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Science Benchmark Review Worksheet
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Which side of the formula are the reactants?
Left
True or False- Dissolving lemonade mix into water is an example of a chemical change.
False! Chemical changes include: burning wood, rusting, digesting food, souring milk,
What happens to the vibration of molecules when they get hot?
The vibration INCREASES
What is the definition of mass?
The amount of matter in a substance.
What is a control group?
A control group is a group of subjects in an experiment that do not receive the treatment being tested
What is a valence electron?
An electron in the outermost shell of an atom.
What are Electron Shells?
Regions around the nucleus containing electrons.
How is the Periodic table arranged?
Elements on the periodic table are arranged by increasing atomic number.
Define Conservation of Mass?
Mass cannot be created nor destroyed, only transformed.
What is Refraction?
The bending of light when it passes from one medium to another.
Which type of rays are considered the most dangerous?
Gamma Rays are considered the most dangerous type of electromagnetic radiation because they carry the most energy.
What is absorption?
The light ray striking the object is taken in by the object.
Longitudinal wave
A wave that has vibrations parallel to the direction of the wave's travel.
Transverse wave
A wave that vibrates perpendicular to the direction of the wave's travel.
What is a series circuit?
A circuit that only has ONE path for electricity to flow.
True or False: When a substance changes from gas to liquid to solid the molecules release heat energy.
True
What is Conduction?
The transfer of heat through direct contact.
What is the direction of Heat Movement?
From warmer to cooler.
What is a Dependent Variable?
The variable that gets measured in an experiment.
Best Thermal Conductor
metal
What is the primary Method of Heat Transfer in Boiling Water?
Convection.
What is the Energy conversion when a Book falls off a desk?
Potential to kinetic.
What is the energy Transformation in Flashlight?
Chemical to electrical.
How do you calculate Density?
D=m/v
What tool is used to measure mass?
Triple-beam balance.
Where do you read the level of a liquid in a graduated cylinder?
25 mL if the meniscus is at that level.
What is an Independent Variable?
The variable that is manipulated (changed) in an experiment.
Noticing that the leaves on the trees are turning yellow is an observation? True or False?
True
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