The diaphragm is a system of muscles that allows ....? - ANSWER
Breathing
A convex mirror ... light waves,
A convex lens ... light waves. - ANSWER Diverges
Converges
The state of matter occurring at lower temperatures is the ... state -
ANSWER Solid
What is the difference bw physical change and chemical change? -
ANSWER A physical change may alter the form, size or shape of
matter; a chemical change alters its molecules.
,Put these in order to describe how blood flows from the heart to the
body: body, left atrium, right atrium, right ventricle, left ventricles, lungs
- ANSWER Right atrium, right ventricle, lungs, left atrium, left
ventricle, body
An acid gives up _____ charged hydrogen ions when dissolved in water.
- ANSWER positively
When genetic signals in a cell fail to tell it to stop reproducing, the
result may be - ANSWER cancer
A type of matter is classified as an element when _____ - ANSWER
It cannot be separated into different types of matter by ordinary
chemical methods
,The speed of light in a vacuum is approximately _____ meters per
second - ANSWER 300 million
What is inertia? - ANSWER The tendency of an object to
resist a change in motion
What is a vector quantity? - ANSWER a quantity defined by
both magnitude and direction
What formula is used to calculate velocity - ANSWER v = d/t,
where v = velocity (a vector quantity), d = displacement (a vector
quantity), and t = time
, Which two bodily functions are enhanced by calcium? - ANSWER
bone growth, muscle function
The Moon affects which activity on Earth? - ANSWER tides
The asteroid belt closest to the Earth lies between which two planets? -
ANSWER Mars and Jupiter
Define biosphere - ANSWER The biosphere consists of the
layers of Earth (crust, surface, atmosphere) where life naturally occurs.
Why are the four planets closest to the sun called the terrestrial planets
- ANSWER The composition of these planets is similar to that
of Earth.
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