States of Matter
What is the name of the phase change of liquid to gas?
Vaporization
What is the formula for density?
D = mass/volume
Using the rock cycle diagram, which leads to the formation of igneous rock?
Melting and solidification.
Answers will vary.
What's the difference between a physical and chemical change?
Physical= changes what it looks like but not what it's made of.
Chemical = new substance created!
Which two phase changes represent a decrease in the motion of molecules?
Condensation and freezing.
Why does oil float on top of water?
It's less dense than water.
What type of rock is formed from weathering and erosion?
Sedimentary rock
What is the difference between an atom and a compound/molecule?
Atom is the smallest piece of matter made up of protons, neutrons, electrons. Compounds are when atoms chemically bond together to create a new substance with different properties.
Chemical vs physical PROPERTY
Physical property - describing things about it (color, shape, texture, density)
Chemical property - describing the ability to make something new (flammability, ability to rust, ability to react)
Draw a particle diagram of solid, liquid, and gas.
See pictures.
Why does a block of concrete has a higher density than the same sized block of wood?
Concrete has more or heavier particles compared to that of the wood, which means it has a higher density.
Weathering and erosion is primarily caused by what?
Gravity
Draw an atomic model of Carbon.
Draw....
Describe the Law of Conservation of Mass.
Matter (atoms) is not created or destroyed, only rearranged to form something new. The number of atoms is the same on both sides of the equations.
12 Hydrogens on reactants = 12 hydrogens on products
Compared to the particles in a solid lava sample ,the particles in a liquid lava sample have what type of energy?
Higher because liquid particles move faster.
What is mass?
What is volume?
Mass = amount of particles in a substance
Volume = amount of space that substance takes up.
Higher mass, smaller volume = larger density
Give an example of chemical and physical weathering.
Chemical-acid rain
Physical-water and wind smoothing out rocks
Mixture-combo of 2 or more substances that can be separated by their properties. (salt water, salt and sugar, gravel and water...)
Element-single piece of matter (C, N, H)
What's the difference between an observation and an inference. Give an example.
Observation-fact stated using 5 senses.
Inference-guess made based on observation and background knowledge.
Ex: It's sunny outside. It must be hot.
For solids, liquids, gases...complete the following:
What has definite shape?
Which has definite volume?
Which has most energy?
Solids have definite shape.
Solids and liquids have definite volume.
Gas has most energy.
Why does any object sink in any liquid?
Sinks when it's more dense (higher number) than the liquid.
Pangea-what evidence proves it once existed?
How did it move apart?
Where does the energy come from for this movement?
Fossils, shape of continents, mountain ranges, continental shelves.
New rock rises at the ridges, old rock sinks at the trenches (plate tectonics).
Inner core.
How many protons, neutrons, electrons does gold have?
What group and period is gold in?
79 protons
79 electrons
118 neutrons
Group 11, period 6
Determine if this chemical equation follows the Law of Conservation of Mass. If yes, explain why. If no, explain why not.
CH4 + O2 --> CO2 + H2O
No. The number of atoms are different on each side of the equation. In order for it to follow Law of Conservation of Mass, there needs to be the same number of C, O, and H on both the reactant and product side of the equation.