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How do you find density?
density = mass/volume
mass/volume = density
What is one tool used to measure volume?
Ruler, Graduated Cylinder
How do you measure mass?
Triple beam balance
Frying an egg is a Physical or chemical change.
Chemical change
If substance A has weak attraction and substance B has strong attraction, which of the following is true about turning a liquid to a solid?
Substance A will require more energy transferred out.
Substance B will require less energy transferred in.
Substance A will require more energy transferred in.
The density of real gold is 19.3 g/cm^3. The mass of a substance is 1158 grams and the volume is 60 cm^3.
What is the density of the substance?
Is the substance real gold?
19.3 g/cm^3
The substance is real gold.
What is the formula for volume?
Length x Width x Height
Mrs. Beaker put 100 grams of ice in a beaker. 1 hour later, she checked on the container and it melted into a liquid. If she were to measure the cup of water, how much would it weigh after 1 hour?
100 grams
Burning leaves is a physical or chemical change
Chemical change
If substance A has a weak attraction and substance B has a strong attraction, then what is true about turning liquids to gasses?
Substance A will require more energy transferred out.
Substance A will require less energy transferred in.
Substance A will require less energy transfered in.
Ball 1: Mass = 7 kg Volume = 6 liters
Ball 2: Mass = 1 kg Volume = 6 liters
One of these balls is a bowling ball and the other is a beach ball. Identify which one of these is a beach ball and which one is a bowling ball based on their density. Make sure to calculate the density of these two balls using kg/liters^3.
Ball 1: Bowling Ball Density = 1.6 repeating kg/liters^3
Ball 2: Beach Ball Density = 0.14 ... kg/liters^3
If you burn wood, does the mass or volume change?
Volume
What is the law of conservation of matter?
- Matter cannot be created or destroyed
- Matter can be transformed/phase changed
- In a chemical reaction, the amount of matter stays the same (the mass). But the molecules can change the arrangement and become a new substance.
Shooting fireworks is a physical or chemical change
Chemical
If substance A was strong attraction and Substance B has weak attraction, whichof the following is true about turning a liquid into a solid?
Substance A will require more energy transferred out.
Substance B will require more energy transferred out.
Substance B will require more energy transferred out.
What is true about volume?
1. Volume is the amount of matter in an object
2. Volume is the amount of space the matter in an object takes up in the physical world.
3. Volume is the weight of something.
2
How can the water displacement method be used to find the volume of an irregular shape?
You can fill up a graduated cylinder with water and put an irregular object. Then, calculate the increase in the water level in mL.
The water level in a graduated cylinder is 356 mL. After a rock is placed in the graduated cylinder the water level increases to 421 mL. What is the volume of the rock?
65 mL
Boiling water is a physical or chemical change
Physical
If substance A has strong attraction and Substance B has week attraction what of the following is true to turn a liquid to a gas?
Substance A will require more energy transferred in.
Substance A will require less energy transferred in.
Substance A will require more energy transferred in.
Fireworks being set off are physical or chemical property/reaction?
chemical
How do you find the amount of mass of a substance using a triple beam balance excluding the container?
1. Find the weight of the container without any of the substance.
2. Weight the container with the substance inside.
3. Slide the weights on the beams to adjust the height of the plate to 0.
4. Add the tens, hundreds, and ones placed on all of the beams.
5. Subtract the weight of the container by itself from the weight of the container with the substance.
Is melting butter a physical or chemical change
Physical change
Who is your favorite teacher?
Mr Vega (real)