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
The use of gamma rays in medical field.
What is sterilizing medical equipment
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
One effect of UV rays on the skin
What is sunburn
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
In an isolated system the total momentum of two or more bodies acting upon each other remains constant unless an external force is applied.
What is the Law of momentum
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
What is attract
The most common radioactive element used in power plants.
What is Uranium.
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.
Wave frequency
What is the number of waves that passes through a point in a certain time