Physical Properties
What does it mean if an object floats in water?
It is less dense than water.
What happens when a substance like sugar dissolves in water?
It creates a solution
What happens when forces are balanced?
No change in motion
What is a constant in an experiment?
A variable that stays the same
Give an example of a mixture.
Trail mix or sand and water
What property helps us decide if an object will float or sink?
Relative Density
Name two tools used to separate mixtures
Paper filter, sieve/strainer, magnet
Which surface has the most friction: wood, glass, or sandpaper?
Sandpaper
Why is it important to do multiple trials?
To get reliable data
Give an example of a solution.
Salt water or lemonade
Which of these will float: cork, penny, spoon?
Cork
What makes a solution different from a mixture?
In a solution, one substance dissolves completely
Name the two non-contact forces?
Gravity & magnetism
A class tests how the type of surface (carpet, tile, or wood) affects how far a toy car rolls.
What is the independent variable?
The type of surface
Which force pulls objects to the ground?
Gravity
Rubber, Glass, and Paper are all ________
Insulators
Which can be separated with a strainer: gravel & water or salt & water?
Gravel and water
What tool measures force?
Spring scale
When planning an investigation about gravity, which object would best demonstrate its effect?
1. A ball dropped from different heights
2. A magnet sticking to a refrigerator
1. A ball dropped from different heights