Today is: Thursday, September 15th9/15/2016 #thinkaboutitthursday

1. What does this rebus puzzle mean?2. Riddle: I’m tall when I’m young and short when I’m old.

What am I?

Science News: What happens when you’re struck by lightning?

http://safeshare.tv/x/fhjx6lGTDhw

3. What is lightning? What happens when you are struck by lightning? Summarize today’s news in 3 complete sentences.

Agenda:● Volume,

Mass, Weight, Density

Last Class:● Kahoot● Classification

of Matter Quiz

Next Class:● Density Lab

Learning Target:● I can explain and calculate density.

Physical Properties of Matter

Volume, Mass, Weight, Density

4 3 2 1

In addition to mastering level 3, I make in-depth inferences and applications that go beyond what was taught in class.

I am able to classify:

● Physical properties (states, density, boiling point, melting point, solubility)

● Chemical properties (reactivity, pH, acid/base/neutral, oxidation)

● Physical Changes (i.e., phase change)

● Chemical Changes (i.e., color change, endothermic, exothermic, generation of a gas, precipitate)

I am able to explain: ● how the transfer of energy

can affect the physical/chemical properties of matter.

I can define the following terms:

● Physical property

● State (solid, liquid, gas)

● Density

● Boiling point

● Melting point

● Solubility

● Physical Change

● Phase change

● Chemical property

● Reactivity

● pH, acid, base, neutral

● oxidation (corrosion)

● Chemical reaction

● Color change

● Generation of gas

● Precipitate

● Endothermic reaction• Exothermic reaction

With help, I can perform at level 2.

I am able to identify: matter based on physical/chemical properties, the evidence of a physical/chemical change and how the transfer of energy affects the physical/chemical properties of matter.

Volume and MassSome physical properties of matter can be measured exactly. Two such properties are volume and mass.

Volume

▪ is the amount of space a substance occupies.

▪ is typically measured in cubic centimeters (cm3) or milliliters (mL).

Mass

▪ is the amount of matter that makes up a substance.

▪ is typically measured in grams (g) or kilograms (kg).

Physical PropertyCan be observed or measured without changing the chemical identity of matter. Physical properties are used to observe and describe matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, and many others.

Weight

× Usually, if people ask you how much you weigh, they really mean to ask what your mass is. The weight of a substance is determined by two factors: the mass of the substance AND the force of gravity acting on it.

× For example, astronauts walking on the Moon have the same mass they have on Earth, but their weight is much lower because the Moon’s gravity is weaker than Earth’s. If you went aboard the International Space Station, your mass would be the same but you would be practically weightless. Because weight changes with location, it is not considered to be a property of an object.

If you throw a rock into a pool, what will happen?

What if you throw a piece of wood?

Why do you think this happens?

Big

Density

DensityDensity is defined as the ratio between mass and volume. It is a measure of the degree of compactness of a substance.

Density× Density is a physical property of a

substance.× The density of a substance is the

relationship between the mass and how much space it takes up (volume).

× The mass of atoms, their size, and how they are arranged determine the density of a substance.

× Density equals the mass of the substance divided by its volume.

× D = m/v.× Objects with the same volume but

different mass have different densities.

Water has a density of

1 g/cm3.

Density

mass

volume

Liquid

What state of matter do you think is the LEAST DENSE? why?

Solid Gas

Place your screenshot here

How do hot air balloons work?

Place your screenshot here

Energy transfer affects physical properties of air inside a hot air balloon because the air's density increases and decreases with addition or reduction of heat/energy.

Practice calculating density

1. What is the density of a piece of wood that has a mass of 25.0 grams and a volume of 5 cm3?

2. What is the density of an object with a mass of 120g and a volume of 6mL?

3. A piece of wood that measures 3.0 cm by 6.0 cm by 4.0 cm has a mass of 80.0 grams. What is the density of the wood? Would the piece of wood float in water? (volume = L x W x H)

Academic Lab

Adopt an Element Project

Element Cards

*Due AcLab the last week of Q1.*