Worksheets8th Grade Science Review
Total questions: 17
Worksheet time: 9mins
Water vapor is an example of
an atom
a liquid
a gas
a solid
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.
Which tool would you use to measure mass?
balance
ruler
beaker
thermometer
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
and why?
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.
An example of water changing its state of matter is
mixing water and cooking oil
wood burning
building a snowman
steam rising from a kettle
Every force has __________________ .
direction
strength
push
direction AND strength
When forces are balanced, the net force is __________ .
zero
one
When ____________ forces act on an object, they make the object move.
unbalanced
balanced
Ryan has 2 boxes. One weighs 5 pounds. The other weighs 50 pounds. If he pushes on the boxes with the same amount of force, what will happen?
The 5lb box will move more easily.
The 50lb box will move more easily.
The boxes will move at the same speed.
A stronger force will cause am object to move ________ .
faster
slower
When objects are in contact, they exert ________ on each other.
gravity
forces
balance
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