Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

SCIENCE EXAM

ESS CHEM BIO

What do Aboriginal people look for in the night sky. Dark Patches between the star E.G Emu in the Sky in Milky wave
Constellations Group of stars in a recognisable pattern when viewed from Earth
Two ways the Emu in the Sky guides the actions of the aboriginals. April-May, Running, Breeding Seasons, Emu lays eggs Jun-Jul, Sitting, Don't collect eggs, Prepare for Summer ceremonies
What is the difference between a star, planet, moon and asteroids Star is a giant ball of glowing gases (hydrogen + helium) pulled together by Gravity and undergoes nuclear fusion to emit energy as light. Nebulae (clouds of dust and gas). Remaining material condenses and is affected form planets, moons and asteroids.
What role does gravity play in the structure of the universe. Holds galaxies together. Spiral Galaxy is ours. irregular, elliptical
Stars appear to move. Stellar Parallax Error. The apparent shift of nearby objects compared to distant objects. helps calculate the distances of stars from Earth using observation points on either side of the Earth.
Brightness of a Star Apparent Magnitude. How bright an object appears to be from Earth. Sun has a higher apparent magnitude than other stars. Absolute Magnitude. How bright an object actually is. Measure the distance from Earth. Sun is not as bright as other stars.
Colours of Stars Blue star is hottest, brightest and largest Red star is cooler, dimmer and smaller. Determined by stars surface temperature.
Light Years Used to measure distance in the universe. The distance light travels in a year. Light travels at 300 000km/s 1 Light Year is 9 500 000 000 000km.
Galaxy a group of stars held together by gravity.
Astronomy used to tell stories, seasons, directions
Why do stars turn into giant/supergiants as they get older. With age, the hydrogen and helium in stars fuse with other elements (lighter or heavier depending on mass), releasing more energy making them brighter but lose energy faster. This makes them expand.
What is the difference between a white dwarf and neutron star? White Dwarf: Core of a star after the layers (planetary nebulae) drift off. Ran out of fuel (no fusing) and is small + dense. Neutron Star. Extremely dense, once atom is heavier than Earth. Aftermath of a Supernova.
What has to happen for a Blackhole to form? If the neutron star is too big it will continue to collapse onto itself into an infinitely small point, creating a gravity field so great nothing can escape it.
Sequence of stages of a Star Nebulae (clouds of dust and gas) Forms a Protostar under the force of Gravity, nuclear fusion commences in the core with H Main Sequence Star When H in consumed, star will burn He to form C, N, O and grow in size, release energy and cool slightly.
Sequence of stages of a Low Mass Star Burns He Grows into Red Giant When old, (fuel depleted) outer layer drifts away as Planetary Nebulae and leave behind a core that is a White Dwarf. May become a Black Dwarf. but is only theorised.
Sequence of stages of a High Mass Star Burns He (and heavier elements) grows in Red supergiant When old, (fuel depleted) will undergo a Supernova explosion (shockwave). Leave behind an extremely dense core: Neutron Star If Neutron Star is large, a blackhole will commence,
Big Bang Theory led to the structure of the observable Universe. The Big Bang.
Big Bang Theory led to the structure of the observable Universe. Stars creation. (also search up photons)
Big Bang Theory led to the structure of the observable Universe. The Doppler Effect.
Big Bang Theory led to the structure of the observable Universe. Red Shift.
Big Bang Theory led to the structure of the observable Universe. Cosmic Microwave Background.
Geological Carbon Cycles
Biological Carbon Cycles
Carbon Sinks
The 4 spheres.
Carbon Cycle
Compare Speed of Bio and Hydro
Two consequences of rising atmospheric CO2
Scientist thoughts.
Natural greenhouse effect
Enhanced Greenhouse effect
EVOLUTIONARY THEORY AND THE DIFFERENT PEOPLE AND SUCH
CHARLES DARWIN
ALFRED WALLACE
Created by: St4dent
Popular Science sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards