Chemistry/Matter
The subatomic particle found outside the nucleus
What is an electron
It causes a change in an object's velocity
What is Force
What form of energy is released in an exothermic reaction?
What is thermal/heat energy
The number of electrons in the outer most shell of an atom
What is valence electrons
Which type of electromagnetic waves would be used for sterilizing medical equipment?
Gamma rays
How many protons does an atom of Fluorine have?
What is 9
The formula for speed
What is distance over time
What energy is produced through friction?
What is thermal/heat energy.
If iron filings is an element, iron filings and sand is a ______
What is a mixture
Which EM wave is responsible for sunburn?
UV rays
Li+ means Lithium atom has ________ electrons.
What is lost
Speed and direction
What is velocity
To prove the hypothesis that heat travels from warmer objects to cooler objects, one has to conduct a/an _______________
What is an experiment.
Rusting of iron is a ________ change while adding sugar in water is ________ change.
What are chemical and physical
The measure from crest to crest of a wave
What is wavelength
The type of nuclear reaction that happens in the sun.
What is fusion
Formula and Units of measure for work and power.
work = force x distance, measured in joules;
power= work/time, measured in watts.
When 2 transparent substances are added in a test tube, a yellow substance was formed. This is a sign of ____________.
What is a chemical change.
2H2O ----------------- O2 + 2H
Is an example of __________ chemical reaction.
What is decomposition.
In magnets, unlike poles (attract or repel)?
What is attract
What do we call the time required for half of a given quantity of a substance—such as a radioactive isotope or drug—to decay, disintegrate, or be eliminated by natural processes
What is half-life
How do you increase the potential energy of a 5 kg ball?
What is increase its height
Light is the energy source for what chemical reaction?
What is photosynthesis.
What type/kind of chemical reaction is photosynthesis?
What is synthesis reaction.
What is the number of waves that passes through a point in a certain time
Wave frequency