Show:
Basics
Mixtures
Complete Me
Density
Reactions
100
Which is a physical change? burning paper baking cookies heating table sugar dissolving salt in water
What is dissolving salt in water
100
A substance that or more substances -elements, compounds or both- that are together in the same place but not chemically combined.
What is a mixture?
100
The tarnishing of metal is an example of a(n) ___________change.
What is chemical?
100
Mass divided by Volume
What is density?
100
When you have two or more atoms together you have this.
What is a molecule?
200
Chemical change? filtering burning wood boiling water crushing a can
What is burning wood?
200
A type of mixture where you cannot see the different pieces that make it up. Every looks the same.
What is a homogeneous mixture?
200
Mass is the measure of the total amount of _____________ in any object.
What is matter?
200
The unit used for density.
What is g/cubic centimeter?
200
The chemical formula for the reaction of 2 hydrogens and 1 oxygen.
What is H2O?
300
Give an example of a type of electromagnetic energy.
What is any acceptable answer
300
A mixture where you can see the different pieces, like salad dressing.
What is a heterogeneous mixture?
300
The units, liter, milliliter, and cubic centimeter are all used to measure the _________________ of an object or substance.
What is volume?
300
If you drop a marble into a glass of water, the marble will sink because of what?
What is because it has more density than the water?
300
Fireworks exploding and GIVING OFF light are an example of this type of change.
What is exothermic?
400
Table sugar and table salt are examples of atoms? elements? mixtures? pure substances?
What is pure substances?
400
The smallest particle of an element.
What is an atom?
400
A compound may be represented by a(n) ____________________________________which shows the elements in the compound and the ratio of atoms.
What is a chemical formula?
400
Anything that has mass and takes up space has _____.
What is mass?
400
The change in which ice absorbs energy and melts is a(n) _____________________ change.
What is an endothermic change?
500
Elements are substances that _______________ be broken down.
What is cannot?
500
Two of these will make up a compound.
What are elements?
500
_________________energy, the total energy of all of the particles in an object, always flows from warmer matter to cooler matter.
What is thermal energy?
500
The measurement of the force of gravity on an object is the object's _________________.
What is weight?
500
The internal energy stored in bonds between atoms is from a form of potential energy that is sometimes called __________________ energy.
What is chemical?