Phase Changes
What are the three states of matter?
Solid, Liquid, Gas
What chart shows the 118 different types of atoms that we currently know about?
The Periodic Table of Elements
An organism that hunts and kills another organism for food.
Predator
The ability to move or cause change
energy
a push or a pull on an object
Force
When a substance changes from a solid to a liquid.
Melting
Two or more atoms chemically combined
A relationship where two organism fight over the same resources
Competition
What factors increase gravitational potential energy?
Mass and Height
Boat A has a mass of 500kg, Boat B has a mass of 650kg. Which boat will take more force to change its velocity?
Boat B
When you add more thermal energy to a substance, its particles...
move faster and spread apart.
The total number of atoms before a reaction should be...
The same as after a reaction
Give an example of a limiting factor for a population
Food, Shelter, Space, Water, Number of mates.
What factors increase kinetic energy?
Mass and Velocity
To change an object motion to the opposite direction you must...
Apply more force than it was already given in the opposite direction.
The three types of heat transfer and define each
Conduction = by touch
Convection = by moving fluids
Radiation = through space
A chemical reaction that creates heat
Exothermic
Explain how scientists estimate the population of specific organisms that they research.
Scientists sample the organisms in several places in an area then make an estimate based on the total area available.
What are the equations for kinetic and potential energy?
KE = 1/2mxV2
PE = mgh
When the net force on an object is greater than 0N
Unbalanced forces
When two objects in contact with each other reach the same temperature.
Equilibrium
How many atoms does this molecule contain?
H2C6O7S
16 atoms
What are the three types of symbiosis? Explain each using smiley faces
Mutualism = Happy Happy
Commensalism = Happy Don't Care
Parasitism = Happy Sad
The law of conservation of matter, write it.
Energy is never created or destroyed, it just changes forms.
A golf ball is hit with 100N of force by a mechanical swinging machine. It moves with an acceleration of 4m/s2.
If we replace that golf ball with one 1/8 the size and let it get hit by the machine. What will its acceleration be?
32 m/s