s
What is the mass number of a nitrogen atom with 8 neutrons?
15
atomic number + number of neutrons= mass number
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
grass.....bird.....snake.....hawk
Which is the secondary consumer
snake
What is the total number of atoms in this molecule?
C6H22O6
34
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
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
What are the reactants of photosynthesis?
(HINT: THERE'S 3)
Carbon dioxide, water, and sunlight
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
What is the process by which your body gets energy in every cell?
Cellular Respiration
How many hydrogen atoms are in 4 molecules of NH4?
16
Through which phase of matter does sound travel fastest?
solid
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.