Chemistry 1
Electricity 1
Chemistry 2
Electricity 2
space/scientists
100
what are the 3 states of matter?
what is solid, liquid, gas
100
is this open or a closed circuit?
what is an open circuit
100
what is a period and a family in the periodic table?
What is a period is a row in the periodic table and a family is a column in the periodic table.
100
how much resistance is in this circuit
Rr=R1+R2+R3
Rr=3 ohms+10 ohms+5 ohms
Rr=11 ohms
there are 11 ohms in the circuit
100
what scientists created the plum pudding model?
what is Joseph John Thompson (JJ Thompson)
200
What is the formula for Density, Mass, Volume
Density=Mass divided by Volume D=M/V
Mass= Density times Volume M=DxV
Volume= Mass divided by Volume V=M/D
200
whats the difference between voltage and current?
what is the difference between voltage and current is voltage is the electric difference between two points and current is the flow rate of the electrons
200
what is matter and how is it classified?
what is matter is anything that takes up space or has mass and its classified as physical or chemical property's
200
what is static electricity?
What is Static electricity is the result of an imbalance between negative and positive charges in a object. They can build up on a surface until they can discharge or release. (ex, When you take your hat of and your hair sticks up)
200
who proposed the geocentric model and who accepted it?
what is Aristotle proposed the model and Claudius Ptolemy accepted it
300
what are two theory's in the particle theory?
all matter is made of extremely tiny particles.
each pure substance has its own kind of particle different from the particles of other pure substance.
particles attract each other.
particles are always moving.
particles at a higher temperature move faster on average than particles at a lower temperature.
300
How is lightning formed?
what is lightning is formed in clouds, its formed when small ice crystals smash into each other causing an electric charge and the ground below the charge is positive and the negatively charged cloud shoots the negative electrons at the ground creating lightning
300
Whats the difference between an Element and a Compound?
what is An Element is a material that consists of only one type of atom ( ex. Gold) and a Compound consists of two or more elements held together by a covalent or ionic bond ( ex. water)
300
If a circuit has 4 light bulbs and the volts of the circuit is 24v how much volts is each light bulb using?
What is 6 volts. 24/4=6
300
Who discovered that atoms have densely packed nucleus packed with protons?
what is Lord Ernest Rutherford
400
What is the Bohr diagram?
what is The Bohr diagram is a diagram that is a planetary model of an atom it has electrons go around like planets orbiting a star, the electrons are farther away from the middle based on their energy level, the higher the energy level the farther away from the middle the electron is.
400
what is the electric field?
what is the electric field is the area around an object where electric force can be exerted onto another object.
400
what is the difference between a chemical and physical change?
what is a physical change is a change that can turn back to its original form and a chemical change is a change with a chemical reaction and it cant be turned back to its original form
400
whats the difference between an open and closed circuit?
what is a closed circuit allows electrons to flow through it and power light bulbs and a open circuit leaves electrons stranded and they cant reach light bulbs to power them.
400
what are the four main layers of the sun?
1. core 3.convection zone
2.radiation zone 4.photosphere
500
What are all of the theory's in the atomic theory?
All matter is made up of small particles called atoms
Atoms cannot be created, destroyed, or divide into smaller particles
All atoms of the same element are identical in mass and size, but they are different in mass and size from the atoms of other elements
Compounds are created when atoms of different elements link together in definite proportions (ie, 2 hydrogen atoms and 1 oxygen atom combine to form water, 2:1 is the proportion)
500
what is the difference between a insulator and a conductor?
what is a Insulator can not conduct charges very well because their electrons cannot flow freely. The electrons are tightly held in the atoms of the insulator(ex.rubber). and a conductor is materials where charges can move easily through them(ex.iron)
500
what is the difference between a homogeneous mixture and a heterogeneous mixture?
what is a homogeneous mixture is chemically combined and is equal through out, you cannot pick out the two or more substances. A heterogeneous mixture is a mixture that is not equal through out and you can pick out and separate the substances.
500
What is grounding?
what is When there is a pole or wire in the ground for a machine to discharge its excess electrons into the ground safely?
500
What two scientist created the word Radioactivity to describe the emission of rays by certain substances?
what is Marie Curie and her husband Pierre invented the term.