7.1
What factors does weight depend on?
Mass, gravity
Why can we see planets?
Because they reflect sunlight
Basic process through which sun releases energy?
Nuclear Fusion
Which law deals with inertia?
1st
Speed = distance / _________
time
Gravitational force gets weaker as __________increases
Distance
What is an astronomical unit? (Give actual number)
150 million km
What galaxy do we live in?
Milky Way
Which law deals with action-reaction principle?
3rd
If a car is moving at 40 mph, how long will it take to travel 80 miles?
2 hours
How many times does the tide rise in a 24 hr period?
2
Which planet looks brightest in the sky?
Venus.
Outermost layer of the sun's atmosphere
corona
Newton's second law says that an object with more mass requires more _________ to move it.
Force
If a car travels 150 miles in 3 hours, what is its average speed?
50 mph
Gravity gets stronger as the ___________ of an object increases.
Mass
What planet is closest to the earth in size, gravity, & composition?
Venus.
What color are the hottest stars?
blue
Force = mass x _______________
acceleration
How far can a plane fly if it travels at 300 mph for 6 hours?
1800 miles
Earth's direction of gravitational force is towards the ___________________ (direction)
Center
Which 3 planets rotate backwards?
Pluto, Uranus, & Venus
If a star is 200 light years away, the light we see was actually produced in what year?
1819
Acceleration due to gravity is how much?
9.81 m/s^2
If a car travels 240 miles in 3 hours, what is its average speed?
80 mph