Is this a mixture or solution: salt water
solution
What does the law of conservation of matter say? Explain what it means.
Matter cannot be created or destroyed. It can only change from one form to another.
Is this a physical or chemical change: melting
physical
Is this a mixture or solution: metal alloys
solution
Which state of matter has a changing shape but a definite volume?
liquid
Is this a physical or chemical change: crumpling paper
physical
Is this a physical or chemical property: luster
physical
Is this a physical or a chemical change: iron rusting
chemical
When two clear liquids are mixed a yellow solid appears at the bottom. How many new substances were formed?
One
Is this a physical or chemical property: the ability to react with oxygen
chemical
A solution of two metals mixed perfectly together is called...
an alloy
Is this a physical or chemical change: smashing a brick
physical
True or false: the particles in a solid don't move
False - they vibrate slowly in place
Is this matter or not matter: air
Matter
What scientific tool would you used to measure length?
A ruler or meter stick
A stick of butter weighs 500 g. What will happen to the mass of the butter when it melts?
The mass will stay the same.
Which state of matter has the particles with the most energy?
Gas
Is this a physical or chemical property: solubility
physical
What does something need in order to be considered matter?
It needs to take up space and have mass.
Which state of matter has a definite shape and a definite volume?
solid
Is this a mixture or solution: cake mix
mixture
Is air matter? Explain your answer.
Yes - Air is matter because it takes up space and has mass.
Is this a mixture or solution: M&Ms
mixture
Is this a physical or chemical change: wood rotting
chemical
Is this matter or not matter: a pencil
matter
If you put a drop of food coloring in water and don't mix it, why will all of the water eventually turn the color of the food coloring?
The water particles are constantly flowing so they move the color around with it until it is evenly spread out.
Why is a tossed salad an example of a mixture?
Multiple things are mixed together, but each part keeps its own identity.
Which state of matter has the slowest particles?
Solid
When something is dissolved, it is usually mixed completely evenly. This makes it an example of ...
a solution
What scientific tool would you use to measure weight?
A balance
Mineral water is water that has different minerals dissolved in it. When a glass of mineral water is left out for a few days, crystals start to form on the glass. How many new substances are formed?
None - the crystals are the solid minerals separating from the liquid.
If you increase the temperature of water, will salt dissolve quicker, slower, or at the same rate?
quicker
Is this a physical or chemical property: flammability
chemical
Is this matter or not matter: sound
not matter
Which state of matter has a changing shape and a changing volume?
gas
Name one way to measure volume.
Measure and multiply length x width x height OR use a graduated cylinder to measure by displacement
Is this matter or not matter: light
not matter
Sally weighs baking soda and vinegar and finds that it ways 50 g. She mixes them together and weights them again and finds that they now weigh 30 grams. Explain what happened.
The total amount of matter is still 50 g (due to the law of conservation of matter), but some of the gas escaped so it was not measured the second time.