Gravity And Astronomy Flashcards
- What is weight measured of? What tool is it measured with? What is the metric unit?
Measure of gravitational force on an object
Spring scale
Metric unit is newtons
- What is mass? What tool is used to measure it? What is the metric unit?
A measure of the amount of matter in an object
A balance scale
Kilograms grams and milligrams
- How many grams produce a force of 1 N on earth
100 grams
- Between mass and weight, which one always stays the same
Mass
- How much less gravity does the moon exert on matter
6 times less
- If an object has a mass 350 g on earth, what would it’s mass be on the moon
350 g
- If an object has a massive 725 g on earth what would its weight be on the earth
7.25 grams
- If an object had a weight of 15 newtons on the moon, what would its mass be on earth
Come back
- What does the Law of Universal Gravitation state
All objects in the universe attract each other through gravitational pull
- What two things does the magnitude of the force of gravity depend upon
The masses of the objects and the distance between the objects
- Which has the greater gravitational pull: the gravity between two small objects or the gravity between two large objects
Gravity between two large objects
- What happens to the force of gravity when the distance between two objects increases
The gravitational force pulling them together decreases rapidly
- Why does the sun have a greater gravitational pull on Venus then the earth
Venus is closer to the sun
- True/false: on Earth (or any other larger object), everything and everyone is being pulled towards its center
False
- What is the name of the theory of how the universe came to be
The Big Bang theory
- What is a galaxy
A collection of star, dust, and gas bound together by gravity
- How do you galaxies appear to be moving in our universe
The galaxies appear to be moving away from each other and other words expanding the universe
- What is the name and type of galaxy our solar system is in
Milky Way
Spiral galaxy
- Does this galaxy have millions or billions of stars
Billions
- How is a globular cluster different from an open cluster
Globular cluster’s have 20,000 to 100,000 older stars and are located in a spherical halo around galaxies and open clusters have about a few hundred to a few thousand stars and may include blue stars
- What is a nebula
A nebula is a very huge cloud of dust and gas that are birthplaces for star formations
- What two forces work to keep a nebula from collapsing
Gravity and pressure
- When the balance is upset in a nebula, what can form
Solar nebula forms
- What is an astronomical unit? How many miles is an AU?
The average distance between the sun and earth
93,000,000 miles
- What is a light year? How fast does light travel in miles per second
A light year is the distance light travels in one year
186,000 mi./s
- How many light minutes is Earth away from the sun
8.3 mins
- What is a solar system
The sun in 8 planets and other bodies that travel around the sun
- What is the difference between a galaxy and a solar system
A galaxy is large groupings of stars in space and a solar system is the sun and planets and other bodies that travel around the sun
- List the 4 terrestrial planets. List the gas giants
Terrestrial Mercury Venus Earth Mars
Gas giants Jupiter Saturn Uranus Neptune
- The largest planet in our solar system is
Jupiter
- List the planets in order from the sun outwards hint: my very educated mother just served us nachos
Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune
- What is an asteroid
small rocky bodies that orbits the sun they range in size from a few meters to more than 900 km in diameter
- Between what two planets can the astroid belt be found
Mars and Jupiter
- What is a comet
A small body of ice rock and cosmic dust that forms a tail when falling an elliptical orbit around the sun
- What is the difference between a meteor and a meteorite
A meteor burns up in Earth’s atmosphere and a meteorite reaches earth surface without burning up completely
- What gives the moon and other planets their light
The sun
