ACTIVITY

What do human beings take from plants?What do plants take from animals?

What to use: a diagram of the oxygen-carbon dioxide cycle.What to do:

1. Study the diagram.2. Recall the gas that you exhale and inhale to make the diagram complete.

What you have found out:1. What gas do humans exhale?_________________________ inhale? _______________2. Where does the gas that we inhale come from? ____________________________________________________3. What gas do we get from plants?_________________________4. What gas do plants take from us?_________________________5. What do you call the cycle shown in the diagram? ________________________________________________________________________________________________why?__________________________________________________________________________________

ACTIVITY

What do human beings take from plants?What do plants take from animals?

What to use: a diagram of the oxygen-carbon dioxide cycle.What to do:

1. Study the diagram.2. Recall the gas that you exhale and inhale to make the diagram complete.

What you have found out:1. What gas do humans exhale?_________________________ inhale? _______________2. Where does the gas that we inhale come from? ____________________________________________________3. What gas do we get from plants?_________________________4. What gas do plants take from us?_________________________5. What do you call the cycle shown in the diagram? ________________________________________________________________________________________________why?__________________________________________________________________________________

ACTIVITY

What do human beings take from plants?What do plants take from animals?

What to use: a diagram of the oxygen-carbon dioxide cycle.What to do:

1. Study the diagram.2. Recall the gas that you exhale and inhale to make the diagram complete.

What you have found out:1. What gas do humans exhale?_________________________ inhale? _______________2. Where does the gas that we inhale come from? ____________________________________________________3. What gas do we get from plants?_________________________4. What gas do plants take from us?_________________________5. What do you call the cycle shown in the diagram? ________________________________________________________________________________________________why?__________________________________________________________________________________

ACTIVITY

What do human beings take from plants?What do plants take from animals?

What to use: a diagram of the oxygen-carbon dioxide cycle.What to do:

1. Study the diagram.2. Recall the gas that you exhale and inhale to make the diagram complete.

What you have found out:1. What gas do humans exhale?_________________________ inhale? _______________2. Where does the gas that we inhale come from? ____________________________________________________3. What gas do we get from plants?_________________________4. What gas do plants take from us?_________________________5. What do you call the cycle shown in the diagram? ________________________________________________________________________________________________why?__________________________________________________________________________________

ACTIVITY

What do human beings take from plants?What do plants take from animals?

What to use: a diagram of the oxygen-carbon dioxide cycle.What to do:

1. Study the diagram.2. Recall the gas that you exhale and inhale to make the diagram complete.

What you have found out:1. What gas do humans exhale?_________________________ inhale? _______________2. Where does the gas that we inhale come from? ____________________________________________________3. What gas do we get from plants?_________________________4. What gas do plants take from us?_________________________5. What do you call the cycle shown in the diagram? ________________________________________________________________________________________________why?__________________________________________________________________________________