Science review 1
Science review 2
science review 3
science review 4
science review 5
science review 6
science review 7
science review 8
100
Which type of energy is stored up, and increases when the distance above ground (height) increases?
Potential
100
What is the part of the wave labeled 3?
wavelength
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 phases?
3.5 days
200
Which of Newton's laws best explains why motorists should buckle-up?
Newton's 1st law (an object at rest will stay at rest and an object in motion will stay in motion)
200
What does the Law of Conservation of Mass say?
Matter is never created or destroyed, but transformed into a different form.
200
In Which position would the Southern Hemisphere experience winter?
Point A
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 stars are the hottest
blue
300
How many elements are in this molecule?
C6H12O6
3
300
Which fossil is the oldest?
Crinoid or Coral
300
Where do all living things on the earth originally get their energy from?
The sun
300
According to the data table, which TWO methods require an external source of energy?
Boiling and Ultraviolet light
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 wave has the least amount of energy?
Radio waves
300
What do all the elements in a period have in common?
# of energy levels/rings
300
Which of Newton's Laws is represented here?
A ball hits the baseball bat and it flies out of the field
3rd law (for every action there is an equal and opposite reaction)
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
According to the data table, which type of plastic can help conserve natural resources?
Plastic B
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
A student conducts 5 trials to investigate factors affecting the formation of impact craters and here are the results. What is true about the results of the experiment?
As the speed of the object increased the depth of the crater increased.
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 b has a greater density
500
A chemist draws two molecular models. One model is drawn for formaldehyde (CH₂O) and one model is drawn for formic acid (CH₂O₂). The chemist forgets to write the chemical name above each model. Which model represents Formic Acid?
Model 2
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
Leah is learning to use properties of substances to identify a chemical reaction. She conducts two trials. In the first trial, she pours silicon dioxide (SiO2) into water (H2O). For the second trial, she pours silver nitrate (AgNO3) solution into a test tube with a solution of potassium chloride (KCl). Look at the diagram. In which trial did a chemical reaction occur?
trial 2
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
A student wants to show a friend that a magnetic field exists in the region around a permanent magnet. Which demonstration shows that a field exists?
A. The north pole of a magnet sticks to the south pole of the second magnet when they touch
B. A small magnet held under a piece of paper with iron filings on top makes the filings move into a pattern that covers the whole piece of paper
B
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
What is true about the relative potential energy at various points in the roller coaster diagram?
A. At "1", the potential energy is greater than the potential energy at "3"
B. At "3", the potential energy is greater than the potential energy at "4"
C. At "4", the potential energy is greater than the potential energy at "2"
A. 1 is 5m and 3 is 2m
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 causes the seasons?
The tilt of the Earth
800
Why are these embryos similar in appearance, yet the adults look different?
They had a common ancestor and share some of the same DNA
800
What are the reactants of photosynthesis?
Carbon dioxide, water, and sunlight
800
Students are designing a solar oven that can be made from materials found in their homes. Solar ovens take more time to heat food than regular ovens. The students would like to build a solar oven that heats food as quickly as possible. What TWO things should they consider?
A. type of food that will be heated
B. how often the oven will be used to heat food
C. possible ways of preventing or reducing heat loss from the oven
D. designing an oven that will collect as much sunlight and absorb as much heat as possible
C and D
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