physical science study guide 1
________ modified the __________ system.
Kepler, Copernican
_______ discovered that the ________ are ellipses.
Kepler, Planetary orbits
What is the order for Venus, mercury, earth and mars with regard to distance from the sun? (starting with the closest to the sun)
Mercury, Venus, Earth, Mars
________ was the scientist who showed that gravity accounts for Keppler's laws of planetary motion.
Newton
________ is the object in the sky that lies very nearby on an extension of the earth's axis.
Polaris
The _____ system has the earth as the center of the universe.
Ptolemaic
A law is the result of regularity in observed data or a relationship between different quantities. True or false
True
It is believed that living things have evolved throughout the earth's history. True or false
True
The British unit of length closest to the meter is the _____
Yard
The time needed for a planet to orbit the sun depends on the _________ _______ of a planet from the sun.
average distance
The stars in a ________ form a pattern in the sky as seen from the earth.
constellation
A ____ is the time needed for the earth to turn completely on its axis.
day
The time at which a given star rises above the horizon each night is _____ than the night before.
earlier
Relative to the stars, the moon seems to move _________
eastward
Stars and planets are round because ____________forces them into this shape.
gravity
In most parts of the world ____ _______occur approximately _____a day.
high tides, twice
When the sun, earth, and moon are all in line, the_______ tides are higher than usual and ______tides are lower than usual.
high, low
The first proposed scientific idea is called a ________
hypothesis
The prefix ____stands for 1,000,000
mega
Can Neptune be seen with the unaided eye?
no
Is gravity responsible for holding atoms and molecules together?
no
The period of the earth's orbit around the sun is __________.
one year
The ______ relies on experiment and observation.
scientific method
If the earth had no moon, the average tidal range would be _________
smaller
The _______ of a planet is at its_______ when it is_______ to the sun.
speed, highest, closest
Scientific ______ must be constantly reviewed to see whether they are in accord with new experimental observations.
theories
Astrology is nonsense. True or false
true
If the earth were to revolve on its axis slower than it does today, its shape would be closer to a perfect shape. True or false
true
In the distant part, the length of the day was shorter than 24 hours. True or false
true
The length of a year is more than 365 days. True or false
true
The moon is chiefly responsible for the tides, with the sun's influence modifying the tidal range. True or false
true
A ____ is the time needed for the earth to turn completely on its axis seven times.
week
A ______ is the time needed for the sun to drift completely around the sky.
year