Ava observes that a certain species of bird follows behind a herd of cattle. the bird species primarily eats insects. the birds stay
with the herd of cattle as they graze.
what is a scientific hypothesis that ava could formulate based on her observations?
a.
do the birds get any benefit from following the herd of cattle?
b.
the birds follow the herd because the cows stir up insects for the birds to eat.
c.
the birds are happier around big herds of cattle rather than small herds.
od. why does this species of bird follow herds of cattle?
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you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

c.

explanation:

the answer is 303.15 or 303

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer