Pls help my small brother's Science HW!?

Question

1. Which of the following is an example of a disadvantage of thermal expansion and contraction?

A) Used in bimetalic strips in thermostats.
B) Used in riveting to join metal plates.
C) Buckling effect of railway lines.
D) Hot air balloon rises up in the air.

2. A cell ____________.

A) is identical in all organisms
B) is always rectangular in shape
C) contains many nuclei
D) is the basic unit in all organisms

3. Division of labour is found in ________.

(1) a grasshopper
(2) a goat
(3) an amoeba

A) (2) only B) (1) and (2) only
C) (2) and (3) only D) (1), (2), (3)

Answer 1

1) disadvantage of thermal expansion is
C) Buckling effect of railway lines.
2) a cell _______ (D) is the basic unit in all organisms.
3) Division of labour is found in
(2) a goat.

Answer 2

2 is d

Answer 3

modern scholarship has pronounced 4 worry-free recommendations in Dalton's chemical atomic theory. a million) chemical factors are made from atoms 2) the atoms of an ingredient are similar of their thousands 3) atoms of diverse factors have diverse thousands 4) atoms in worry-free words combine in small, total variety ratios which include a million:a million, a million:2, 2:3 etc.

Answer 4

1. C.
2. D.
3. None of the above.

Answer 5

Sorry! Let your "little brother" do his own homework. That way he won't grow up to have a dumba*ss big brother!

Answer 6

1) C
2) D
3) something wrong with that question...can't answer

Answer 7

A, D, D.

Answer 8

C)
D)
C)







$_UK_HI