List three properties of matter we have discussed in class
What are mass, volume, weight, magnetism, density, or conductivity?
100
What are the three states of matter?
What are solids, liquids, and gases?
100
List one similarity between mixtures and solutions as well as one difference.
Both mixtures and solutions are made up of substances.
In mixtures the substances don't mix and they are easy to separate. In solutions the substances completely mix and they are very hard to separate.
100
What do we mean when we talk about a material being able to conduct? What is conductivity?
Conductivity refers to the ability of an object to transfer or transmit energy from source A to source B.
100
What type of shoes should you always wear in lab?
What are closed-toed shoes?
200
What is density? How do we test it?
How densely (tightly) packed an object's matter is. The amount of matter in an object's volume.
You test it by doing a "sink or float" experiment.
200
In which state of matter are the particles moving the fastest? The slowest?
Particles move the fastest in gases.
Particles move the slowest in solids.
200
What are substances?
The "ingredients" in a mixture or solution - the "things" which you mix together.
200
An object can be a conductor or a __________. Define each one.
Insulator.
A conductor allows the flow of energy and an insulator does not (either electrical or thermal).
200
What are the steps of the scientific method?
1. Observation & question
2. Hypothesis
3. Experiment
4. Collect data
5. Analyze data
6. Conclusion & sharing
300
What is the difference between mass and weight?
Mass measures how much matter there is in an object, while weight measures the gravitational pull on that object - think spring scale.
300
What is the melting point? The boiling point?
The melting point defines matter going from solid to liquid.
The boiling point defines matter going from liquid to gas.
300
Give examples of solutions and mixtures.
Mixtures - cereal and milk, salad, sand and water, or trail mix.
Solutions - coffee and sugar, salt and water, sugar and water, coke.
300
Which two types of energy did we talk about in class regarding conductors and insulators? Define each one.
Electrical energy - the energy of electricity
Thermal energy - the energy of heat
300
What should you always do first if you see a fire in the lab?
Report it to your teacher.
400
Define volume
What is the amount of space matter takes up?
400
Describe how volume/shape behaves in the different states of matter.
Solids have a defined and definite volume and shape.
Liquids have a defined volume, but they adopt the shape of their container.
The volume of a gas will vary depending on the container. They fill the entire container.
400
What can you observe to determine if you have solution or a mixture? (Hint: think of what happens after you mix your substances).
In a mixture, after you mix the substances, you can still see them separately.
In a solution, after you mix the substances, you cannot distinguish one from the other.
400
Is a conductor of thermal energy always a conductor of electrical energy? Give an example.
No, not necessarily. Glass is a conductor of thermal energy, but not of electrical energy.
400
What should you do if you see a fire in the lab?
Report it to your teacher immediately.
500
Describe how magnets attract (or repel). Give 2 examples of magnetic materials.
Like magnets repel, and opposite magnets attract.
A paper clip and a iron nails are both magnetic.
500
In which state of matter are the particles the closest? The farthest apart?
In solids the particles are the closest.
In gases the particles are the farthest apart.
500
What may happen to the physical properties of substances when they become a solution? A mixture?
Substances will undergo changes in their physical properties after they go into a solution - think of the lemonade.
Substances will not go undergo changes in their physical properties after they go into a mixture.
500
Give examples of conductors and insulators.
Conductors - copper, paper clip, aluminum, steel, glass (only for thermal energy).
Insulators - rubber, cotton, wood, plastic paper, glass (only for electrical energy).
500
What is a hypothesis?
A hypothesis is an educated guess you make before conducting your experiment. Your hypothesis should be based on your prior knowledge and observations.