MC	8^th Grade Integrated Science	Standard: 02
Objective: 01. Compare ways that plants and animals obtain and use energy
ILO:

Which substances are the products of photosynthesis?

a. carbon dioxide and oxygen

b. carbon dioxide and water

c. glucose (sugar) and oxygen

d. glucose (sugar) and water

Correct Answer: c

MC	8^th Grade Integrated Science	Standard: 02
Objective: 01. Compare ways that plants and animals obtain and use energy
ILO:

In the equation above, what does mean?

a. Sunlight is not a necessary part of this equation.

b. Sunlight causes the change to occur.

c. Sunlight represents the raw materials needed.

d. Sunlight must come from a specific direction.

Correct Answer: b

MC	8^th Grade Integrated Science	Standard: 02
Objective: 01. Compare ways that plants and animals obtain and use energy
ILO:

Many scientists believe EarthÕs early atmosphere had no oxygen. Humans need oxygen to survive. According to some theories plants had to photosynthesize before humans could live on Earth. What evidence backs up this statement?

a. Humans cannot survive without water.

b. Doctors tell us both plants and humans need sunlight.

c. Plants use carbon dioxide and water to photosynthesis.

d. Plants give off oxygen during photosynthesis.

Correct Answer: d

MC	8^th Grade Integrated Science	Standard: 02
Objective: 01. Compare ways plants and animals obtain and use energy.
ILO:

Read the following information to answer the questions that follow.

In 1648, a Flemish alchemist, Jan van Helmont, had a theory. To test it, he grew a tree in a tub of soil, adding nothing but measured quantities of water for five years. During that time he kept track of the weigh of the soil and the tree. At the end of the experiment the tree had gained 164 pounds and the soil had lost 2 ounces.

What could von Helmont conclude from his experiment?

a. Most of the treeÕs increase came from the soil.

b. Trees need only soil and light to grow.

c. Most of the treeÕs increase came from something other than the soil.

d. Trees need only air and soil to grow.

Correct Answer: c

MC	8^th Grade Integrated Science	Standard: 02
Objective: 01. Compare ways plants and animals obtain and use energy.
ILO:

Which substances are necessary for plants to produce sugar through photosynthesis?

a. Water, soil, chlorophyll

b. Water, soil, carbon dioxide, chlorophyll

c. Water, minerals, cell wall

d. Water, roots, oxygen

Correct Answer: b

MC	8^th Grade Integrated Science	Standard: 02
Objective: 01. Compare ways plants and animals obtain and use energy.
ILO:

In a closed terrarium, more photosynthesis is taking place than respiration. Which gas would you expect to increase?

a. Air

b. Carbon dioxide

c. Oxygen

d. Nitrogen

Correct Answer: c

MC	8^th Grade Integrated Science	Standard: 02
Objective: 01. Compare ways plants and animals obtain and use energy.
ILO:

The main source of energy for living things on Earth is:

a. oxygen

b. plants

c. soil

d. sun

Correct Answer: d

MC	8^th Grade Integrated Science	Standard: 02
Objective: 01. Compare ways plants and animals obtain and use energy.
ILO:

An organism produces sugars from carbon dioxide and water using light as the energy source for the reaction. This organism would be:

a. An animal

b. A bacteria

c. A fungus

d. A parasite

e. A plant

Correct Answer: e

MC	8^th Grade Integrated Science	Standard: 02
Objective: 01. Compare ways plants and animals obtain and use energy.
ILO:

An organism produces sugars from carbon dioxide and water using light as the energy source for the reaction. This organism would be:

a. An animal

b. A fungus

c. A parasite

d. A plant

Correct Answer: d

MC	8^th Grade Integrated Science	Standard: 02
Objective: 01. Compare ways plants and animals obtain and use energy.
ILO:

Which of the following produces sugar from carbon dioxide and water using energy from light?

a. worm

b. clam

c. daisy

d. horse

Correct Answer: c

MC	8^th Grade Integrated Science	Standard: 02
Objective: 01. Compare ways plants and animals obtain and use energy.
ILO:

The main source of energy for living things on Earth is:

a. oxygen

b. plants

c. soil

d. the sun

Correct Answer: d

MC	8^th Grade Integrated Science	Standard: 02
Objective: 01. Compare ways plants and animals obtain and use energy.
ILO:

What process do animals use in order to release the energy stored in food?

a. circulation

b. conversion

c. photosynthesis

d. respiration

Correct Answer: d

MC	8^th Grade Integrated Science	Standard: 02
Objective: 01. Compare ways that plants and animals obtain and use energy
ILO:

What energy conversions happen when animals use respiration?

a. Nuclear energy is converted to chemical energy.

b. Chemical energy is converted to nuclear energy.

c. Chemical energy is converted to mechanical energy.

d. Heat energy is converted to chemical energy.

