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2nd Semester Review
simple machines, energy, space, chemistry
66
Science
7th Grade
05/29/2010

Additional Science Flashcards

 


 

Cards

Term

26


FE

Iron


56

 

What is the Atomic mass?

Definition
56
Term

40

Zr

Zirconium

91

What is the Atomic number?

Definition
40
Term

78


Pt

Platinum


795

 

How many neutrons are there in Platinum?

Definition
717
Term
A ____ is a rod or plank that pivots about a fixed point
Definition
lever
Term
A clump of grass, a small bush, or a rock can act as the obstacle around which a _____ will start to form
Definition
dune
Term
A firecracker that has not been lit is an example of ____
Definition
potential energy
Term
A foot kicking a football is an example of ____
Definition
kinetic energy
Term
A force is a _____
Definition
push or pull
Term
A force is exerted on a box and an equal and opposite force isexerted by the box.  What explains this?
Definition
Newton's third law
Term
A fossil fuel
Definition
coal
Term
A moving skateboard is an example of _____
Definition
kinetic energy
Term
A person in a head-on car collision who is not wering a seat belt continues to move forward at the original speed of the car because of ___
Definition
inertia
Term
A rock at the edge of a cliff is an example of ___
Definition
potential energy
Term
A rock sitting on top of a cliff has ___.
Definition
potential energy
Term
A running man is an example of _____
Definition
kinetic energy
Term
An advantage of nuclear energy is that ____
Definition
it does not contribute to air pollution
Term
As the temperature of a material increases, the averge ___ of its particles also increases
Definition
kinetic energy
Term
Asteroids, the Sun, planets, comets, and other objects form the ___
Definition
solar system
Term
Depressions on the Moon formed by large meteorites are called ____
Definition
craters
Term
During an equinox, the Sun is directly above Earth's ___
Definition
equator
Term
Earth spins on its axis, and one rotation takes about one _____.
Definition
day
Term
Energy occurs in ____
Definition
many forms
Term
For an ideal machine, the work in is equal to _____
Definition
the work out
Term
Force is measured in which units?
Definition
newtons
Term
Ice wedging is brought about by _____
Definition
water freezing and thawing
Term
In general, metals are ___
Definition
good conductors of heat
Term
It takes the Moon the same amount of time to orbit Earth once as it does to rotate ____ on its axis.
Definition
once
Term
Minerals found in the B horizon were dissolved in water and carried there by a process called ___
Definition
leaching
Term
Most air pollution results from  ____
Definition
the burning of fossil fuels
Term
Most likely, ____ were formed when lava from the Moon's interior flooded bowl-like regions on the Moon's surface
Definition
maria
Term
Newton's first law of motion states that an object stays at rest unless an ____ acts on it
Definition
unbalanced force
Term
Oxidation occurs when materials containing ____ are exposed to oxygen and water
Definition
iron
Term
Plants cannot grow without
Definition
soil
Term
Soil is a mixture of wethered rock, mineral fragments, water, air and ___
Definition
decayed organic matter
Term
The B horizon is ____
Definition
lighter than the A horizon
Term
The aability of an apple to change color when exposed to air is a _____.
Definition
chemical property
Term
The difference between mechanical and chemical weathering is ____
Definition
the way they affect the makeup of a rock
Term
The layer of soil that contains the most organic material is called the _____ horizon
Definition
A
Term
The longest day of the year in the northern hemisphere is the ____
Definition
summer solstice
Term
The rock and mineral fragments in soil come from rock that has been ____
Definition
weathered
Term
The three R's of conservation are ___
Definition
reduce, reuse, recycle
Term
Three examples of physical changes are _____
Definition
melting ice, mowing the lawn, carving a statue
Term
To produce hydroelectric power, _____ is needed.
Definition
flowing water
Term
Vegetable soup is an exaple of a _____
Definition
heterogeneous mixture
Term
Weathering that is the result of leaves decaying in the forest
Definition
chemical weahering
Term
Weathering that is the result of the oxidation of minerals that contain iron
Definition
chemical weathering
Term
Weathering that is the result of tree roots cracking the concrete sidewalk
Definition
mechanical weathering
Term
Weathering that results from acids from plant roots that break up rocks
Definition
chemical weathering
Term
Weathering that results from the repeated freezing and thawing of water that cracks rock
Definition
mechanical weathering
Term
What can cause acid precipitation?
Definition
the use of coal
Term
What group number would you find Noble Gases in?
Definition
1
Term
What is the freezing point of water on the Celsius temperature scale?
Definition
0 celsius
Term
What is the term for speed at any instant in time?
Definition
instantaneous speed
Term
When a chunk of dry ice is at room temperature, a cloud of carbon dioxide vapor forms. The carbon dioxide is changing from a ____
Definition
solid to a gas
Term
When farmers leave plant stalks in the field to reduce soil erosion, it is called ___
Definition
no-till farming
Term
When people plant vegetation, they ____ erosion
Definition
reduce
Term
When the Sun, the Moon, and ___ line up, a lunar eclipse occurs.
Definition
Earth
Term
Where is the chemical energy in a material stored?
Definition
the bonds between atoms
Term

Which describes how velocity changes with time?

 

a. average speed

b.  acceleration

c.  inertia

Definition
acceleration
Term

Which of the following is NOT a possible sign of a physical change?

 

a.  change in color

b.  change in volume

c.  release of energy

Definition
release of energy
Term

Which of these statements about matter is NOT true?

 

a. During chemcial changes, matter is destroyed

b.  Matter is made up of atoms

c.  Matter has mass and takes up space

Definition
During chemical changes, matter is destroyed
Term
Which statement describes the flow of heat?
Definition
Energy moves from a warmer object to a cooler object
Term
____ occurs when glacial ice melts and the water flows down into cracks in rocks, refreezes, and fractures the rock into pieces
Definition
plucking
Term
_____ can be compared to sandblasting
Definition
Abrasion
Term
_____ forms when sediments are blown against an obstacle and settle behind it
Definition
dunes
Term
_____ is done only when an object moves in the diretion of the applied force
Definition
work
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