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Water vapor is an example of
Which is an example of a chemical change?
wood that has burned to ashes
paper that is cut into pieces
ice that melts into water
clay that is rolled into a ball
When heat is added to matter, what happens to its particles?
They move slower.
They move closer together.
They move faster.
They do not change.
Why is seawater considered a solution?
It is made up of sand and water.
Salts are dissolved in water.
It is a mixture of salt, sand, and water.
The salt in the water can be separated by hand.
Ice is an example of a
Which tool would you use to measure mass?
Which object would be most likely to rust?
a glass marble
an iron nail
a plastic comb
a paper cup
Which answer makes a correct statement?
Physical change only changes the size.
Physical change only changes the color.
Physical changes begin and end with the same matter.
Physical changes change the matter into something totally different.
If enough heat is taken away from a container of water, what will happen?
It will begin to boil.
It will become a solid.
It will turn into a gas.
It will increase in weight.
A student is investigating chemical changes by using different materials. Which investigation would provide evidence of a chemical change
Melting a solid with fire would provide evidence of a chemical change because the solid would change shape.
Cutting cardboard into many smaller pieces would provide evidence of a chemical change because the pieces cannot be put back together.
Placing a solid into hot water and stirring while the solid dissolves would provide evidence of a chemical change because the dissolved material is lost.
Combining two liquids that give off heat and gas would provide evidence of a chemical change because the particles react to make a new material with different properties.
Which investigation would provide evidence of a chemical change?
Spray perfume into the air, and when the air and perfume mix, observe the change in odor that happens as they mix.
Put an antacid tablet in water, and when the antacid and water mix, observe the bubbles that form as a new substance is created.
Heat water in a pan on a stove, and observe the steam that forms as the state of matter of the water changes.
Blow air through a wand filled with soap solution, and observe the bubbles that form as the air becomes trapped.
An example of water changing its state of matter is
mixing water and cooking oil
building a snowman
steam rising from a kettle