What is the region on a magnet where forces are strongest?
Magnetic Poles
100
What type of change takes place when iron rusts?
What is a chemical change?
100
What tool is used to measure mass?
a balance
100
What is best used with a bar magnet to produce an electric current?
A wire coil
200
Which scientist is credited with discovering gravity?
Isaac Newton
200
If the magnetic field of Earth were to reverse, in what geographic direction would a compass point?
South
200
What type of change takes place when water goes from a solid state to a liquid state?
physical change
200
Weight = mass x ___________
gravitational force
200
A student coils a copper wire around a bar magnet. Which action will cause the device to generate electricity?
Moving the magnet back and forth along the wire
300
What is the constant force of gravity on Earth?
9.8 m/s^2
300
How do you make an electromagnet stronger? List 1 way!
add more coils of wire or add more power
300
The name of the elements or compounds that enter into a chemical reaction.
Reactants
300
Describe what will happen (if anything) to mass and weight when you go to the moon.
Mass will stay constant, weight will decrease since the gravity is less on the moon
300
Groups of atoms with aligned magnetic poles are referred to as ______________________.
magnetic domains
400
What is the force of gravity on the International Space Station?
0
400
What is created when you run a bar magnet through a coil of wire?
electric current
400
The name of the principle stating that the total amount of matter is constant during any physical or chemical change (matter is neither created nor destroyed during these types of changes).
The law of conservation of mass
400
Find the weight of a 60 kg astronaut on earth in N.
588 Newtons
60*9.8m/s^2=588
400
One of your fellow student asks why the ashes from a fire have a much lower mass than the wood that was burned. How would you answer their question?
Some of the mass has been converted into light and heat energy in the fire since this is a closed system.
500
What causes gravity?
Mass
500
A magnetic field causes domains to ______________________.
align
500
The name of the numbers written below the line that tell how many atoms of a given type are in a compound.
Subscripts
500
A backpack weighs 8.2 newtons and has a mass of 5 kg on the moon. What is the strength of gravity on the moon? (Be careful with units, remember 1N= 1 kg * m/s^2)
1.64 m/s^2
8.2=5kg* ?m/s^2
divide both sides by 5 -> 1.64=m/s^2
500
An iron block had an initial mass of 100 grams. As the block rusted, its mass increased. What best explains why the mass increased?