Science review 1
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science review 8
100
Which type of energy is stored up, and increases when the distance above ground (height) increases?
Potential
100
Give an example of a chemical change (chemical reaction)
Random Answers that may include: Burning stuff, changing the molecules permanently
100
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.
100
Is this an example of a compound or an element?
Gold
element
100
grass--->bird--->snake--->hawk
which is the primary consumer?
bird
100
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
100
Which of these is/are a molecule?
NaCl (salt)
H2O (water)
Aluminum
Oxygen
NaCl (salt) and H2O (water)
100
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
d . a substance changes from a liquid from a gas
200
How many days pass between moon pahses?
3.5 days
200
What is the formula for density?
d = m/V
200
What does the Law of Conservation of Mass say?
Matter is never created or destroyed, but transformed into a different form.
200
What is the formula for finding density?
mass divided by volume
200
What is the process by which plants make energy from the sun?
photosynthesis
200
What are the PRODUCTS of photosynthesis?
oxygen and glucose (sugar)
200
What elements is this molecule made up of?
CO2
Carbon and Oxygen
200
What color staars are the hottest
blue
300
How many elements are in this molecule?
C6H12O6
3
300
Which would be an example of chemical energy:
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
300
Where do all living things on the earth originally get their energy from?
The sun
300
What is it called when the earth heats up too much and the glaciers start to melt?
Global Warming or Global Climate Change
300
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
300
Which has more mass?
A) A ball pushed with a force of 200N accelerating at 2m/s2
OR
B) A ball pushed with a force of 100N accelerating at 5m/s2
B
300
What do all the elements in a period have in common?
# of energy levels/rings
300
Which of Newtons Laws is represented here?
A ball hits the baseball bat and it gets flown out of the field
3rd law
400
What type of organism is the most abundant (more of it) in any ecosystem?
producers
400
Which direction does energy flow in a trophic food/energy pyramid?
From the Bottom to the Top
400
What are the 7 evidences of a chemical change?
Odor
Color
Precipitate
Gas
Temperature change
Light
New Substance
400
Which star color will be the coolest?
a. black, because it absorbs the heat
b. blue
c. white
d. yellow
yellow
400
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. sublimation
c. physical
d. mixture
c. physical
400
What is the unit for energy?
JOULE
400
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
400
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
500
What type of tide would we see when there's a New Moon?
Spring Tides
500
What is the energy of motion called?
Kinetic energy
500
Which of these is NOT a compound?
H2O
CO2
Ca3
LiN
Ca3
500
What is the average speed of a car that went from Houston to Dallas (240mi) and took 3 hours to get there?
80mph
500
What moon phase will we see from Earth after this one?
1st quarter
500
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
500
Which list correctly identifies the elements that make up a water molecule?
a. oxygen, hydrogen, nitrogen
b. oxygen, hydrogen, carbon
c. oxygen, hydrogen, oxygen
d. hydrogen, oxygen, hydrogen
d. hydrogen, oxygen, hydrogen
500
What is the total number of atoms in this molecule?
C6H22O6
34
600
How many atoms of hydrogen are in 3 molecules of H2O (3H2O)?
6
600
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
600
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
600
What type of energy is food or fuel?
chemical
600
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
600
Which of the following are physical properties?
density
melting point
flammability
explosive
reactivity
density and melting point
600
What elements are stars mainly made up of?
Hydrogen and Helium
600
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
700
Which of the following is the LARGEST/HEAVIEST atom?
A) Hydrogen
B) Oxygen
C) Lithium
B) Oxygen
700
What type of galaxy is this?
Elliptical
700
What is the formula for water?
H2O
700
If I exhert a force of 100N to the left on a box and my friend exherts a force of 200N to the left. What is the net force on the box?
300N to the left
700
grass......? .......fox
Which organism is missing from this food chain?
a. snake
b. mouse
c. hawk
d. flower
b. mouse
700
How many hydrogen atoms are in 4 molecules of NH4?
16
700
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
700
What is the name of the cloud of dust and gas where stars are born?
Nebula
800
What is the main function of the excretory system?
a) oxygenation
b) moving
c) getting rid of waste
d) protection against disease
c) getting rid of waste
800
What are the organelles that plant cells have that animal cells do not?
chloroplasts and cell wall
800
What are the reactants of photosynthesis?
Carbon dioxide, water, and sunlight
800
grass --->bird--->snake--->hawk
Which is the secondary consumer?
snake
800
What is the reason that Hurricanes spin in one direction in the Northern Hemisphere and a different one in the Southern Hemisphere?
The Coriolis effect
800
Look at a periodic table to find this answer...
How many protons are in an atom of carbon?
6
800
What is the charge of a neutron?
neutral=no charge
800
Which material is a pure element?
a. alcohol
b. copper
c. salt
d. water
b. copper