Show:
PHYSICAL & CHEMICAL CHANGES
ELEMENTS
MATTER
DENSITY
VOCABULARY
100
If a bike left outside in the rain makes the bike rusty, is it a physical change or chemical change and why?
Rust is a chemical change because the bike cannot be changed back to not being rusty.
100
What is the chemical symbol for Iron?
The symbol is Fe.
100
Explain what matter is AND name the three states of matter.
Matter is anything that has mass and takes up space. The 3 states of matter are solid, liquid, and gas.
100
How do you find the density of an object?
Density = Mass / Volume
100
What is the word for when a solid changes to a gas?
Sublimination
200
When water freezes to make ice. Is this a physical or chemical change? Explain your answer.
It is a physical change because the water is changing its state of matter; it is changing from a liquid to a solid.
200
What is the symbol for Helium and how is Helium used?
The symbol for Helium is He. Helium is most commonly known for being used to fill balloons to make them float. It also has uses in deep sea diving, welding, and filling blimps
200
What are TWO ways that a gas is different from a solid?
1. A gas has particles that are moving very fast 2. A solid has particle that are vibrating 3. A solid has a definite shape that cannot change 4. The gas particles are far apart and the solid particles are very close together
200
You have 40 mL of cheese that has a mass of 60 grams. What is the density?
The density if 60 grams / 40 mL, which is 1.5 g/mL
200
The vocabulary word for changing water to a gas is...
evaporation
300
I took a piece of paper and rolled it up into a ball. Is this a physical change or chemical change. Explain your answer.
It is a physical change because a new substance is not formed. It is just changing its shape. There is no new odor, color or other reaction that occurred.
300
What is an element? Give an example of one element.
An element is one type of pure substance found on the Periodic Table. An example of an element is Hydrogen (H).
300
What are two ways that the states of matter (solid, liquid and gas) are all similar (the same).
-They are all made of particles -They all have mass -They all have volume
300
You have some dish soap, which has a density of 1.20 g/mL and some cooking oil, which has a density of .90 g/ml, that you pour into a beaker. The liquids are NOT stirred. Explain how the liquids will look after one hour.
The liquid that is LESS dense will be on the top layer. This will be the cooking oil. The dish soap has more density and will be at the bottom of the beaker.
300
Describe the relationship between a liquid and a solid. This means, what happens when a liquid turns into a solid and when a solid turns into a liquid? (Be careful! This requires TWO answers).
A liquid to a solid is melting A solid to a liquid of is freezing
400
What are three examples of chemical change properties?
-Odor -New color -Creates bubbling -A new substance is formed
400
Where on the Periodic Table are the Noble Gases? What is most important about the Noble Gases?
The six noble gases are found together in the same group (column) on the periodic table - at the far right of the Periodic Table. They are the most stable (least reactive). The other elements want to be like their nearest noble gas.
400
Describe the relationship between a liquid and a solid. This means, what happens when a liquid turns into a solid and when a solid turns into a liquid? (Be careful! This requires TWO answers).
When a liquid turns into a solid it is freezing, when a solid turns into a liquid it is melting.
400
What would happen if you added pure water to a beaker that has honey on the bottom (1.42 g/mL) and then a layer of dish soap next (1.20 g/mL), and then on the very top of the beaker is oil, with a density of .90 g/mL. When you pour in the the pure water, where would it go?
Pure water has a density of 1 g/mL and would be below the oil, but one layer above the dish soap.
400
I opened a cold can of Coca-Cola outside on a hot day. After a while, water starts to collect on the outside of my Coke can. What is a vocabulary word that describes this?
This is condensation because it is a gas turning to a liquid.
500
Is lighting a match a physical or chemical change? Explain your answer.
Lighting a match is a chemical change because there is a new odor, a change of color, and the burnt match cannot be changed back.
500
Which element group on the Periodic Table is the most reactive? (They like to blow up/explode)
The Alkali Metals. They are located on the far left of the Periodic Table.
500
How do you measure the volume of an irregularly shaped object, like a piece of gold?
Using displacement. Place the gold in a beaker of water. The amount of water displaced (the amount the volume increases), is the same as the volume of gold. Archimedes principal!
500
Layer the liquids from MOST dense to LEAST dense: 1. Milk 1.02 g/mL 2. Alcohol 0.79 g/mL 3. Water 4. Oil .90 g/mL 5. Honey 1.42 g/mL
From MOST dense to LEAST dense, the liquids are: 1. Honey 1.42 g/mL 2. Milk 1.02 g/mL 3. Water 1 g/mL 4. Oil .90 g/mL 5. Alcohol 0.79 g/mL
500
Explain the difference between translucent, transparent and opaque.
translucent is when light can pass through (you can see through it a little) For example a green bottle of Sprite is translucent. transparent is when light can fully pass through and you can clearly see through it. For example a window is transparent, so are my glasses for reading. opaque is when no light can pass through and you cannot see through it. For example, a book or piece of book are opaque.