1.what type of component in a scientific investigation is being described?
albert is trying to create an intelligent guess about the probable cause when a sliced apple turns brown after cutting.
a.conclusion
b.experiment
c.hypothesis
d.observation
2.hypothesis:adding fertilizer to my garden makes my eggplants grow faster.which is the dependent variable?
a.eggplant
b.fertilizer
c.garden
d.none of these choices
3.which among these elements is metal?
a.copper
b.hydrogen
c.nitrogen
d.selenium
4.identify the elements in a given chemical formula and their atomic number.NaCI.
a.Niacinamide-10,chloride-16
b.sodium-11,chlorine-17
c.Sodium-12,chloride-18
5.water has a chemical formula of H2o.what are the elements present in this compound?
a.helium-1,oxyen-4
b.helium-1,oxygen5
c.hydrogen-1,oxygen-6
d.hydrogen2,oxygen-7
6. a matter that is a combination of two or more subtances is called________________
a.compound
b.element
c.mixture
d none of these
7.helium,neon,argon,krypton,xenon,and radon are noble gases in what group number in the periodic table of elements?
a.group 16 (VIA)
b.group 16 (VIB)
c group 17(VIIA)
d.group 18 (VIIIA)
8.what elements are in group 1 (IA) in the periodic table of elements?
a.Alkali metals
b.alkaline metals
c.chalcogens
d.halogens
9.what is element that usually found in milk that could help strengthens the bones amd teeth of a human?
a.calcium
b.carbon
c.nitrogen
d.oxygen
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