A substance made by mixing other substances together.
What is a mixture?
100
You are conducting an experiment on whether a lack of sleep can make you gain weight. The variable you are looking at is the amount of sleep.
What is the independent variable?
100
A scale that ranges from 0-14 and helps us determine whether a substance is acidic, basic or neutral.
What is a pH scale?
100
A type of change that CANNOT be undone. New matter is created and you cannot retrieve the old matter from the new matter. An example of this would be cooking an egg, fireworks or baking a cake.
What is a chemical OR irreversible change?
100
You are given a tray mixed with flour, popcorn kernels and rice. You will use this tool to separate them, as it is the most appropriate tool.
What is a sieve?
200
Mixtures that are easy to identify because they have large size of their particles. You can see the separate parts.
What is a heterogeneous mixture?
200
The thing that is measured in an experiment. "What I observe".
What is the dependent variable?
200
A substance that has a pH ranging from 0-6. Examples are vinegar, lemon juice, and soda (pop).
What is an acid?
200
A type of change that CAN be undone. The colour or shape may change, but the matter stays the same. An example of this would melting chocolate or freezing ice.
What is a physical OR reversible change?
200
You are given a tray with iron fillings, paperclips and sand. You will use this tool to separate the iron fillings and paperclips from the sand.
What is a magnet?
300
The substances that have the same parts that are mixed together and when things are completely dissolved. You CANNOT see the separate parts.
What is a homogeneous mixture?
300
This variable is something in an experiment that is kept the same. This allows for the experiment to be fair.
What is the control variable?
300
A substance that ranges from 8-14. Examples include soap and oven cleaner.
What is a base?
300
When a substance CAN be dissolved in the solution.
What is soluable?
300
This is the property of the surface of water. This explains why you were able to fit many drops of water on a penny before it spilled over. This also explains why water droplets are round, and why paperclips or needles can sit on the surface of water.
What is surface tension?
400
The stuff that is being dissolved in a homogenous mixture.
What is a solute?
400
A statement on what you expect to happen in an experiment. This is an educated guess.
What is the hypothesis?
400
When we made our rockets in class, we created __________. The creation of this is different what is in our air.
What is carbon dioxide?
400
a liquid mixture in which the substance that you stir in (the solute) is completely dissolved within the the liquid (the solvent).
What is a solution?
400
A solid material where molecules fit together in a pattern and form unique shapes over time. Examples are seen in sugar and salt.
What is a crystal?
500
The stuff that is doing the dissolving in a homogeneous mixture.
What is a solvent?
500
You are conducting an experiment on whether tomato plants grown with music have more tomatoes. The variable you are looking at is the number of tomatoes.
What is the dependent variable?
500
The process how scientists correctly arrive at new knowledge, and update their previous knowledge. It consists of systematic observation, measurement, experiment, and the formulation of questions or hypotheses.
What is the scientific method?
500
When a substance CANNOT be dissolved in a solution
What is insoluable?
500
I have a mixture of sand and water. I want to separate the sand from the water, and this tool will help me do it best.