5.6A
This property describes the amount of matter in an object and is usually measured in grams.
mass
Two or more substances combined without forming a new substance make this.
mixture
The substance that dissolves in a solution is called this.
solute
A force that moves an object away from the person applying the force.
push
In an investigation, this is the variable the scientist purposely changes.
independent variable
A plastic ball floats in water, but a metal bolt sinks. The plastic ball has this relationship to water.
less dense than water
A student combines red beads and blue beads. The beads can still be identified by this observable property.
color
The substance that does the dissolving is called this.
solvent
Two students push a box in opposite directions with 10 newtons each. These forces are described this way.
equal or balanced forces
In an investigation, this is the result that is observed or measured.
dependent variable
A student places a material near a magnet, and the material moves toward it. The material has this physical property.
magnetism
This tool can separate iron filings from sand.
magnet
A student combines 20 grams of sugar with 180 grams of water in a closed container. This is the total mass of the solution.
200 grams
One student pushes a cart right with 14 newtons while another pushes left with 9 newtons. This is the net force and direction.
5 newtons to the right
A student changes the height of a ramp and measures the distance a toy car travels. Identify the independent variable.
height of the ramp
A material allows electric energy to move through it easily. It is classified as this.
electrical conductor
A mixture contains gravel, sand, and water. Name one property that could be used to separate the gravel from the sand.
particle size
Salt crystals are visible before mixing but not afterward. Does the salt still exist in the solution? Explain.
Yes. The salt dissolved, but its matter and mass are still present.
A toy car is pushed with 2 N, 4 N, and 6 N. It travels farther each time the force increases. State the pattern.
As the force increases, the distance traveled increases.
A student tests how push force affects a toy car’s travel distance. Name two variables that should remain the same.
Any two: same car, surface, starting point, direction, measuring tool, or release method.
A metal pan gets hot quickly, but its wooden handle stays cooler. Explain which material is the conductor and which is the insulator.
The metal is a thermal conductor, and the wood is a thermal insulator.
A mixture contains paper clips, foam pieces, and rice. Describe two steps that could separate all three materials.
Use a magnet to remove the paper clips. Then separate the foam and rice using size, shape, sorting, or floating behavior.
A sealed container has a mass of 250 grams before a drink mix dissolves. Predict its mass afterward and explain the scientific principle.
It will still have a mass of 250 grams because matter is conserved.
A rolling ball hits a stationary block and causes the block to move. Explain what happened to the energy.
Energy was transferred from the moving ball to the block.
Explain why a student should perform at least three trials for each amount of force
Repeated trials make the results more reliable, help identify unusual results, and allow the student to compare or average the data.