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WorksheetsUnit 1 Review
Total questions: 24
Worksheet time: 12mins
What is an element?
two types of atoms combined, using two or more capital letters combined.
a mixture of one type of atom with two types of atoms not combined
one type of atom, using only one capital letter
dissolves in medium
This is an example of
mixture of compounds and elements
compounds
elements
Cracking and egg
Chemical change
Physical change
Burning Sugar
Chemical Change
Physical Change
Rotting food
Chemical Change
Physical Change
Cutting hair
Chemical Change
Physical Change
Cutting hair
Chemical Change
Physical Change
What is a compound?
one type of atom with one capital letter
two or more elements combined with 2 or more capital letters combined
a mixture of elements and compounds not combined
This is an example of a(n)
element
compound
mixture
These are examples of
elements
compounds
mixtures of compounds and elements
Which best describes the model?
Physical Change, no new substance was produced
Physical change, new substance was produced
Chemical change, no new substance was produced
Chemical change, new substance was produced
Which is a NOT a physical change?
two colorless liquids mixed together and a new substance was formed
water being boiled, bubbles being formed
no change in temperature when two liquids are mixed
object being broken down
What is an example of a SOLUTE?
water
salt
saltwater
Mrs. Perez went to go pick up students for lunch detention but left her spoon in her soup. When she got back, the spoon was really hot. What kind of heat transfer occurred?
Convection
Radiation
Conduction
Which would NOT affect how fast a solute would dissolve?
Temperature
Time of day
Amount of solvent
Amount of solute
Which is a better way to dissolve a solute faster?
Smaller crystals increase the surface area exposed to the solvent and speed up dissolving
Smaller crystals decrease the surface area exposed to the solvent and speed up dissolving
Larger crystals increase the surface area exposed to the solvent and speed up dissolving
Larger crystals decrease the surface area exposed to the solvent and speed up dissolving
My back is facing a camp fire, causing my back to be warmer than the front of my body. Which heat transfer occurred if there is no wind present?
Conduction
Convection
Radiation
If fire is touching an object causing it to get hot, this is an example of
Conduction
Convection
Radiation
Walking inside Mrs. Perez room after being in the cold hallway, you feel the warmth difference as soon as you walk in, this is because
Heat goes from the object with lower temperature to the object with higher temperature
heat goes from the object with higher temperature to the object with lower temperature
Heat transfer doesn't work on people
Heat transfer never happens
What happens when thermal energy is taken away from a liquid?
the amount of liquid decreases
the molecules move faster
the temperature of the liquid decreases
the molecules completely stop moving
When the temperature increases, the particles
disappear
move slower
moves faster
stay still
-Heat transfer between two surfaces that touch each other
-the particles or objects exchanging heat do not change their positions
-heat gets transferred from one end of a solid to another
Conduction
Convection
Radiation
-Warmer portions of the substance rise, allowing cooler portions to come down and take their place
-Heat gets distributed in gases and liquids
Conduction
Convection
Radiation
-A hot body releases thermal energy into the surroundings
-Heat travels as visible or invisible rays
-can take place without any medium between the source and the destination (in a vacuum)
Conduction
Convection
Radiation
