Matter & Physical Properties
What tool would you use to measure the mass of an object?
A balance
What do we call two or more substances combined together?
A mixture
Is kicking a soccer ball a push or a pull?
A push
What force can slow down an object when two surfaces rub together?
Friction
An object that is less dense than water will usually do what?
Float
A cork and a metal spoon are about the same size. The spoon has more mass. Which object is more dense?
The metal spoon
Is a bowl containing cereal and raisins a mixture?
Yes
What force pulls objects toward Earth?
Gravity
Would a toy car usually travel farther on smooth tile or rough carpet?
Smooth tile
An object that is more dense than water will usually do what?
Sink
A block sinks when placed in water. Is its density most likely higher or lower than water?
Higher
You mix paper clips and dry beans. Name one way you could separate the mixture.
Use a magnet to remove the paper clips.
A student pushes a heavy box, but it does not move. What could the student do to make it move?
Apply more force
Why does a toy car usually travel a shorter distance across carpet?
The carpet creates more friction
A cold water bottle sits on a desk. Later, water droplets appear on the outside. Where did the water come from?
Water vapor in the air
Two objects are the same size, but Object A has a mass of 20 g and Object B has a mass of 45 g. Which is more dense?
Object B
Mia combines 20 g of beads with 30 g of buttons. What should the mass of the mixture be?
50 g
You hold a magnet near a paper clip without touching it, and the paper clip moves. Is this a contact or non-contact force?
Non-contact force
A toy car travels 60 cm on a smooth surface but only 30 cm on a rough surface. How many times farther did it travel on the smooth surface?
2 times farther
What change happens when water vapor cools and becomes liquid water?
Condensation
A large foam ball and a small metal ball are placed in water. The foam floats and the metal sinks. Why can the smaller object sink even though it is smaller?
Size does not determine density. The metal ball is more dense than water.
A student mixes 40 g of sand and 25 g of pebbles. The student predicts the mixture will have a mass of 45 g. Is the student correct? Explain.
No. The mixture should have a mass of 65 g because the total mass is conserved.
Two identical balls are dropped from the same height. One has more mass. What investigation could you perform to compare how gravity affects their motion?
Drop both from the same height at the same time and observe/measure their motion.
You want to investigate how surface type affects a toy car’s motion. What should you change, and what should you keep the same?
Change the surface. Keep things such as the car, starting point/ramp height, and starting force the same.
A student puts three liquids into a clear container. Liquid A settles at the bottom, B stays in the middle, and C stays on top. Which liquid is most dense? Which is least dense?
A is most dense; C is least dense.