Science 8 Final 2
Card Set Information
Science 8 Final 2
the rate at which velocity changes
What happens when 2 forces act in the same direction?
Which group contains the most elements
Atomic number is the number of
The elements in a row of the periodic table
The classes of organic compounds found in all living things are
carbohydrates, lipids, proteins and nucleic acids
Ionic bond is attraction between
2 oppositely charged ion. Forms as a result of the attraction between positive and negative ions
The elements in a column of the periodic table
have similar characteristics
Carbon is able to bond with atoms of other elements in many different ways because
it has 4 valance electrons
2 most common alkali earth metals
magnesium and calcium
Number of protons equals number of _________
Most metals are NOT
liquid at room temperature!
In the periodic table the most reactive metals are
at the far left, they decrease as they go across and down
which group of elements shares characteristics of metals and nonmetals
fluorine chlorine bromine iodine belong to which family
Which elements do not normally form compounds with other elements?
in water bases form
Hydroxide ions (OH -)
what does a neutralization reaction produce
a salt and water HCl + NaOH --> H2O +NaCl
the measure of how much matter an object contains is it
Work is measured in
in a lab, volumes of liquid are usually measured with a
Which particles in an atom are in the nucleus
proton and neutrons
The sun is made up mostly of
What is the change from liquid to solid,or the reverse of melting called?
In which state of matter that the particles spread apart and fill the space available to them?
in a series circuit with three bulbs what happens when you add another bulb?
They all become dimmer
numbers in front of a chemical formula tell you
how many of that molecule are in the formula
the achievement of lifting a rocket off the ground can be explained by
Newtons third law
a disturbance that transfers energy from place to place is called
What form of carbon is so hard it could be used for cutting tools?
periodic table - what indicates number of protons
highest part transverse wave is called
Speed equals distance divided by what?
the speed of a wave is its wavelength divided by
which part of atom moves around nucleus
the maximum distance the particles of a medium move away from their rest positions
Anything that has mass and takes up space is called
when an atom loses an electron it becomes
ramp is an example of
law of universal gravitation states that any two objects in the universe without exception
there is the force of attraction between them which is called
gravitation force that is always directly propotion to the masses and
indirectly proportion to the squre of the distance between them.
The force of gravity on a person or object at the surface of a planet is known as
Current can flow through each of
the bulbs without first having to flow through any others.
If any of the bulbs fail the others will still
work as current can still flow through the rest of the circuit.