Rapid Recall
What is Matter?
Anything that has mass and takes up space
Hardness: physical or chemical property?
Physical
Which changes with gravity: mass or weight?
Weight
What is the law of conservation of mass?
Matter is not created of destroyed during a chemical or physical change
Hot drink in cold room: thermal energy moves which way?
From the warm drink to the cold surroundings
Charge of a proton
Positive
Ability to rust: physical or chemical property?
Chemical
What is the SI unit for mass from this unit?
Kilogram
What is the formula for density?
density=mass/volume.
Releases thermal energy: endothermic or exothermic?
Exothermic
Charge of an Electron
negative
Mixed nuts: homogeneous or heterogeneous?
Heterogeneous
A box is 6 cm × 4 cm × 2 cm. Find its volume.
48 cm³
Difference between an element and compound?
Element = one type of atom compound = multiple elements chemically combined in set ratio.
A whale is migrating from Florida to Canada, in what water is there more transfer of thermal energy? The waters of Florida or the waters of Canada.
The cold waters of Canada
What is a molecule?
Two or more atoms held together by chemical bonds.
Salt water: homogeneous or heterogeneous?
Homogeneous
Mass = 45 g; volume = 15 cm³. Find density.
3 g/cm³
Ice floats in liquid water. What does this tell us about the density of ice vs water
Ice is less dense than water
Absorbs thermal energy: endothermic or exothermic?
Endothermic
What is an element
Matter made of only one type of atom.
A change produces a new substance: physical or chemical change?
Chemical
Density = 4 g/cm³; volume = 5 cm³. Find mass.
20 g
Which method separates materials using boiling points?
Distillation
Is combustion an endothermic or exothermic change and why?
Exothermic- Energy is released