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WorksheetsDCFA #1 Review
Total questions: 90
Worksheet time: 6hrs 21mins
Which of the following are true of Cell Theory (select all that apply)
All living things are made of cells
Cells are the building blocks of life
All cells are created from existing cells
Cells randomly generate from nothing
True of false: all living things are made of cells
true
false
What do the organisms in the picture have in common (a)
what can be found in plant cells but not animal cells (select all that apply)
cell wall
chloroplast
cytoplasm
large vacuoole
what is the function of the cell membrane?
Regulate the movement of substances in and out of the cell
what is the function of the vacuole?
the chloroplast produces (a) from water and sunlight in plant cells
the mitochondria convert (a) into (b)
which organelle has a similar function to the skin?
what are the three parts of cell theory?
the cell is the basic unit of life
all things living and nonliving are made of cells
cells are produces from other cells
all living things are made of cells
True or false: all cells come from pre-existing cells by reproduction
characteristics passed down from your parents to you are called (a) traits
what is located in the nucleus that determines your traits
true or false: a wind turbine is not affected by changes in weather
what types of renewable energy are dependent on the sun?
hydroelectric
solar
wind
biomass
nuclear
where does the roller coaster have the most potential energy?
a biker at the edge of a mountain shows what type of energy?
a rock is about to fall over a waterfall. what kind of energy is shown?
(a) is the heat transfer responsible for frying bacon in a pan
(a) is the heat transfer responsible for blowing warm air around the earth
(a) is the heat transfer responsible for warming you up when you sit by a fire
heat energy always moves from (a) to (b)
label the image
conduction
convection
radiation
using a hot plate to boil water converts (a) energy to (b)
label the cell
nucleus
cytoplasm
mitochondria
label the cell
mitochondria
nucleus
vacuole
cell wall
chloroplast
what is the biggest advantage of geothermal energy?
depends on the sun
does not depend on the weather
it is expensive
it does depend on the weather
which best describes natural gas
which has the most potential energy?
which point shows the object with the most kinetic energy?
what energy transformation happens when you turn on a flaslight?
what do you find in a plant cell but not in an animal cell?
locate the structure that moves substances in and out of the cell
Every living organism is made up of one or more cells
True
False
A Tree
alive
not alive
A River
alive
not alive
Animals cells and plant cells are exactly the same.
True
False
Only ____________ cells have a cell wall as well as a cell membrane.
plant
animal
white blood
living
A chicken egg is a cell.
True
False
All plant and animal cells contain chromosomes with DNA.
True
False
A seed
alive
not alive
Coach James
alive
not alive
DEFINITELY not alive
not sure
possibly a vampire
The fastest growing organ in humans is the _____________.
bones
lungs
skin
nucleus
Genes are made of the molecule ______________________.
hydrogen
DNA
oxygen
chromosome
_____________ a very long molecule that has chemicals in a special order.
A nucleus is
Genes are
DNA is
Skin is
A person has ____________ pairs of chromosomes.
46
23
26
48
Which point has the most potential energy?
G
F
B
A
At which point of the roller coaster is potential energy the greatest?
W
X
Y
Z
The faster an object moves, the ________ kinetic energy it has.
more
less
__________ is stored energy.
Potential
Kinetic
A basketball is being held in the hands of a player. This shows...
Potential energy
Kinetic energy
Kinetic energy depends on the ________ and ________ of the object.
Height (position)
Mass
Speed
Friction
If these are all moving at the same speed, the vehicle with the greatest KE would be
(Think about their sizes)
This is an example of what type of energy?
Kinetic
Potential
Electric
Thermal
Thermal Energy
The total kinetic and potential energy of all the particles in an object.
Energy that is transferred from a warmer object to a cooler object.
A measure of the average kinetic energy of the particles in a substance.
The heating of a substance that causes its particles to move more quickly.
A lamp that plugs into a wall socket draws energy, which flows through a thin wire in the bulb, causing it to heat up until it glows. What energy transformations are taking place?
Chemical → light → electrical
Mechanical → sound → light
Thermal → solar → electrical
Electrical → thermal → light
An electric pencil sharpener uses electricity to make its motor spin. The pencil sharpener also makes noise and heats up. Which observation of the pencil sharpener demonstrates the law of conservation of energy?
The amount of electrical energy used equals the total amount of mechanical, sound, and thermal energy produced.
The amount of energy used by the electric pencil sharpener is greater than an electric lamp.
The electric pencil sharpener only uses energy when it is being used to sharpen a pencil.
The electric pencil sharpener is easier to use than the older version that was cranked by hand.
Turning the handle makes a current that causes the light bulb to glow. What are the energy transformations that happen in this hand generator?
Thermal → solar → light
Mechanical → electrical → light
Electrical → mechanical → light
Solar → light → electrical
When energy enters a system and then comes out of the system later, the law of conservation of energy states that–
some of the energy that entered the system will remain in the system.
the energy will always create a change in the properties of the parts of the system.
the form of energy that comes out of the system must be the same form that entered.
the amount of energy coming out of the system must equal the energy that entered the system.
In which of the following scenarios would this energy transformation be observed?
chemical → light → heat
Plucking a guitar string
Lighting a match
Turning on a fan
Starting a car
Which of the following is a form of potential energy?
sound energy
chemical energy
mechanical energy
thermal (heat) energy
The law of conservation of energy states ___.
electrical energy can be transformed into other forms
energy can be created and destroyed
energy is never created nor destroyed
what goes up must come down
There are ___ forms of kinetic energy.
3
5
4
2
There are ___ forms of potential energy.
3
5
4
2
During energy transformations, energy is never ___.
released as heat
used to increase an object's potential energy
created or destroyed
completely transformed
A baseball is hit into the air with a bat. When does baseball have the greatest gravitational potential energy?
when it hits the ground
when it reaches its highest point
when it leaves the bat
when the mechanical and kinetic energies of the baseball are equal
___ is energy stored by things that stretch or compress.
Gravitational potential
Elastic kinetic energy
Chemical kinetic energy
Elastic potential energy
Calculate the gravitational potential energy of the object.
GPE = mgh
mass: 50
gravity: 10
height: 6
5320J
300J
66J
3000J
Calculate the kinetic energy.
KE=21mv2
mass: 200
velocity: 5
2,500J
250J
500,000J
none of the above
What type of energy is stored in a battery?
electrical
thermal
radiant
chemical
Which energy transformation occurs in a toaster?
electrical → thermal
chemical → thermal
nuclear → electrical
thermal → electrical
A battery converts what type of energy to another?
electrical → thermal
chemical → electrical
kinetic → nuclear
light → heat
Energy transformations occur when ___.
a chemical reaction takes place
energy changes from one form to another
energy is created through conduction
two forces slide together that are touching
Which items would have this energy transformation: chemical → mechanical
a candle burning
eating a big breakfast before a race
a ball bouncing
using a hairdryer
Which of the following is not a source of stored chemical energy that can be turned into a form of kinetic energy?
a battery in a toy car
food
the nucleus of an atom
fossil fuels
