How do you measure the volume of an irregular object?
Submerge the object in water in a graduated cylinder.
100
The ability to do work or cause change describes_____________.
energy
100
A substance is a single kind of matter that has a specific composition.
True
200
Dissolving salt in water is an example of what kind of change?
Physical change.
200
Soil, a salad, and sugar water are all examples of a _______.
Mixture.
200
Why is the Statue of Liberty green?
Oxidation
200
chemical
Burning wood is an example of a ________________ change.
200
The basic particle of an element is called an atom.
True
300
How do liquid water, ice, and water vapor differ from each other?
They are different states of matter.
300
A group of two or more atoms that are held together by chemical bonds is called _____________________.
A molecule
300
A volume of 25 cubic milliliters is the same as the volume of _____________________________.
25 cubic centimeters
300
Fireworks exploding and giving off light is an example of an_________________________.
Exothermic change
300
To find the mass of a rectangular object, you multiply the objects's length, width, and height.
False
400
Hardness, texture, color, and freezing point are examples of____________________.
Physical properties.
400
How could you find out whether an unknown liquid is water.
Answers will vary. Teacher will decide if it is reasonable.
400
How do you find the density of a rectangular object and an irregular object?
You multiply the L x W x H to find the density of the regular object and you submerge the irregular object in a graduated cylinder to find its density.
400
The fact that matter is neither created or destroyed in any chemical or physical change is called the ___________________________.
Law of conservation of mass
400
A substance that undergoes a chemical change is still the same substance after the change.
False
500
Is the melting point of ice a physical or chemical change?
Physical Change
500
Reaction B
What Reaction is endothermic?
500
What happened to the temperature in Reaction A and in Reaction B?
Reaction A increased and Reaction B decreased
500
A change that produces one or more new substances is called__________________________.
Chemical Change
500
What released exothermic energy in the lab and what received endothermic energy?
the marshmallow gave off energy (exothermic)
the can received energy (endothermic)