Show:
Chemistry Is The Study Of Matter
Atoms & Molecules
Kinetic Energy
& Conduction
Dry Ice
Density
100
What is matter?
Matter is all the physical things in the universe.
100
What is an atom?
An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element.
100
What is Kinetic Energy?
Kinetic Energy is the energy of a moving object.
100
What is Dry Ice?
Dry ice is the solid form of carbon dioxide and it has fascinating behaviors and unexpected ways.
100
What is Density?
Density is defined as mass per unit volume. It is a measure of how tightly packed and how heavy the molecules are in an object.
200
True or False? Silver is not an example of a molecular compound.
True
200
What is a molecule?
Molecules is a group of atoms bonded together, making the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
200
True or False? If the speed of an object decreases, its kinetic energy increases.
False
200
How cold is dry ice?
­Dry ice is frozen carbon dioxide. A block of dry ice has a surface temperature of -109.3 degrees Fahrenheit (-78.5 degrees C).
200
How is Density measured? How is Mass measured? How is Volume measured?
1. To find Density you first must find the mass of the object, then find the volume of the object, and last divide them both. Density = Mass(g)/Volume (cm³) 2. Mass is measured by the amount of matter (or stuff) in an object. Measured in grams (g) by using a scale. All three states of matter have mass. 3. Volume is measured in milliliters (mL) or centimeters cubed (cm3). Rectangular shaped object can be measured by calculating length x width x height. Irregular shaped objects can be measured by using water displacement.
300
Atoms or molecules are attracted to one another is which state of matter?
A liquid state.
300
True or False? Moving atoms and molecules have energy.
True
300
What is Conduction?
Conduction is the process of transferring energy by direct contact.
300
Who was the founder of Carbon Dioxide and other common gases such as oxygen.
A Chemist from Belgium named Jan Baptist van Helmont(1580-1644) discovered Carbon Dioxide in the early 1600’s. He was also the first person to use the word “gases” when dealing with Carbon Dioxide and other common gases.
300
True or False? Hint (Change mass and keep the volume the same) Increasing mass will decrease density and decreasing mass will increase density.
False
400
Matter is made up of particles. Which statement is true about these particles. A. The particles that make up solids do not move. B. The particles that make up liquids do not move. C. The particles that make up all matter are constantly in motion. D. The particles that make up gases are constantly in motion.
C.
400
1. What is water vapor? 2. How is water vapor formed?
1. Water vapor is the gaseous phase of water. It is one state of water within the hydrosphere. 2. Water vapor can be formed from the evaporation, boiling of liquid water, or from the sublimation of ice.
400
True of False? Will atoms in a spoon transfer all of their energy to the molecules in a cup of water?
False
400
1. How long has Carbon Dioxide dominated the Earth? 2. Could we live on Earth during that time and why?
1. Carbon Dioxide dominated the Earth’s atmosphere 4.5 billion (4,500,000,000) years ago. 2.Living on Earth during that time would have been impossible because there was not enough Oxygen for us to breathe.
400
How do liquid layers work?
Liquids layer work by pouring together liquids that don’t mix and have different densities, then it will form liquid layers. The layers go by the liquid with the lowest density will be on the top and the liquid and with the highest density will be on the bottom. The objects with more density will sink below objects then the substances with less density.
500
1.When a gas changes into a liquid is called what? 2.When solids reach their melting points they become what? 3.When gas reaches its condensation point, it becomes a what? 4.What is it called when a solid changes directly into gas?
1. Condensation 2. Liquids 3. Liquids 4. Sublimation
500
What happens to the molecules in a liquid?
Atoms or molecules are attracted to one another, but not as attracted as a slid and more attracted than a gaseous state. It vibrates but are able to move past one another. A liquid state have definite volume, but does not have definite shape.
500
What is a melting point? What is a melting point for sugar, table salt, lead, iron, and glass?
A melting point is the temperature at which a substance begins to melt. The melting point for sugar is 186 C, table salt is 801 C, lead is 327 C, iron is 1,538 C, and glass is 1,200-1,600 C. Glass has a range as a melting point because it is not arranged in a crystalline structure.
500
What are three examples of how Dry Ice is used?
1. To carbonate Liquids by adding CO2 to plain water, then it will make sparkling mineral water. 2. CO2 may attract mosquitoes away from animals and people. Place pieces of dry ice away from areas where people are congregating. 3. Dry Ice will replace oxygen in a container preventing or putting out fires. It is used to safely remove underground gas storage tanks.
500
1. What is the largest Atomic Size Element out of Hydrogen, Helium, Lithium, Sodium, Aragon, Potassium, and Calcium? 2. What is the smallest mass Element out of Hydrogen, Helium, Lithium, Sodium, Aragon, and Potassium?
1. Potassium is the largest Atomic size. 2. Hydrogen=1.01 is the smallest mass.