Worksheets12/5/24 Practice assignment
Total questions: 35
Worksheet time: 22mins
____________ is the amount of matter in an object.
Mass
Volume
Weight
Density
Any chemical reaction that absorbs heat is called ________.
Endothermic energy
Physical Change
Chemical Change
Exothermic energy
Used to measure motion and energy of particles in matter to determine the amount of cold or hot the matter is exerting:
Density
Thermal Energy
Volume
Temperature
If you measure matter it should be measured using its ______________ and volume.
Density
Mass
Weight
Thermal Energy
Endothermic means the energy is being _______________
released
released and absorbed
absorbed
not changed
Exothermic means energy is being ____________________
released
absorbed
released and absorbed
Not changed
A characteristic that can be observed or measured WITHOUT changing the identity of the substance
Physical Property
Chemical Property
Select ALL examples of PHYSICAL PROPERTIES.
Texture
Color
Hardness
Flamability
Ability to rust
A substance that takes part in and undergoes change during a reaction
Reactant
Product
The elements or compounds produced by a chemical reaction
Products
Reactants
Changes in the form or appearance of a substance. It does NOT change the substance into anything new
Phycial Change
Chemical Change
Select ALL examples of a PHYSICAL CHANGE.
Chopping wood
Whipping eggs
A match burning
Hand sanitizer evaporating in your hand
Digesting food
When two or more substances join to form new substances with new chemical properties
Chemical Change
Physical Change
Select ALL examples of a CHEMICAL CHANGE.
Baking a cake
Freezing water into ice
Iron rusting
Disolving salt into water
Bread rising
Heat (energy) is absorbed by the reaction and the surrounding substance gets cooler.
Endothermic reaction
Exothermic reaction
Heat (energy) is released by the reaction and the surrounding substance gets warmer
Exothermic reaction
Endothermic reaction
A new substance that forms during a chemical reaction
product
prototype
exothermic reaction
reactant
the state of matter in which atoms or molecules are closely packed and touching one another but are not held in fixed positions.
gas
solid
liquid
pressure
the state of matter in which atoms or molecules are completely separated from one another by empty space and can move around independently of one another
solid
gas
liquid
boiling point
a measure of the average kinetic energy of the particles of a substance
heat
thermal energy
temperature
pressure
thermal energy transferred from a warmer object to a cooler one
heat
gas
phase change
temperature
Chemical formulas are used to represent _________________.
reactions
substances
processes
none of the above
Chemical equations are used to represent _________________.
reactions
substances
processes
none of the above
A ___________________ uses chemical formulas, plus signs, and an arrow to represent a chemical reaction
chemical formula
chemical equation
element symbol
inventory
This is an example of a ___________________________.
chemical formula
chemical equation
What are the starting materials in a reaction?
product
subscript
coefficient
reactants
What is the substance that is formed after a chemical reaction called?
product
subscript
coefficient
reactants
In a chemical equation, what are the substances on the left side of the arrow called?
yields (results in)
products
reactants
chemicals
In a chemical equation, what are the substances on the right side of the arrow called?
yields (results in)
products
reactants
chemicals
What are the reactants in this chemical reaction?
CH4 + 2O2 ----> CO2 + 2H2O
CH4 and CO2
O2 and CH4
CO2 and H2O
H2O and O2
What are the products in this chemical reaction?
CH4 + 2O2 ----> CO2 + 2H2O
CH4 and O2
CO2 and H2O
CH4 and CO2
H2O and CH4
In the chemical equation below, the product is....
Na + Cl ---> NaCl
Na
NaCL
Cl
NaCl
What is underlined in the chemical equation below?
Na + Cl ---> NaCl
Products
Reactants
Select all the Reactants
Select all the reactants
