STUDY
Other, Fun, Other Sciences
8th - 9th Grade
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3 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
how do you calculate to find how many protons and electrons there are??
Subtract the atomic number from the atomic mass. To find the number of neutrons, you will need to subtract the atomic number from the atomic mass. Remember that the atomic number is the same as the number of protons, which you have already identified.
divide to get the answer
add to see with one is the biggest
multiplay to see if it is the right answer.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
what one is physical change
rusting of iron.
cooking an egg.
combustion (burning) of wood.
crushing a can.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
what one is physical change?
mixing an acid and a base, such as hydrochloric acid (HCl) and sodium hydroxide (NaOH)
metabolism of food in the body.
melting an ice cube.
combustion (burning) of wood.
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