This alters the form of an object but not its substance.
What is a physical change?
100
Anything that has mass and volume is made up of this.
What is matter?
100
This is a physical combination of substances that remain the same.
What is a mixture?
100
A mixture of sugar dissolved in water is an example of this.
What is a solution?
100
This is formed by the combination of two or more elements.
What is a compound?
200
This occurs when atoms break their old links and form new links with other atoms.
What is a chemical reaction or chemical change?
200
This is a mixture with parts that are must small enough not to form layers. Example: mayonaisse
What is a colloid?
200
This consists of two or more atoms joined together as a single particle.
What is a molecule?
200
This is a material that cannot be broken down into anything simpler by using chemical reactions.
What is an element?
200
The amount of mass for each milliliter of a substance is known as this.
What is density?
300
This describes the space taken up by an object?
What is the volume?
300
All matter is made up of this.
What are atoms?
300
The heaviest part of an atom.
What is the nucleus?
300
Why scientists measure and record the mass of objects rather than the weight.
What is weight depends on the pull of gravity, so it changes depending on an object's location while mass remains the same.
300
Cecil poured two liquids into a bowl. The liquids bubbled until all was gone, and a solid remained in the bowl. What is the most explanation of what happened.
What is the liquids reacted chemically to form a gas and a solid?
400
A scientist must handle polluted soil for an investigation. What safety precautions should they take.
What is wear goggles and gloves?
400
People often put sugar in their tea. The sugar will dissolve the fastest when it is what?
What is when the tea is hot?
400
Two liquids with different boiling points can be separated in a process called this.
What is distillation?
400
Mavis safely created a mixture. She notices both parts of her mixture are heterogeneous. Which question should she answer in order to decide whether her mixture is a colloid or a suspension?
What is does the heterogeneous parts eventually settle?
400
This would be the best way to separate a mixture of iron filings, sand, grand, and pebbles.
What is use a magnet to remove the iron filings, then use screens of different sizes to separate the pebbles and gravel from the sand?
500
The temperature at which a liquid changes into a solid.
What is the freezing point?
500
You this when one liquid floats atop another liquid.
What is the liquid on top is less dense?
500
The larger quantity in a solution.
What is the solvent?
500
Two different objects balance on a scale so you know this.
What is they have the same amount of matter?
500
This is used to separate a mixture, usually of liquids.