Matter is defined as anything that _____________________________________.
What is has mass and takes up space?
100
Properties that can be observed without changing the identity of the substance.
What is a physical property?
100
An apple rotting.
What is a chemical change?
100
A substance that has no definite shape or volume.
What is a gas.
100
The logical steps that are used when figuring out the answer to a problem.
What is the scientific method.
200
This is the basic unit of all matter.
What is the atom?
200
This is the property that allows a substance to change into something new.
What is a chemical property?
200
Cutting your nails.
What is a physical change?
200
Wires are made of metal because of this physical property.
What is conductivity (electrical).
200
Draw the atom structure for a solid, liquid, & a gas.
What is very close together (solid), a bit further apart (liquid), and very far apart(gas).
300
Traits used to describe a piece of matter. (hint: there are 2 different types)
What is a property?
300
List five different physical properties.
What is: density, solubility, state of matter, magnetism, boiling & melting point, conductivity, mass, weight
300
This happens at the molecular level of matter and produces a new substance.
What is a chemical change?
300
Name the signs of a chemical change that would be present while you are making pancakes.
What is, change of color, new odor (gas), new substance.
300
Make one observation and one inference about something in the room.
What is ... answers will vary.
Observation must be something that is noticed (Jamie has her head down).
Inference must be the conclusion based on the observation(Jamie is tired).
400
These changes occur as a substance goes from a liquid to a solid.
What is the atoms get closer together (more dense) and move less?
400
This is the property that is the same no matter the size of the substance and is defined as the mass per unit volume.
What is density?
400
You noticed that the small pond in your backyard had water in it two weeks ago and it no longer does. Your friend said it underwent a chemical change but you disagree. Defend your position.
What is the water simply evaporated and became a gas. This is a physical change because the molecules that make up the water have not changed, they have just gotten further apart and are moving faster.
400
Why is mass considered a size dependent property?
What is, as the size of an object changes so will its mass. larger rock = more mass
smaller rock = less mass
400
Lucy and Sebastian were trying to determine if one pair of soccer cleats were going to improve Sebastian's game more than another style. Sebastian went through the same drills 5 times each with both sets of cleats on. He found that there was no difference in his performance. What is the independent variable in this situation?
What is the different style of cleat.
500
This is the law that explains that matter is equivalent before and after a change. (hint: think about the baking soda and vinegar)
What is the law of conservation of mass?
500
Explain why the ability to rust is a chemical, rather than a physical, property.
What is rusting will create a new substance so therefore the property can only be observed by changing the matter at the atomic level & not just superficial?
500
What is the difference between dissolving sugar in water and making cookies with sugar in them? (Provide a complete answer.)
What is, solubility is a physical change because the sugar & water have not made something new. However, when cookie dough is baked a new substance is formed (cookies) with all new properties.
500
You have found a clear crystal. Explain which properties would be the best to determine if this was a valuable diamond or a cheap rhinestone.
What is, density because substances have one specific density; melting point because each type of matter melts at one specific & unique temperature.
500
Two objects are placed in a tank of rubbing alcohol. One object floats very high on the liquid and the other one sinks. What can you determine about these substances?
What is, the object that is floating has a lower density than the object that sunk. Also, the floating object has a lower density than the rubbing alcohol and the one that sunk has a density that is higher than the rubbing alcohol.