Mastering Science workbook 2Aanswer?

unit7
Living things and air

ASectional ExerciseSectional Exercise
7.1Gases in the air

I True or false questions (p.1)
1. F
2. F
3. T
4. T
5. F
6. T

II Fill in the blanks (p.1)
1. atmosphere
2. noble gas
3. glowing, oxygen
4. milky
5. carbon dioxide, higher

III Multiple-hoie questions (p.2)
1. D
2. B
3. C
4. D
5. D
6. B

IV Questions (p.4)
1

a
Gas B is oxygen
because it relights a glowing splint.

b
Gas S turns lime water milky. It is carbon dioxide.
The gas remains is gas C which does not relight a glowing splint and does not turn lime water milky.
Gas C is nitrogen.

c
A