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Class
Date
Section 8.1 - Energy and Life (pg. 192-194)
Compare/Contrast Table Use a compare/contrast table when you want to see the
similarities and differences between two or more objects or processes. As you read, place an “X”
in the box next to characteristics that are true of an autotroph or a heterotroph. One has been done
for you.
Autotroph
Directly uses sunlight for energy
Heterotroph
X
An oak tree is an example.
A mushroom is an example.
Makes its own food
Consumes other living things to get
energy
Is capable of photosynthesis
Heterotrophs and Autotrophs
Look at the feeding relationships in each food chain. Each food chain contains an autotroph and
one or more heterotrophs.
Follow the directions.
1. Draw an X in the boxes that are autotrophs.
2. Draw a STAR in the boxes that are heterotrophs.
grass
worm
robin
grass
mouse
hawk
grass
rabbit
cougar
tree/shrub
deer
cougar
coyote
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ATP
ATP is the basic energy source of all cells. Energy is stored by cells when
ADP is converted into ATP. Energy is released when ATP loses a
phosphate and becomes ADP.
Label the energy storing reaction and the energy releasing reaction.
ADP
+
Phosphate
ATP
ATP
ADP +
Answer the questions.
1. How many phosphate groups are in one molecule of ATP?
2. How many phosphate groups are in one molecule of ADP?
3. What are the three parts of an ATP molecule?
Phosphate