2)Plants use when they manufacture food.
a)carbon dioxide b)nitrogen c)oxygen d)argon
3)Air is a mixture of gases. Which gas is least abundant?
a)hydrogen b)nitrogen c) helium d)oxygen
4)Strong wind can move objects. This force is known as
a) cool air b)gases c)air pressure d)motion
5)Oxygen will cause a glowing fire to
a)go out very quickly b)burn more rapidly
c)get dim d)not to light
6)Which gases are exchanged between human and plants?
a)oxygen and carbon dioxide b)carbon dioxide and nitrogen
c)hydrogen and oxygen d)nitrogen and hydrogen
7)The strong wind blew the flower pot out of its place. This incident shows that air
a)occupies space b) is colourless and odourless
c)exerts pressure d) is made up of different gases.
8)Which gas is needed for plant growth?
a)carbon dioxide b) oxygen c) nitrogen d) neon
9)What is the commonest noble gas in the air?
a) oxygen b) nitrogen c) argon d) neon
10) Which is the only process that produces oxygen?
a) combustion b) respiration c) decay d) photosynthesis
Answer these questions on the lines provided.
1)What is the meaning of the following terms? (3 marks)
a)respiration
b)photosynthesis
c)noble gas?
2)How do you know that air is in an object? (2 marks)
3)List three (3) things which indicate that air is all around us. (3 marks)
4)List three (3) ways in which we use air.(3 marks).
5)What are three (3) main components of air? (3 marks)
this is science its just that theres no science option i am deeply sorry
Answers: 2
English, 21.06.2019 18:30
When you don’t understand a concept during the lecture, it’s to flag it in your notes and leave a blank space so you can fill in more
Answers: 1
English, 22.06.2019 00:10
2. page 1: schlosser describes "just another gorgeous rocky mountain vista. and yet cheyenne mountain is hardly pristine." why do you think schlosser describes the beautiful cheyenne mountain scene in detail before describing the military installation that lies inside?
Answers: 3
English, 22.06.2019 04:00
Which poems include the theme that memories of beautiful natural places benefit the people who recall them? "to spring" and "lines written in early spring" "to autumn" and "to a butterfly" "to summer" and "the human seasons" "i wandered lonely as a cloud" and "lines on a beautiful spring in a village"
Answers: 2
English, 22.06.2019 05:50
Based on the speaker's viewpoint, whichstatement would he likely disagree with? imagination can be used to gain knowledge.individual knowledge is verified by experttestimony.true knowledge comes from thinking foryourself.knowledge comes from separating yourselffrom the crowd.education does not need to happen in alecture hall.
Answers: 2
2)Plants use when they manufacture food.
a)carbon dioxide b)nitrogen c)oxygen d)argon
...
...
Computers and Technology, 11.09.2019 19:10
English, 11.09.2019 19:10
English, 11.09.2019 19:10
Biology, 11.09.2019 19:10