Biotic Interactions Review

Test Date: October 9th, 2015

1. Which part of photosynthesis do humans benefit from?O2 = oxygen

2. Which part of photosynthesis represents the food for the plant?

C6H12O6 = glucose

3. Identify the ELEMENTS in the following equation:

6H2O + 6CO2 C6H12O6 + 6O2

H = hydrogenO = oxygenC = carbon

4. Super Brain Question!

How many ATOMS are in the equation6CO2 + 6H2O = C6H12O6 + 6O2 ?

For 6CO2, Think: (1 carbon + 2 oxygen) x 6 = 3x6

=18

18 + 18 = 24 + 12

36 = 36Reactants = 36 atoms Products =

36 atoms The atoms are the same. They just re-

group!

5. What type of energy transfer occurs during photosynthesis?

Radiant energy becomes chemical energy

6. Use the photosynthesis equation to fill in the boxes below.

6CO2

Carbon dioxide6H2Owater

C6H12O6 glucose

6O2oxygen

7. Energy PyramidProducers =

grasswheat

1st level =rabbitmouse

grasshoppertermite

2nd level =mousesnakeshrew

woodpeckerfox

3rd level =fox

8. Vocabulary Matching__C___ 1. Ecosystem

__D___ 2. Food Chain

__G___ 3. Omnivore

__I___ 4. Producer

__J___ 5. Consumer

__E__ 6. Food Web

__F___ 7. Herbivore

__A___ 8. Carnivore

__B___ 9. Decomposer

__H___10. Photosynthesis

9. What is the process that starts a food web?

Photosynthesis

What is the main source of energy in an energy pyramid?

That’s the same sun from the other slide!

10. What did the Gatorade activity demonstrate?

It showed how energy is lost as it moves up the energy pyramid from one level to the next.

11. Decomposers

Decomposers are organisms that break down organic material. They are important, because they return nutrients to the soil.

worms

bacteria

fungi

12. Scavengers

Scavengers are animals that feed off the dead bodies of other animals.

Buzzards (top) and vultures (bottom) clean up ecosystems and recycle the energy.

13 & 14. Autotroph and Heterotroph

An autotroph is an organism that makes its own food.

auto = self;

It makes food for itself.

A heterotroph gets its food by consuming another organism.

hetero = different

It gets its food from a different organism.

15. Biodiversity vs. Monoculture

biodiversity: the variety of species living in an area; the more species there are, the greater the biodiversity

monoculture: an area where only one species lives

(prefix “mono” = one)

16. How does biodiversity contribute to the sustainability of an ecosystem?

Biodiversity makes an ecosystem more sustainable.

If one species is lost, the ecosystem can still survive.

(Remember the Douglas Firs activity!)

17 – 21 Food Webs

Producer = redConsumer = bluePredator/ prey = green

Producer = redConsumer = bluePredator/ prey = green

22. Food Chain example

23. Energy Pyramid

the flow of energy

Producers

Primary Consumers

SecondaryConsumers

3rd LevelConsumers

DecomposersScavengers

Sixth Grade ReviewI

thought this was

7th grade,

but whateve

r.

24. Energy Transformation

energy transformation: the process of changing

energy from one form to another

24. & 25. Elements and Compounds

element: any substance that cannot be broken down into simpler substances.

compound: two or more elements chemically

bonded together in a set ratio

26. Manipulated (independent) and responding (dependent) variablesKeeping the lights on for different amounts of time each day affected the number of eggs chickens laid.

Does the amount of time the lights are on depend on the number of eggs laid?

OR

Does the number of eggs laid depend on the amount of time the lights are on?

Number of eggs depends on amount of time lights are on, so… Dependent = number

of eggs laid Independent = amount

of time lights are on

YOU WILL DO GREAT ON THIS TEST!