physical and chemical changes
...... is a chemical change in green plants that produce energy and oxygen.
...
photosynthesis is a chemical reaction in green plants that produces energy and oxygen
...
photosynthesis is an important chemical reaction on earth
...
..... can play a large role in the physical change of matter
energy
all chemical changes occur at the same speeds
false
chemical changes occur at the same speeds
false
in a chemical change the same substance is formed
false
ina physical change matter cannot change its shape.
false
matter always stays the same
false
rust is a substance produced by iron reacting with water
false
...... describes the ability of a substance to burn
flammability
a clue that a chemical change is occuring in a burning flame is that ...... is given off.
heat
in a chemical change a..... substance is formed.
new
ina chemical change, a ..... substance is formed.
new
ice melting is an example of a ..... change
physical
ice being broken down into small bits is an example of a...
physical change
a chemical ..... is a way to describe how matter reacts with other matter.
property
in a physical change the matter does not change...
property
a chemical .... is the chemical change in which one or more substances change.
reaction
...... is the substance that is produced by iron reacting with oxygen in the air.
rust
........ does not always stay the same and can undergo physical and or chemical changes
solids
a chemical change is a process by which a certain substance becomes a different substance.
true
a physical change is a change in size shape or phase of matter without the matter changing chemically
true
chemical reactions occur when two or more substances combine to form a new substance
true
every time you move, a chemical change occurs
true
heat is a clue that chemical change is occuring
true
temperaturecan play a big role in physical changes
true
the ability to burn is a chemical property called flammability
true
flammability is the chemical property describing how a substance.........
burns
chemical changes occur at ..... speeds
different