WorksheetsPhases of matter and chemistry
Total questions: 10
Worksheet time: 10mins
A chemical reaction in which more energy is RELEASED than is absorbed (energy exiting) is called...
Endothermic
Exothermic
Mesothermic
Telethermic
A chemical reaction where energy from the environment is ABSORBED and stored by molecules (energy going IN)
is called....
Exothermic
Endothermic
Mesothermic
In a chemical reaction, the FINAL substances are called the
Reactants
Products
Remainder
Sum
In a chemical reaction, the STARTING substances are called the...
Reactants
Products
Alpha particles
Quarks
What term describes a substance that is made by humans in a laboratory?
Natural
Synthetic
Fake
Which of the following is a SYNTHETIC material?
Tree
Water
Plastic
Oil
True or false: ALL atoms have the same mass
TRUE
FALSE
A powder dissolves in a glass of water. The temperature of the water INCREASES as a result.
This is an example of an _____________ reaction
Endothermic
Exothermic
physical change
no way to know
A powder dissolves in water. The temperature of the water DECREASES as a result.
This is an example of a ___________ reaction
Endothermic
Exothermic
Mesothermic
None of these
How many TOTAL atoms of Oxygen (O) are there in 5CO2?
1
2
5
10
