Physics Flashcards
What is meant by a day?
A day is the time taken for a planet to spin once around on its axis.
What is meant by a year?
A year is the time take for a planet to complete one orbit around the sun.
In the summer is the northern hemisphere tilted towards the sun or away from the sun?
It is tilted towards the sun.
Why is it colder in Winter?
It is colder in Winter because the Northern hemisphere is tilted away from the sun.
What is a Solar System?
A solar system is a star and all the orbiting bodies.
Name the planets in our solar system starting with the one nearest the sun.
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune.
The moon does not give out light so why do we often see it at night?
Because the sunlight reflects off of the surface of the moon.
Which planet in our solar system should be the hottest and why?
Mercury should be the hottest as it is the closest planet to the sun.
9 a - an exolplanet:
9 b - the sun:
9 c - a star:
9 d - the universe:
9 e - a comet:
is any planet beyond our solar system.
the star in our solar system.
a gigantic ball of gas which radiates energy.
all observable space.
a ball of ice and dust on a long elliptical orbit around the sun.
increasing in size:
planet, solar system, galaxy, universe.
what is a light year and why do we need to use them?
distance travelled by light in one year, it helps us measure long distances.
How long does it take light to reach us from the sun?
8 mins
How is the weight of an object calculated?
w = mg (mass x gravity)
What is the unit of weight?
N = Newtons.
Calculate the weight of a dachshund of mass 5kg, if gravity on earth is 9.8N/kg
w= mg
w= 5 x 9.8
w= 49N