Correct Answer: c

MC	8^th Grade Integrated Science	Standard: 02
Objective: 01. Compare ways plants and animals obtain and use energy.
ILO:

Which substance do plants use for their energy and growth needs?

a. carbon dioxide

b. oxygen

c. sugar

d. water

Correct Answer: c

MC	8^th Grade Integrated Science	Standard: 02
Objective: 01. Compare ways plants and animals obtain and use energy.
ILO:

Which process directly produces the energy needed to carry out life activities?

a. circulation

b. digestion

c. excretion

d. respiration

Correct Answer: d

MC	8^th Grade Integrated Science	Standard: 02
Objective: 01. Compare ways plants and animals obtain and use energy.
ILO:

The process of respiration is important because:

a. it releases energy from food

b. it transports food to where it is needed

c. it removes wastes from the body

d. it produces food

Correct Answer: a

MC	8^th Grade Integrated Science	Standard: 02
Objective: 01. Compare ways plants and animals obtain and use energy.
ILO:

Which example illustrates the movement of energy from the sun through living things

a. Light energy to chemical energy to mechanical energy

b. Light energy to mechanical energy to chemical energy

c. Heat energy to light energy to chemical energy

d. Heat energy to chemical energy to light energy

Correct Answer: a

MC	8^th Grade Integrated Science	Standard: 02
Objective: 01. Compare ways plants and animals obtain and use energy.
ILO:

Which example illustrates the movement of energy from the sun through living things?

a. light energy to chemical energy to mechanical energy

b. light energy to mechanical energy to chemical energy

c. heat energy to light energy to chemical energy

d. heat energy to chemical energy to light energy

Correct Answer: a

MC	8^th Grade Integrated Science	Standard: 02
Objective: 01. Compare ways that plants and animals obtain and use energy
ILO:

What type of energy is stored in a plant and then used in muscle cells of an animal that ate the plant?

a. mechanical energy

b. electromagnetic energy

c. chemical energy

d. heat energy

Correct Answer: c

MC	8^th Grade Integrated Science	Standard: 02
Objective: 01. Compare ways that plants and animals obtain and use energy
ILO:

1. photosynthesis

2. mechanical energy

3. light energy

4. respiration

Study the list above. Which sequence best shows the path of energy that allows animals to move?

a. photosynthesis --> light energy --> mechanical energy --> respiration

b. mechanical energy --> light energy --> photosynthesis --> respiration

c. light energy --> photosynthesis --> respiration --> mechanical energy

d. respiration --> light energy --> photosynthesis --> mechanical energy

Correct Answer: c

MC	8^th Grade Integrated Science	Standard: 02
Objective: 01. Compare ways that plants and animals obtain and use energy
ILO:

light energy --> mechanical energy by respiration

1 2

Energy from the sun goes through changes and can become mechanical energy in an animal. What should be changed in the above energy transfer from the sun to make it more accurate?

a. photosynthesis should be step 1

b. respiration should come before light energy

c. heat energy should be step 3

d. photosynthesis should come between step 1 and 2

Correct Answer: d

I	8^th Grade Integrated Science	Standard: 02
Objective: 01. Compare ways that plants and animals obtain and use energy
ILO:

Elodea is an underwater plant. A goodly sample of Elodea is placed under a graduated glass beaker under a bright light. The glass beaker is balanced evenly on 3 identical rocks so it is off the floor of the tank. See the diagram.

1. Predict what you will see after 20 minutes.

a. a gas will collect in the beaker

b. the Elodea will shrivel

c. bubbles will come out of the beaker

d. the Elodea will turn a darker green

2. How should the results of this experiment be measured?

a. volume in mL

c. volume in cm

d. compare to color chart

e. count the bubbles

3. Why was the beaker raised up on rocks?

a. to make the Elodea closer to the light

b. so you could better see what happened

c. to make sure the Elodea did not touch to tank bottom

d. so water could escape from the beaker

Correct Answers:

1. a

2. a

3. d

E	8^th Grade Integrated Science	Standard: 02
Objective: 01. Compare ways that plants and animals obtain and use energy
ILO:

In two paragraphs or more, compare (find similarities) and contrast (find differences) photosynthesis and respiration. Include at least 2 similarities and 2 differences. (20 points)

Possible Correct Answers:

How they are similar: plants use both

both deal with O₂, CO₂, H₂O, sugar and energy

both are cellular processes

both are chemical reactions

how they are different: photosynthesis provides food, respiration makes food usable

the products of photosynthesis are nearly the same as the reactants of respiration

the products of respiration are nearly the same as the reactants of photosynthesis

photosynthesis requires light

Scoring Guide: Students must write two paragraphs, 2 similarities and 2 differences for full

credit.

only 1 similarity                                              &