Vocabulary
What is matter?
Anything that has mass
What is a single kind of matter with a specific composition/ pure matter.
A substance is always a pure kind of matter, it has s specific composition.
The Greek Philosopher that proposed that all matter was made of four elements
Empedocles
What causes weight change in other planets?
The force of gravity affects weight but not mass.
What happens to a substance when it goes through a physical change?
The substance doesn't change, just its form.
What is energy?
What are some examples of physical properties of matter?
Hardness, texture, color, and freezing point.
A substance that cannot be broken down into any other substance
element
What is the SI unit of mass?
kg/ kilograms
What happens to a substance when it goes through a chemical change?
The substance transforms to a new substance with new properties.
What is heterogenous?
What is homogenous?
Heterogenous is when we mix two or more substances but we can still see the substances
Homogenous is when two or more substances are evenly mixed
What are some examples of a chemical change?
burning, rust, chemical reactions that create a new substance
What is the difference between a compound and chemical formula
a compound is a substance made of two or more elements. a chemical formula is the ratio of atoms in a compound.
What is the SI unit of Volume?
What is the formula for Volume?
cubic meter-m3
Volume= LxWxH or area times width
The law of conservation of mass states that
matter cant be created nor destroyed
What is a physical change?
What is a chemical change?
A physical change is when a substance stays the same.
A chemical change is when the substance changes to another substance.
Give me an example of a physical change.
open ended
What are different ways to separate mixtures.
Filtration, magnetic attractions, distillation, and evaporation.
What is the formula for density?
Using the formula, what is the density of an object that has 108 g mass and a volume of 12cm3
D= Mass/Volume
108/12= 9g/cm3
Chemical energy is stored in the chemical bonds between atoms. Chemical energy is also stored in
Chemical energy is stored in food, fuels, and body cells
What is exothermic change?
What is endothermic change?
Exothermic is when it is releasing heat.
Endothermic is when heat is being absorbed.
Give me an example of a chemical change
open ended
How does filtration, magnetic attraction, distillation and evaporation separate mixtures?
filtration: use of a filter
Magnetic Attraction: using a magnet
distillation: using heat and boiling temperature causing a gas to separate liquids
evaporation: leaving a liquid in open air so it becomes a gas leaving solid components behind
If an object has a density greater than 1g/cm3 it will do what in water?
Will a rock with 13g mass and volume of 13.5 cm3 sink or float?
Sink
Density if 0.96 g/cm3 will float because it has a density of less than 1g/cm3
What happens when you burn fuel
it transforms chemical energy and releases some of it as thermal energy.