Card Set Information
science test exam space earth beyond chemistry life living biology physics electronics
For my end of year science exam. Year 9
Who discovered that the universe was expanding in 1929?
Edwin Hubble, astronomer.
What is redshift?
The spectra, or the intensity of light of faint objects.
When about did the big bang occur?
About 14 billion years ago.
How large was the universe 14 billion years ago?
Thousands of times smaller than a pin head.
What began with the big bang?
Time, space and matter.
Is the universe still expanding today?
Over the first three minutes of the big bang the universe cooled by how many degrees?
Below 1 billion degrees celsius.
What were the first two elements created?
Hydrogen and helium.
Does the big bang theory say what caused it?
Why does gravity differ on different planets.
Planets vary in size and mass.
What percentage of gravity does mercury compared to earth?
Which planet has a radius of 4,879km?
Which planet has slightly over 90% of earths gravity.
What percentage of earths gravity does mars have?
What are the atoms in the molecule?
Oxygen, Hydorgen, Hydrogen
Why is water is called H
It has 2 hydrogen and 1 oxygen atom
Water forming on the outside of a glass of ice water, your mirror fogging over after you get out of a hot shower, and dew on the grass in the morning, are all examples of what?
Water covers about what percent of the earth?
About what percent earths water is in the oceans?
Why can't we drink the water in the ocean?
It is to salty
What is salinaty?
measure of salt in the water
What kind of water do humans need?
Most of earths fresh water is frozen where?
What percent of earths water can humans drink?
Where do we get drinking water? (there are 4)
The root word of _____________________ is "condense" which means to make smaller.
The root word of _______________________ is "precipitate", which means to move or fall.
What is the source of energy that makes the water cycle happen?
List 5 ways you use water in your everyday life
watering the plants
(or any other use)
Is the Ocean fresh or salt water?
Is the Ocean solid or liquid?
Changes in apparent shape of the moon
Objects that move between Mars and Jupiter
Imaginary line that Earth rotates around
Small mass of ice and dust that orbits the sun
Path an object takes when revolving around another object
An object that moves around another
Large object that moves around a star
Burning sphere of gases
Vast majority of asteriods are found between Mars and Jupiter in the
Diffuse region around the nucleus of the comet, a region of relatively dense gas
Interior to the coma is the __, a mass of mostly water ice with rocky particles
Constant outflow of charged particles from the outer atmosphere of the Sun, which moves past Earth with a velocity of 400 km/s
Largest non-plantary or non-lunar objects in our solar system, larger then 100m in diameter
What are the four basic categories of minor objects
Meteoroids, Asteroids, Comets Dust and Gas
Moon passes through the shadow of the Earth (longer duration)
Patterns of brighter stars
Moon phases in front of the sun
Integrated set of statements used to explain natural phenomena
The study of the stars
Site at which one or more telescopes have been constructed
94% of astreoids are found between
Jupiter and Mars
Smaller bodies in between planets, defined as any rocky-metallic ojects less than 100 meters in size
While heated to incandescence by atmospheric friction during their passage through atmosphere
A fragment that survives to hit the ground
(increasing illimination) 1st quater to full
New moon waxing
Less than half is illuminated by sunlight
Between full and quarter
Mercury has 38% the gravity of Earth
Mars has 37% the gravity of earth and the lowest in the solar system.
Venus has 90% the gravity of earth.